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Full-Text Articles in Physical Sciences and Mathematics
Stratigraphy And Volcanic Facies In Khao Noi Area, Tha Takiap District, Chachoengsao Province, Amporn Chaikam
Stratigraphy And Volcanic Facies In Khao Noi Area, Tha Takiap District, Chachoengsao Province, Amporn Chaikam
Chulalongkorn University Theses and Dissertations (Chula ETD)
The Khao Noi volcanics is in Tha Takiap district, Chachoengsao province, eastern Thailand. This volcanics is a part of the Lampang volcanic belt, a potential host rocks for mineralizations, especially gold and antimony epithermal style deposits. Based on field investigation, drill core logging, and petrographic study, the Khao Noi host volcanic sequence has a thickness of at least 150 meters. The sequence can be divided into three units, namely 1) Sedimentary unit (Unit 1), 2) Mafic-intermediate volcanic unit (Unit 2), and 3) Felsic volcanic unit (Unit 3). Unit 1 forms as a basement of the Khao Noi volcanic sequence and …
Hydromorphological Changes Of Chi River, Mueang District, Khon Kaen Province, Pawat Wattanachareekul
Hydromorphological Changes Of Chi River, Mueang District, Khon Kaen Province, Pawat Wattanachareekul
Chulalongkorn University Theses and Dissertations (Chula ETD)
This thesis focuses on the analysis of hydrology coupled with geomorphology for river management such as flood mitigation and river restoration. Morphological Quality Index (MQI) is used for assessing hydro-morphological conditions from part of the Chi River (67 km long) at Khon Kaen province, a major river in north-eastern Thailand. This study area has been suffering from unexpected and repeated flooding. MQI is applied to evaluate the degree of hydro-morphological alteration in terms of relative scores (from 0 to 1). Basically, in case that MQI score equals 1, it means the area has no any alteration. On the other hand, …
Stratigraphy And Geochemistry Of Rock Salt From Maha Sarakham Formation In Changwat Chaiyaphum, Northeastern Thailand, Pranot Rattana
Stratigraphy And Geochemistry Of Rock Salt From Maha Sarakham Formation In Changwat Chaiyaphum, Northeastern Thailand, Pranot Rattana
Chulalongkorn University Theses and Dissertations (Chula ETD)
Maha Sarakham Formation is one of massive potash deposits in the Khorat Plateau extending from northeastern of Thailand to central of Lao PDR. Maha Sarakham Formation consists of three rock salt members (the lower, middle and upper members) interbedded with claystone. Potash minerals are associated with the thick bed of rock salt in the upper part of lower salt member. Previous studies are still under discussion on whether the origin of rock salt from marine or non-marine (hydrothermal origin and mixed fluids) deposit. The purpose of this study is to analyze the origin of rock salt based on elemental compositions …
Geology And Petrochemistry Of Volcanic Rocks In The Lam Sonthi Area, Lop Buri Province, Saowaphap Uthairat
Geology And Petrochemistry Of Volcanic Rocks In The Lam Sonthi Area, Lop Buri Province, Saowaphap Uthairat
Chulalongkorn University Theses and Dissertations (Chula ETD)
Lam Sonthi area is in Lop Buri province, central Thailand. Stratigraphically, the geology of the area consists of five rocks units; Unit I: Khao Ruak siltstone which is correlated to Khao Luak Formation (Early Permian), Unit II: Khao Phaeng Ma conglomerate, Unit III: Khao Ruak volcanics, Unit IV: Lam Sonthi polymictic conglomerate, and Unit V: Kuttaphet sandstone which is correlated to Phu Kradung Formation (Early Jurassic). In addition, the volcanic rocks, which are named as Kuttaphet volcanics and Khok Khli volcanics, could be found in the top of Unit IV as the polymictic intermediate breccia. Petrographic classification identifies the volcanic …
Fusulinacean Biostratigraphy And Carbonate Petrography Of Khao Khwang And Khao Khad Formations, Saraburi Province, Sutharat Sirot
Fusulinacean Biostratigraphy And Carbonate Petrography Of Khao Khwang And Khao Khad Formations, Saraburi Province, Sutharat Sirot
Chulalongkorn University Theses and Dissertations (Chula ETD)
These research purposes are to study petrography, fusulinids assemblage and age and study biostratigraphy correlation of Khao Khwang and Khao Khad Formations, Saraburi province. The fusulinids from the study area belong to 5 families, 11 subfamilies, 15 genera and 15 species including Robustoschwagerina, Yangchienia, Parafusulina loeyensis, Parafusulina gigantea, Laosella edoensis, Pseudofusulina, Chusenella chihsiaensis, Chusenella (Chusenella) shengi, Verbeekina verbeeki, Misellina, Pseudodoliolina, Thailandina buravasi, Neoschwagerina megasphaerica, Colania douvillei, Lepidolina shiraiwensis, Presumatrina ciryi, Sumatrina annae and Sumatrina cf. longissima. These fusulinids indicated that Khao Khad Formation was deposited oldest in Sakmarian to Yakhtashian and youngest in Midian age and Khao Khwang Formation was …
Petrochemistry Of Intrusive Rocks In Tha Takiap District, Chachoengsao Province, Thanaz Watcharamai
Petrochemistry Of Intrusive Rocks In Tha Takiap District, Chachoengsao Province, Thanaz Watcharamai
Chulalongkorn University Theses and Dissertations (Chula ETD)
In Thailand, alkaline granitoid rocks are less widespread and crop out in less extend as small stocks or plutons. The study areas are located in 2 vicinities of Tha Takiap and Mae Yan areas which respectively are a part of the eastern and central granite belts. Petrographic study of the rocks from both areas show that alkaline feldspar is the principal mineral phase with small amount of quartz and plagioclase. Compositionally, the investigated rocks fall in the range of alkali feldspar syenite to quartz-alkali feldspar syenite. High concentration of Na2O+K2O and high ratio of FeOtot/(FeOtot+MgO) vs SiO2 indicate that most …
Mineral Inclusions In Sapphire From Basalt - Related Deposit In Southern Vietnam, Vu Doan Thi Anh
Mineral Inclusions In Sapphire From Basalt - Related Deposit In Southern Vietnam, Vu Doan Thi Anh
Chulalongkorn University Theses and Dissertations (Chula ETD)
Sapphires in Southern Vietnam have been discovered in alluvial deposit derived from Cenozoic basalts. Sample collections for this study were taken from the most significant gem fields including Pleiku, Dak Nong, Di Linh, Binh Thuan, and Krong Nang. Several syngenetic mineral inclusions in these sapphires were classified as alkali feldspar, zircon, ferrocolumbite, pyrochlore, and iron oxides. Mineral chemical characteristics of these inclusions appearred to have evolved from alkaline felsic suite. Oxide mineral inclusions occurred in sapphire included hercynite, wüstite, and ilmenite. Ilmenite ranged in composition between Il49-54He34-40Mt7-10 and Il24-30He36-38Mt35-40 falling in ilmenite-hematite series. Wüstite with nonstoichiometry, (Fe2+0.3-0.9)(Ti3+<0.179Al3+≤0.6Cr3+<0.1 Fe3+≤0.46)£≤0.23O, was usually associated with hercynite inclusion clearly indicating cogenetic sapphire formation. Wüstite and sapphire appeared to have formed from the breakdown reaction of hercynite (hercynite = sapphire+wüstite). Titanohematite series and titanomagnetite series might have crystallized during iron-titanium reequilibration via subsolidus exsolution. U-Pb geochronology of zircon inclusion in these sapphires yielded between 35.5 ± 1.6 Ma (~35 Ma) and 14.73 ± 0.29 Ma (~15 Ma) for Krong Nang sapphire, 5.94 ± 0.13 Ma (~6 Ma) for Binh Thuan and Dak Nong sapphire, and 5.491 ± 0.077 Ma (~5.5 Ma) for Di Linh sapphire. These age constraints relate to the main Cenozoic basaltic eruptions in this region. Crystallization temperature of sapphire formation was estimated at about 561- 7810C using Ti-in-zircon thermometry.