نتایج جستجو برای: sedimentary geochemistry

تعداد نتایج: 16788  

2009
X. W. Fu X. Feng Z. Q. Dong R. S. Yin J. X. Wang Z. R. Yang H. Zhang

Atmospheric total gaseous mercury (TGM) concentrations and wet and dry deposition of mercury at a high-altitude mountain peak in south China X. W. Fu, X. Feng, Z. Q. Dong, R. S. Yin, J. X. Wang, Z. R. Yang, and H. Zhang State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China Guizhou Environmental Science Research Institut...

2010
Nguyen M. Tue Go Suzuki Agus Sudaryanto Tomohiko Isobe Shin Takahashi Tu B. Minh Pham T. K. Trang Pham H. Viet Gan Zhang Shinsuke Tanabe

Nguyen M. Tue1, Go Suzuki1, Agus Sudaryanto2, Tomohiko Isobe2, Shin Takahashi1, Tu B. Minh3, Pham T. K. Trang3, Pham H. Viet3, Gan Zhang4, Shinsuke Tanabe1 1Center for Marine Environmental Studies, Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577, Japan 2Senior Research Fellow Center, Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577, Japan 3Centre for Environmental Technology and Sustai...

2010
Z. G. Li X. Feng P. Li L. Liang S. L. Tang S. F. Wang X. W. Fu G. L. Qiu L. H. Shang

Mercury air-borne emissions from 5 municipal solid waste landfills in Guiyang and Wuhan, China Z. G. Li, X. Feng, P. Li, L. Liang, S. L. Tang, S. F. Wang, X. W. Fu, G. L. Qiu, and L. H. Shang State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China Cebam Analytical, Inc., 3927 Aurora Avenue N, Seattle, WA 98103, USA Receiv...

Journal: :Journal of South American Earth Sciences 2021

The 495 to 450 Ma Famatinian orogen, exposed throughout central and northwestern Argentina, formed from east-directed subduction under the Gondwanan margin. Sierra de Narváez Las Planchadas preserve a rare upper-crustal section of arc. New mapping, structural analysis, detrital U–Pb zircon geochronology, as well major trace element geochemistry in – are presented give comprehensive geodynamic p...

2003
Scott M. McLennan

Terrestrial planetary surfaces, other than Earth, are overwhelmingly basaltic in character. Because of this, among the most intriguing and significant results from recent studies of Mars are the occurrences of high-silica rocks at the Pathfinder site and orbital thermal emission spectroscopy evidence for a global petrological dichotomy with andesites dominating the entire northern hemispheric p...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2012
Jens Kallmeyer Robert Pockalny Rishi Ram Adhikari David C Smith Steven D'Hondt

The global geographic distribution of subseafloor sedimentary microbes and the cause(s) of that distribution are largely unexplored. Here, we show that total microbial cell abundance in subseafloor sediment varies between sites by ca. five orders of magnitude. This variation is strongly correlated with mean sedimentation rate and distance from land. Based on these correlations, we estimate glob...

Journal: :Astrobiology 2011
John Grotzinger David Beaty Gilles Dromart Sanjeev Gupta Mitch Harris Joel Hurowitz Gary Kocurek Scott McLennan Ralph Milliken Gian Gabrielle Ori Dawn Sumner

Processes that operate at planetary surfaces have the potential to record a history of planetary evolution in the form of sedimentary rocks. This is important because our experience on Earth shows that sediments and sedimentary rocks are the dominant archive of high-resolution proxies of present and past tectonic, climatic, and biological processes. Our understanding of the evolution of Earth’s...

Journal: :Marine geology 1986
J C Walker

Time resolved data on the carbon isotopic composition of carbonate minerals and the sulfur isotopic composition or sulfate minerals show a strong negative correlation during the Cretaceous. Carbonate minerals are isotopically heavy during this period while sulfate minerals are isotopically light. The implication is that carbon is being transferred from the oxidized, carbonate reservoir to the r...

Journal: :Lithos 2021

The Proto-Tethys Ocean existed from the Neoproterozoic through early Paleozoic during breakup of Rodinia and was closed with subduction accretion numerous East Asian blocks. North Qinling Orogenic Belt is thought to have formed upon closure Kuanping between China Craton Block. However, timing this widely debated Paleozoic. To date, controversy remains as a barrier in understanding ocean-contine...

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