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Earth Sciences

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2017

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Articles 31 - 60 of 101

Full-Text Articles in Physical Sciences and Mathematics

Quantitative Literacy In The Affective Domain: Computational Geology Students’ Reactions To Devlin’S The Math Instinct, Victor J. Ricchezza, H. L. Vacher Jul 2017

Quantitative Literacy In The Affective Domain: Computational Geology Students’ Reactions To Devlin’S The Math Instinct, Victor J. Ricchezza, H. L. Vacher

Numeracy

Building on suggestions from alumni from a recent interview project, students in Computational Geology at the University of South Florida were tasked with reading a popular non-fiction book on mathematics and writing about the book and their feelings about math. The book, The Math Instinct by Keith Devlin, was chosen because we believed it would give the students something interesting to write about and not because we had any expectations in particular about what it might reveal about or do for their math anxiety. The nature of the responses received from the students led to the performance of a post-hoc …

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The Influence Of Long-Term Anthropogenically-Induced Compaction On Select Properties Of Soils In The Midwestern United States, Eric C. Brevik Jul 2017

The Influence Of Long-Term Anthropogenically-Induced Compaction On Select Properties Of Soils In The Midwestern United States, Eric C. Brevik

Georgia Journal of Science

Soil compaction by heavy equipment has become one of the most important problems in modern large-scale plant production, but one area that has not received much attention is the effect of soil compaction on prairie soils over time periods in excess of about 10 years. This study addresses this issue by comparing properties in compacted to noncompacted soils in an abandoned farmyard and along a preserved stretch of the Mormon Trail. Properties compared include soil morphology, bulk density, carbon, C/N ratio, and ap­parent electrical conductivity (ECa). Bulk density, organic carbon, and ECa values were consistently different in …

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Hydrogeology Of Salt Karst Under Different Cap Soils And Climates (Persian Gulf And Zagros Mts., Iran), Jiri Bruthans, Jiri Kamas, Michal Filippi, Mohammad Zare, Alan L. Mayo Jun 2017

Hydrogeology Of Salt Karst Under Different Cap Soils And Climates (Persian Gulf And Zagros Mts., Iran), Jiri Bruthans, Jiri Kamas, Michal Filippi, Mohammad Zare, Alan L. Mayo

International Journal of Speleology

Southern Iran hosts abundant salt karst phenomena in numerous salt diapirs. This paper provides a new insight into the relationships among climate, cap soil and salt karst hydrogeology. Cave systems were documented and mapped. Soil, drip, stream, and flood waters from different environments were studied at several diapirs. It was revealed that the soil water chemistry depends on both the climate and cap soil thickness. In semi-arid climates, a thick cap soil forms (>3 m) and water has very low TDS values (0.15 g/l). In arid climates, a shallow cap soil forms, and soil water is gypsum-saturated with low …

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Review Of "Roadside Geology Of Georgia" By Pamela J.W. Gore & William Witherspoon, Michael Roden Jun 2017

Review Of "Roadside Geology Of Georgia" By Pamela J.W. Gore & William Witherspoon, Michael Roden

Georgia Journal of Science

Pamela Gore (Professor of Geology at Georgia Perimeter College) and Bill Witherspoon (Fernbank Science Center Faculty) take the reader on a tour of geological sights in Georgia viewed from the numerous highways crossing the state. This book joins a series of Roadside Guides published by Mountain Press and is one of the best of the series. The book opens with an explanation of geologic time and plate tectonics. Amply illustrated, the book includes large-scale geologic maps as well as color images of various geological features. In the introduction the authors explain that Georgia is divided into several geographic divisions, Sea …

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Genesis Of Schlottenkarren On The Avon Peninsula Of Nova Scotia (Canada) With Implications For The Geochronology Of Evaporite Karsts And Caves Of Atlantic Canada, Max Moseley Jun 2017

Genesis Of Schlottenkarren On The Avon Peninsula Of Nova Scotia (Canada) With Implications For The Geochronology Of Evaporite Karsts And Caves Of Atlantic Canada, Max Moseley

International Journal of Speleology

Exposed schlottenkarren karst terrains developed on gypsum-anhydrite evaporites in the Canadian Maritime provinces might be post-Glacial landscape features (formed on glacially-denuded rocks after they are uncovered by progressive erosion of overlying glacial tills) or exhumed pre-Last Glacial Maximum (LGM) morphologies (filled with glacial till and revealed by erosion of the tills). In this paper the hydrological conditions necessary for the formation of schlottenkarren, the speleogenetic processes involved and their chronology are reconsidered and reinterpreted. It is proposed that they are essentially pre-LGM features which have survived from the Wisconsinan. It is concluded that the degree of glacial scouring and denudation …

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Characterizing Great Salt Lake Dust Relative Other Regional Dust Sources, Colin Hale, Carling Greg Jun 2017

Characterizing Great Salt Lake Dust Relative Other Regional Dust Sources, Colin Hale, Carling Greg

Journal of Undergraduate Research

Dust storms occur frequently along the Wasatch Front. These dust events may have negative effects on human health and agriculture. To help understand dust events along the Wasatch Front, this study focuses on analyzing dust deposition to better locate dust emission sources. Understanding the source of dust events is important. This is important because Great Salt Lake water levels are dropping exposing lakebed. This newly expose lakebed may result in increased frequency and intensity of dust events. To understand if this lakebed is affecting the Wasatch Front and acting as an emission source.

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Integrated Approach For Sinkhole Evaluation And Evolution Prediction In The Central Ebro Basin (Ne Spain), Oscar Pueyo Anchuela, Andrés Pocoví Juan, Antonio M. Casas Sainz, Javier Gracia Abadias, Carlos L. Liesa Carrera Jun 2017

Integrated Approach For Sinkhole Evaluation And Evolution Prediction In The Central Ebro Basin (Ne Spain), Oscar Pueyo Anchuela, Andrés Pocoví Juan, Antonio M. Casas Sainz, Javier Gracia Abadias, Carlos L. Liesa Carrera

International Journal of Speleology

Evaluation of karst hazards benefits from the integration of different techniques, methodologies and approaches. Each one presents a different signature and is sensitive to certain indicators related to karst hazards. In some cases, detailed analysis permits the evaluation of representativeness either from isolated approaches or by means of integrated analyses. In this study, we present the evaluation of an area with high density of karstic collapses at different evolutionary stages through the integration of surficial, historical, geomorphological and geophysical data in order to finally define the evolutionary model for karst activity development. The obtained dataset permits to identify different steps …

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Seeing The World Through New Eyes: Implementing Map-Based Mobile Apps In Field Trips And Research, Mariah Chambers, Ron Harris Jun 2017

Seeing The World Through New Eyes: Implementing Map-Based Mobile Apps In Field Trips And Research, Mariah Chambers, Ron Harris

Journal of Undergraduate Research

Mobile apps are a resource that can aid in field trip instruction and enhance students’ learning. Because the specific location of the field trip is often an important element in overall understanding, map-based learning materials can be used to integrate information with the place, providing context for the concepts that will be learned on the field trip. The purpose of this project was twofold. One purpose was to provide professors with information and instructions for using map-based mobile apps to prepare students for, and provide resources during, field trips and study abroad experiences. A second purpose was to implement the …

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Trace Element Analysis Of Quartz Grains In The Wah Wah Springs Tuff And Granodiorite Intrusion, Joel Barker, Dr. Eric Christiansen Jun 2017

Trace Element Analysis Of Quartz Grains In The Wah Wah Springs Tuff And Granodiorite Intrusion, Joel Barker, Dr. Eric Christiansen

Journal of Undergraduate Research

The Wah Wah Springs tuff and cogenetic granodiorite were part of the creation of the Indian Peak-Caliente Caldera Complex, which lies on the Nevada-Utah border (Skidmore, 2013). The complex formed during the middle Cenozoic (36-18 Ma) during an episode of explosive silicic activity (Best et al., 2013). Rollback of the subducting lithosphere likely caused the silicic activity, evidenced by the migration of magmatism southward (Best et al., 2013). The dehydration of the subducting oceanic lithosphere caused mafic magmas high in water to rise and fractionate in continental crust before eruption (Skidmore, 2013). Over twenty-four different ignimbrites have been found in …

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Karst Development Of An Evaporitic System And Its Hydrogeological Implications Inferred From Gis-Based Analysis And Tracing Techniques, José M. Gil-Márquez, Juan A. Barberá, Matías Mudarra, Bartolomé Andreo, Jorge Prieto-Mera, Damián Sánchez, L. David Rizo-Decelis, Manuel Argamasilla, José M. Nieto, Beatríz De La Torre Jun 2017

Karst Development Of An Evaporitic System And Its Hydrogeological Implications Inferred From Gis-Based Analysis And Tracing Techniques, José M. Gil-Márquez, Juan A. Barberá, Matías Mudarra, Bartolomé Andreo, Jorge Prieto-Mera, Damián Sánchez, L. David Rizo-Decelis, Manuel Argamasilla, José M. Nieto, Beatríz De La Torre

International Journal of Speleology

The geomorphological characteristics and hydrogeological functioning of a geologically heterogeneous evaporitic karst plateau in Southern Spain were studied. Land surface information (LiDAR data) was used to analyze the shape and distribution of closed depressions. An artificial tracer test and monitoring of the natural responses of the main spring have allowed to infer the karstic development of the studied system. Three dyes were injected in selected swallow holes to trace the main groundwater flowpaths and to estimate the dimension of the conduit network. Discharge, electrical conductivity and temperature were monitored in the groundwater that drains the evaporitic plateau during an individual …

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Hydrogeological Flow In Gypsum Karst Areas: Some Examples From Northern Italy And Main Circulation Models, Bartolomeo Vigna, Ilenia M. D'Angeli, Adriano Fiorucci, Jo De Waele Jun 2017

Hydrogeological Flow In Gypsum Karst Areas: Some Examples From Northern Italy And Main Circulation Models, Bartolomeo Vigna, Ilenia M. D'Angeli, Adriano Fiorucci, Jo De Waele

International Journal of Speleology

A Messinian succession containing gypsum beds crops out in northern Italy, mainly in Piedmont and along the northern flank of the Apennine mountains in Emilia-Romagna. These gypsum bodies have been extensively quarried at the surface, in outcrops, and through underground quarries. In Emilia-Romagna these gypsum outcrops can be rather extensive, several km long and up to 1 km wide, while in Piedmont they are mostly covered by silty-marly deposits of Upper Messinian and Pliocene age and show only sparse and small outcrops. The underground quarrying of these evaporite bodies in Piedmont has allowed studying in detail their hydrogeology, and the …

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Long-Term Tillage And Nitrogen Fertilization Effects On Soil Surface Chemistry, A. Obour, J. D. Holman Jun 2017

Long-Term Tillage And Nitrogen Fertilization Effects On Soil Surface Chemistry, A. Obour, J. D. Holman

Kansas Agricultural Experiment Station Research Reports

Long-term crop management practices can affect nutrient cycling and availability to crops. This study examined the long-term effects of nitrogen (N) fertilizer application (N rates of 0, 20, 40, and 60 lb N/a) and tillage intensity (conventional tillage (CT), reduced tillage (RT), and no-tillage (NT)) on soil phosphorus (P), micronutrients, and soil acidity in a dryland winter wheat (Triticum aestivumL.)–sorghum (Sorghum bicolorL.)–fallow cropping system. Results showed soil organic matter (SOM), iron (Fe), and zinc (Zn) concentrations were greater under NT compared to CT or RT. Similarly, NT ( 32 ppm) increased P accumulation in the upper …

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Integration Of Multi-Criteria And Nearest Neighbour Analysis With Kernel Density Functions For Improving Sinkhole Susceptibility Models: The Case Study Of Enemonzo (Ne Italy), Chiara Calligaris, Stefano Devoto, Jorge P. Galve, Luca Zini, José V. Pérez-Peña May 2017

Integration Of Multi-Criteria And Nearest Neighbour Analysis With Kernel Density Functions For Improving Sinkhole Susceptibility Models: The Case Study Of Enemonzo (Ne Italy), Chiara Calligaris, Stefano Devoto, Jorge P. Galve, Luca Zini, José V. Pérez-Peña

International Journal of Speleology

The significance of intra-mountain valleys to infrastructure and human settlements and the need to mitigate the geo-hazard affecting these assets are fundamental to the economy of Italian alpine regions. Therefore, there is a real need to recognize and assess possible geo-hazards affecting them. This study proposes the use of GIS-based analyses to construct a sinkhole susceptibility model based on conditioning factors such as land use, geomorphology, thickness of shallow deposits, distance to drainage network and distance to faults. Thirty-two models, applied to a test site (Enemonzo municipality, NE Italy), were produced using a method based on the Likelihood Ratio (λ) …

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Possible Evaporite Karst In An Interior Layered Deposit In Juventae Chasma, Mars, Davide Baioni, Mario Tramontana May 2017

Possible Evaporite Karst In An Interior Layered Deposit In Juventae Chasma, Mars, Davide Baioni, Mario Tramontana

International Journal of Speleology

This paper describes karst landforms observed in an interior layered deposit (ILD) located within Juventae Chasma a trough of the Valles Marineris, a rift system that belongs to the Tharsis region of Mars. The ILD investigated is characterized by spectral signatures of kieserite, an evaporitic mineral present on Earth. A morphologic and morphometric survey of the ILD surface performed on data of the Orbiter High Resolution Imaging Science Experiment (HiRISE) highlighted the presence of depressions of various shapes and sizes. These landforms interpreted as dolines resemble similar karst landforms on Earth and in other regions of Mars. The observed karst …

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Vegetation Habitat Mapping Of Mammoth Cave National Park Using Multi-Date Landsat-8 Imagery And Lidar Data, Hongli Yang Apr 2017

Vegetation Habitat Mapping Of Mammoth Cave National Park Using Multi-Date Landsat-8 Imagery And Lidar Data, Hongli Yang

Steeplechase: An ORCA Student Journal

Vegetation habitat mapping can be regarded as a model predicting the geographic distribution of plant cover types from mapped environmental variables. This paper discusses three environmental factors- slope, aspect and bedrock geology that determined different habitat types in Mammoth Cave National Park. The variation of aspect and slope can largely determine the amount of solar radiation and water available to vegetation, which influences the contrasting habitat types formed in a long term. Bedrock geology, one of the most influential factor in the study area, primarily controls the soil types and drainage conditions that support the various habitat types. The habitat …

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Timing Of Speleogenesis Of Las Karmidas Cave (Mexico): First Description Of Pseudokarst Developed In Ignimbrite, María Del Pilar Aliaga-Campuzano, Rafael López-Martínez, Pablo Dávila-Harris, Ramón Espinasa-Pereña, Adriana Espino Del Castillo, J.P. Bernal Apr 2017

Timing Of Speleogenesis Of Las Karmidas Cave (Mexico): First Description Of Pseudokarst Developed In Ignimbrite, María Del Pilar Aliaga-Campuzano, Rafael López-Martínez, Pablo Dávila-Harris, Ramón Espinasa-Pereña, Adriana Espino Del Castillo, J.P. Bernal

International Journal of Speleology

Las Karmidas Cave (Puebla State, Mexico) is an unusual type of pseudokarstic cavity generated by piping and erosive processes within the contact of a diamicton and an overlying Quaternary ignimbrite. Morphological evidence suggests that the cave was developed in two stages: a phreatic stage and a vadose stage. The latter was characterized by the formation of carbonate speleothems. The absolute upper-age limit for the cave (168 +7.1/-7.5 ka) was established by U-Th dating of zircons grains extracted from the overlying ignimbrite, whilst a minimum age for the transition from a phreatic to vadose regime (95.6 ± 2.1 ka) was constrained …

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Concentration Of Metals Associated With The Native Copper Deposits Of Northern Michigan, Daniel R. Blakemore, C. Renee Sparks, Nathaniel H. Bos Apr 2017

Concentration Of Metals Associated With The Native Copper Deposits Of Northern Michigan, Daniel R. Blakemore, C. Renee Sparks, Nathaniel H. Bos

The Compass: Earth Science Journal of Sigma Gamma Epsilon

The Keweenaw Peninsula of northern Michigan is home to the largest accumulation of native copper in the world. Native copper deposits are hosted in the 1.1 billion-year old midcontinent rift which extends from Kansas, up through Lake Superior, around into lower Michigan, but is only exposed in the Keweenaw region. Native copper is found in the vesicular and brecciated flow tops of the volcanism associated with this rift, within the interflow conglomerate that developed in-between individual flows, and also minor native copper deposits are found with the copper sulfide deposits in the Nonesuch Shale. The purpose of this study was …

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Evaporite Karst Geohazards In The Delaware Basin, Texas: Review Of Traditional Karst Studies Coupled With Geophysical And Remote Sensing Characterization, Kevin W. Stafford, Wesley A. Brown, Jon T. Ehrhart, Adam F. Majzoub, Jonathan D. Woodard Apr 2017

Evaporite Karst Geohazards In The Delaware Basin, Texas: Review Of Traditional Karst Studies Coupled With Geophysical And Remote Sensing Characterization, Kevin W. Stafford, Wesley A. Brown, Jon T. Ehrhart, Adam F. Majzoub, Jonathan D. Woodard

International Journal of Speleology

Evaporite karst throughout the Gypsum Plain of west Texas is complex and extensive, including manifestations ranging from intrastratal brecciation and hypogene caves to epigene features and suffosion caves. Recent advances in hydrocarbon exploration and extraction has resulted in increased infrastructure development and utilization in the area; as a result, delineation and characterization of potential karst geohazards throughout the region have become a greater concern. While traditional karst surveys are essential for delineating the subsurface extent and morphology of individual caves for speleogenetic interpretation, these methods tend to underestimate the total extent of karst development and require surficial manifestation of karst …

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Structural Features Of The Ni̇ğde Massi̇f İn The Çamardi (Ni̇ğde) Di̇stri̇ct, Ramazan Demi̇rci̇oğlu, Yaşar Eren Apr 2017

Structural Features Of The Ni̇ğde Massi̇f İn The Çamardi (Ni̇ğde) Di̇stri̇ct, Ramazan Demi̇rci̇oğlu, Yaşar Eren

Bulletin of the Mineral Research and Exploration

In the Çamardı (Niğde) region, Niğde Massif is composed of Palaeozoic-Mesozoic marble, gneiss and quartzite. The high-grade metamorphic rocks of the Massif are cut by Cretaceous granodiorites. These rocks are unconformably overlain by Paleocene-Eocene low-grade metamorphic rocks. Upper Cretaceous-Eocene flysch and island-arc type volcanic rocks tectonically overlie the above mentioned units. The youngest rocks in the area are Oligocene-Quaternary continental sedimentary and volcanic rocks. The rocks of the massif have been subjected to at least four ductile deformational events, that are designated as D1, D2, D3 and D4. The first phase of deformation produced recumbent isoclinal folds (F1-F2 folding) which …

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An Approach To Coast Edge Line At The Eastern Antalya Marginal-Marine Sea Sides, Muhittin Görmüş, Levent Başayi̇ği̇t, Ahmet Uysal Apr 2017

An Approach To Coast Edge Line At The Eastern Antalya Marginal-Marine Sea Sides, Muhittin Görmüş, Levent Başayi̇ği̇t, Ahmet Uysal

Bulletin of the Mineral Research and Exploration

In this study, geological and geomorphological studies having the solution approaches for the coast edge line problem at the marginal-marine environments were realised and some solutions were proposed. The eight following locations were chosen: South of Lara Main Road (1), Aksu River Exit (2), Acısu Stream-2 (3), Ağılısu Stream Exit (4), Köprüçay Exit (5), seashore at the south of Evrenseki (6), seashore at the east of Side (7) and Kızılot (8). Past and new images of the Google Earth satellite views, topographic maps and aerial views; lithological-sedimentological observations, fauna data in sediments, plant cover, artificial structures, previous literature and related …

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One Of The Mai̇n Neotectoni̇c Structures İn The Nw Central Anatoli̇a: Beypazari Bli̇nd Thrust Zone And Related Fault-Propagati̇on Folds, Gürol Seyi̇toğlu, Korhan Esat, Bülent Kaypak Apr 2017

One Of The Mai̇n Neotectoni̇c Structures İn The Nw Central Anatoli̇a: Beypazari Bli̇nd Thrust Zone And Related Fault-Propagati̇on Folds, Gürol Seyi̇toğlu, Korhan Esat, Bülent Kaypak

Bulletin of the Mineral Research and Exploration

This paper suggests that the structure known as “Beypazarı flexure / monocline” in the Turkish geology literature should be named as “Beypazarı fault-propagation folds”. Beypazarı, Kilci and Başören blind thrusts together with Erenler back thrust constitute the Beypazarı Blind Thrust Zone which is an active neotectonic structure as indicated by earthquake activity. NW-SE contraction created by the interaction between the North Anatolian Fault Zone, the Kırıkkale-Erbaa Fault Zone and the Eskişehir Fault Zone produced the Eldivan-Elmadağ Pinched Crustal Wedge, the Abdüsselam Pinched Crustal Wedge and the Beypazarı Blind Thrust Zone. These structures take up the internal deformation of the Anatolian …

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Strati̇graphy And Structure Of The Southeastern Part Of Pi̇ramagroon Anti̇cli̇ne, Sulai̇mani̇ Area, Northeast Iraq, Kamal Haji Kari̇m, Polla Azad Khanaqa Apr 2017

Strati̇graphy And Structure Of The Southeastern Part Of Pi̇ramagroon Anti̇cli̇ne, Sulai̇mani̇ Area, Northeast Iraq, Kamal Haji Kari̇m, Polla Azad Khanaqa

Bulletin of the Mineral Research and Exploration

The Piramagroon anticline (or Pira Magrun Mountain) elongates directly to the northwest of Sulaimani city, Northeast Iraq and its southeastern part contains two other anticlines, named Harmetool and Yakhyian anticlines in addition to their complementary synclines and many other smaller folds. The anticline has experienced intense search for oil in the last few years and a well is drilled to a depth of 3000 meters but, any evidence of oil or gas wasn’t found. In the present study, the southeastern part has been studied stratigraphically and structurally and the previous studies have been critically reviewed which may help to reason …

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The Reaction Of Physical Transformation Of The Gravity Data And Linearity Dilemma, Ertan Toker Apr 2017

The Reaction Of Physical Transformation Of The Gravity Data And Linearity Dilemma, Ertan Toker

Bulletin of the Mineral Research and Exploration

This paper consists of opinions on the article entitled as “Investigation of the Seismic Velocity Distribution and Crustal Structure of Turkey by means of Gravity Data” which was published on the page 185 of the 153rd issue of the Bulletin of Mineral Research and Exploration. Within this context, it was aimed at defining some dilemmas encountered in the article, which was targeted in the exploration of the crustal structure in plate scale by means of data sets, and informing the reader. Here, the interactive relationships of Gravity and Seismic methods of which each one are discipline of expertise will be …

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An Investigation On Single-Particle Impact Breakage Functions Of A Gold Ore By Drop-Weight Technique, Ömürden Genç Apr 2017

An Investigation On Single-Particle Impact Breakage Functions Of A Gold Ore By Drop-Weight Technique, Ömürden Genç

Bulletin of the Mineral Research and Exploration

Impact breakage functions for a gold ore from Bergama region (Turkey) was estimated based on the single-particle impact breakage distributions of particles obtained from drop weight tests. For this purpose, a modified manual version of a JK Tech drop-weight test device was used. Effect of specific comminution energy (Ecs) on impact breakage distributions were investigated. Relationship between specific comminution energy and impact breakage product fineness (t10) parameter was established. Ecs-t10 model given in the literature was successfully fitted to the breakage test results. Ecs-t10 impact breakage model for the gold ore was proposed to be used in breakage function estimation. …

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Permeability Of Savcibey Dam (Bi̇leci̇k) Axis Location And Design Of Grout Curtain, Mustafa Can Canoğlu, Bedri Kurtuluş Apr 2017

Permeability Of Savcibey Dam (Bi̇leci̇k) Axis Location And Design Of Grout Curtain, Mustafa Can Canoğlu, Bedri Kurtuluş

Bulletin of the Mineral Research and Exploration

This study comprise the design of the planned grout curtain in Savcıbey Dam (Söğüt/Bilecik) in order to provide impermeability along the dam axis. Within the context of field studies, engineering geology map was generated, ground investigation drilling was realized and permeability tests were performed. Within the field studies, the joint conditions of the geological units (Triassic aged Bozüyük Metamorphic schists) under the dam axis and its effect on permeability was observed considering the positions of the discontinuities with regard to the dam axis location. Orientation of discontinuities generally have strikes changing between N – S and NNE – SSW. 5 …

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Sodium Sulfate (Glauberite-Bloedite) - Halite Association İn The Tertiary (Upper Miosene - Pliocene) Katrandedetepe Formation, Ereğli̇-Bor Basin, Turkey, Gökhan Kadinkiz, Mustafa Karakaş, Mehmet Pekgöz, Abdurrahman Murat Apr 2017

Sodium Sulfate (Glauberite-Bloedite) - Halite Association İn The Tertiary (Upper Miosene - Pliocene) Katrandedetepe Formation, Ereğli̇-Bor Basin, Turkey, Gökhan Kadinkiz, Mustafa Karakaş, Mehmet Pekgöz, Abdurrahman Murat

Bulletin of the Mineral Research and Exploration

This study covers the investigations related to the glauberite-halite minerals detected in Neogene deposits of the Ereğ- li-Bor Basin in the Central Anatolia. The basin consists of Paleozoic basement rocks, the unconformably overlying Paleocene-Eocene-Oligocene marine sedimentary and volcano-sedimentary rocks, and the Lower Miocene-Pliocene lake deposits at the top which unconformably overlie all underlying layers. In the study, core drillings related to the determination of geological characteristics and investigation of the mineral potential of buried salt deposits were carried out in the Ereğli-Bor basin. As a result of drillings carried out, glauberite-bloedite, halite and bituminous shale horizons, which possess significant thickness …

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Investigation Of Güllük (Muğla) Wetland By Stable Isotopes (Δ18o, Δd), Melis A. Somay Apr 2017

Investigation Of Güllük (Muğla) Wetland By Stable Isotopes (Δ18o, Δd), Melis A. Somay

Bulletin of the Mineral Research and Exploration

Wetlands play an important role in the hydrologic cycle. This investigation was completed to determine the origin of waters and recharge-discharge areas using stable isotopes (δ18O and δD) which are fingerprints of the water in Güllük (Muğla) wetland. This area is important both economically and in terms of aquaculture environment in Turkey. Sample locations were selected from not only wetlands but also the possible recharge area that consists of karstic springs and streams. EC (Electrical Conductivity) of the waters range between 5080-41000 µS/cm, except streams. δ18O and δD contents of the samples ranged from -6.00‰ to 0.50‰ and from -29.1‰ …

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Sedimentology, Mineralogy And Origin Of The First Discover Magnesitedolomite Belt In Ma’Rib District, Sw Arabian Peninsula, Saad Zeki Abdulkadi̇r Ai̇-Mashaiki Apr 2017

Sedimentology, Mineralogy And Origin Of The First Discover Magnesitedolomite Belt In Ma’Rib District, Sw Arabian Peninsula, Saad Zeki Abdulkadi̇r Ai̇-Mashaiki

Bulletin of the Mineral Research and Exploration

Magnesite mineralization of high purity was discovered and described herein for the first time from metamorphosed folded belt from Al-Thanyiah locality in Rub’Al-Khali sector, 360 km east of Sana’a City, northwest Yemen. The magnesite-metamorphic belt, belonging to the Precambrian/Neoproterozoic age? comprises thrust belt, which trends generally N-S direction. Magnesite mineralization was identified in an extended carbonate-metamorphic belt for several tens of kilometers cf. 31 km and occurred in association with 8 stratigraphic units. The thicknesses of pure magnesite bearing units are variable and ranges from 20 to 60 m, associated with dark green chlorite-schist with intersecting huge ultrabasic intrusions. Geochemical, …

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Maastrichtian - Selandian Planktonic Foraminifera Biostratigraphy And Palaeoecological Interpretation Of Akveren Formation In Bartin Area (Western Black Sea, Turkey), Caner Kaya Özer Apr 2017

Maastrichtian - Selandian Planktonic Foraminifera Biostratigraphy And Palaeoecological Interpretation Of Akveren Formation In Bartin Area (Western Black Sea, Turkey), Caner Kaya Özer

Bulletin of the Mineral Research and Exploration

The changes in planktonic foraminifera assemblages were studied in two sections composed of clayey limestone, limestone, claystone and marl in the Akveren Formation in the Bartın Province. Pseudoguembelina palpebra, Racemiguembelina fructicosa, Abathomphalus mayaroensis and Pseudoguembelina hariaensis biozones in the Maastrichtian and Parvularugoglobigerina eugubina, Glomobanomalina compressa/Praemurica uncinata, Praemurica uncinata and Morozovella angulata biozones in the Paloecene were determined using planktonic genus and species identified in these sections. Paleoecological interpretations in this study were completed by using the relative abundances of paleoecological species identified in these biozones. The abundance of Rugoglobigerina spp., Heterohelix globulosa, Pseudoguembelina spp., species that tolerated changes in sea …

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The Importance Of Amount Of Settlement In Determining The Bearing Capacity Of Soils, Selçuk Alemdağ, Aslıhan Ci̇noğlu, Elif Gacener Apr 2017

The Importance Of Amount Of Settlement In Determining The Bearing Capacity Of Soils, Selçuk Alemdağ, Aslıhan Ci̇noğlu, Elif Gacener

Bulletin of the Mineral Research and Exploration

In this study, it is aimed to determine safe bearing capacity of soils, which are out cropped around Tamzi and Akcakale villages located in Gumushane, providing allowable settlement conditions for an optimum foundation design. To define the geotechnical properties of soils, three trenches were dug and two seismic refraction with two Multichannel Spectral Analysis of Surface Waves (MASW) were carried out in each research area. Sieve analyses, shear box tests, triaxial compression tests were carried out on disturbed and undisturbed samples taken from the trenches. Seismic velocities of the soils are determined by seismic refraction and MASW methods. While determining …

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