نتایج جستجو برای: sediment geochemistry
تعداد نتایج: 42812 فیلتر نتایج به سال:
The basic differences between the application of till geochemistry in Finland and Canada are that (1) there is far less integration of glacial geology and geochemical exploration in North America than in Finland and (2) the application of new glacial sedimentology models and examination of basic assumptions about the history and dynamics of Scandinavian ice sheets are less emphasized in Scandin...
1 CAS Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, The Chinese Academy of Sciences, Guangzhou 510640, China 2 State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, The Chinese Academy of Sciences, Guangzhou 510640, China 3 Research School of Earth Sciences, The Australian National University, Canberra, ACT 0200, Australia Isotop...
The Central Asian Orogenic Belt (CAOB) is the world’s largest accretionary orogenic belt, and its formation related to closure of Paleo-Asian Ocean (PAO). However, time style PAO remain controversial. To address these issues, this paper presents zircon U-Pb dating, whole-rock geochemistry Lu-Hf isotope analyses volcanic rocks in Faku-Kaiyuan area on northern margin North China Craton. results s...
Sediment quality assessment is often hindered by the lack of agreement between chemical and biological lines of evidence. One limitation is that the bulk sediment toxicant concentration, the most widely used chemical parameter, does not always represent the bioavailable concentration, particularly for hydrophobic organic compounds (HOCs) in highly contaminated sediments. In this study, a porewa...
Abstract Microbialites accrete where environmental conditions and microbial metabolisms promote lithification, commonly through carbonate cementation. On Little Ambergris Cay, Turks Caicos Islands, mats occur widely in peritidal environments above ooid sand but do not become lithified or preserved. Sediment cores porewater geochemistry indicated that aerobic respiration sulfide oxidation inhibi...
چکیده ندارد.
Abstract We used a multidisciplinary approach integrating major, trace and rare earth element geochemistry, mineralogy of rocks sediments along with the ionic composition water reservoirs Admiralty Bay, King George Island, to evaluate record water-rock interactions under Maritime Antarctic conditions. Our results showed that compositions streams meltwaters predominantly reflect atmospheric inpu...
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