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Full-Text Articles in Physical Sciences and Mathematics
Acquisition Of An Automated Powder X-Ray Diffraction System, Charles V. Guidotti, Edward S. Grew, Martin Yates
Acquisition Of An Automated Powder X-Ray Diffraction System, Charles V. Guidotti, Edward S. Grew, Martin Yates
University of Maine Office of Research Administration: Grant Reports
This grant provides $70,295 as one-half support of the costs of acquiring a state-of-the-art powder X-ray diffractometer (XRD) that will be housed in a newly constructed Global Sciences building on the Orono campus of the University of Maine. This acquisition will allow these PI's to continue their internationally recognized research programs in petrologic mineralogy including studies of the phase equilibria of solid solutions in metamorphic rocks and borosilicates. The characterization of both structural properties and mineralogic identification of unknowns is fundamental to these researchers and the establishment of a modern XRD facility at the University of Maine will benefit a …
Capstone Experience For Geoscience Students At The University Of Maine: Integrating Fieldwork, Laboratory Analysis And Multimedia Technology In A Teamwork Environment, Daniel F. Belknap, Martin Yates
Capstone Experience For Geoscience Students At The University Of Maine: Integrating Fieldwork, Laboratory Analysis And Multimedia Technology In A Teamwork Environment, Daniel F. Belknap, Martin Yates
University of Maine Office of Research Administration: Grant Reports
This project establishes a Capstone Experience for senior undergraduate geoscience students. The major component is equipment for a networked Collaborative Computer Laboratory housed in the new sciences center. The laboratory is the major resource for an integrated course including computer, field work, laboratory, analytical, and publishing experiences for undergraduate seniors in geology and anthropology. This Capstone Experience has a strong interdisciplinary component (geology, environmental sciences, and anthropology) and involves other universities and K 12 students. This project focuses on Maine and neighboring regions and builds on the strengths of the university and opportunities provided by Maine's geological and geographic setting. …
Collaborative Research: Long Records Of Paleoclimate From Florida, George L. Jacobson, Heather Almquist
Collaborative Research: Long Records Of Paleoclimate From Florida, George L. Jacobson, Heather Almquist
University of Maine Office of Research Administration: Grant Reports
Long Records of Paleoclimate from Florida Recent research on a continuous 50,000-year sediment record from eastern North America has revealed a striking correlation between Heinrich events (large surges in flow of ice streams feeding from the Laurentide ice sheet into the North Atlantic) and major changes in vegetation in peninsular Florida. These events are expressed at Lake Tulane, Florida, as abrupt shifts between pine-dominated and oak-dominated communities, which likely correspond with times of moist climate alternating with periods of extreme drought. Those results suggest that the Heinrich events involved important changes in ocean-atmosphere circulation, and thus forcing other than internal …
Poc Production And Export In The Indian Ocean Sector Of The Southern Ocean: A Us-China Collaborative Research Program, Cynthia H. Pilskaln, Fei Chai
Poc Production And Export In The Indian Ocean Sector Of The Southern Ocean: A Us-China Collaborative Research Program, Cynthia H. Pilskaln, Fei Chai
University of Maine Office of Research Administration: Grant Reports
This proposed work is a study of the biological production and export flux of biogenic matter in response to ventilation of intermediate and deep water masses within the Polar Front zone. It is a collaborative work between the University of Maine and the Chinese Antarctic Research Expedition (CHINARE). The shipboard work is proposed for the Chinese antarctic resupply vessel off Prydz Bay in the Indian Ocean sector. In the austral Spring, this region experiences phytoplankton blooms that are thought to be the result of nutrient transport by the ventilation of intermediate and deep water masses. On an annual basis, it …
Holocene Climate In Coastal Peru: Potential Implications For Climate Dynamics During The Hypsithermal Period, James D. Wright
Holocene Climate In Coastal Peru: Potential Implications For Climate Dynamics During The Hypsithermal Period, James D. Wright
University of Maine Office of Research Administration: Grant Reports
This pilot study will analyze stable isotopes in planktic foraminifera in sediment cores off the coast of Peru for the Holocene interval. In many regions of the world the early Holocene is believed to have been a time of warmer-than modern temperatures. Data derived from Peruvian middens give conflicting evidence as to whether this period was somewhat warmer or cooler than today. The foraminiferal data should provide a record of sea surface temperatures and seasonal upwelling along coastal Peru throughout the Holocene, including the period of human coastal settlement.
Collaborative Research: The Boron Budget In High-Grade Pelitic Metamorphic Rocks: How, When And Where Does The Boron Go?, Edward Grew, Charles Guidotti, John Hughes
Collaborative Research: The Boron Budget In High-Grade Pelitic Metamorphic Rocks: How, When And Where Does The Boron Go?, Edward Grew, Charles Guidotti, John Hughes
University of Maine Office of Research Administration: Grant Reports
The proposed research is to study the mineralogy and petrology of certain carriers of boron in order to assess their role in the behavior of boron during high-grade metamorphism, migmatism and anatexis. The carriers to be studied include tourmaline, muscovite, sillimanite, kornerupine, grandidierite, and werdingite in metapelites in Western Maine. Special emphasis will be on assessing the role of aqueous fluid and anatectic melt in removing boron released by tourmaline breakdown. major element compositions will be determined by electron microprobe, Fe+2 and Fe+3 by Mossbauer spectroscopy, H in bulk samples by uranium extraction, H zoning by 15N reaction, bulk and …