Results 11 to 20 of about 288,749 (288)

Application of the Data on δ¹³C and δ¹⁸O of Carbonates for the Study of Unconventional Reservoirs on the Example of the Bazhenov Source Rocks, Western Siberia, Russia

Geosciences, 2021
This paper addresses potential application of data on stable carbon and oxygen isotope composition of carbonates for study of organic rich source rocks on the example of the Late Jurassic–Early Cretaceous Bazhenov Formation (West Siberian petroleum basin,
Anna Yurchenko, Andrey Voropaev, Elena Kozlova, Nikita Morozov, Mikhail Spasennykh   +4 more
doaj   +1 more source

Study on Separation of Polycyclic Aromatic Hydrocarbons in Soils for Compound-specific Carbon Isotope Analysis

Yankuang ceshi, 2021
BACKGROUND Tracing the source of polycyclic aromatic hydrocarbons (PAHs) by the compound-specific carbon isotope is becoming increasingly popular. For precise carbon isotope analysis, a pretreatment process is required to reduce co-outflow and unresolved
XIE Man-man, LIU Mei-mei, WANG Shu-xian, LING Yuan, SUN Qing   +4 more
doaj   +1 more source

Limited evidence of C4 plant consumption in mound building Macrotermes termites from savanna woodland chimpanzee sites.

PLoS ONE, 2021
Stable isotope analysis is an increasingly used molecular tool to reconstruct the diet and ecology of elusive primates such as unhabituated chimpanzees.
Seth Phillips, Rudolf H Scheffrahn, Alex Piel, Fiona Stewart, Anthony Agbor, Gregory Brazzola, Alexander Tickle, Volker Sommer, Paula Dieguez, Erin G Wessling, Mimi Arandjelovic, Hjalmar Kühl, Christophe Boesch, Vicky M Oelze   +13 more
doaj   +1 more source

Latest Permian carbonate carbon isotope variability traces heterogeneous organic carbon accumulation and authigenic carbonate formation [PDF]

Climate of the Past, 2017
Bulk-carbonate carbon isotope ratios are a widely applied proxy for investigating the ancient biogeochemical carbon cycle. Temporal carbon isotope trends serve as a prime stratigraphic tool, with the inherent assumption that bulk micritic carbonate ...
M. Schobben, M. Schobben, S. van de Velde, J. Gliwa, L. Leda, D. Korn, U. Struck, U. Struck, C. V. Ullmann, V. Hairapetian, A. Ghaderi, C. Korte, R. J. Newton, S. W. Poulton, P. B. Wignall   +14 more
doaj   +1 more source

The Feasibility Study of Separating Carbon Isotope by Gas Diffusion Method Using Ethanol as Processing Gas

Journal of Isotopes, 2022
As a marker for isotope tracing technology, carbon-13 is widely used and the market demand is on the rise. In order to explore the separation method of carbon-13 isotope, a gas diffusion separation experiment using ethanol as the processing gas was ...
LI Junjie;PAN Jianxiong;ZHOU Mingsheng;JIANG Dongjun;WANG Fei
doaj   +1 more source

Sequence stratigraphy, chemostratigraphy and facies analysis of Cambrian Series 2 – Series 3 boundary strata in northwestern Scotland [PDF]

, 2016
Globally, the Series 2 – Series 3 boundary of the Cambrian System coincides with a major carbon isotope excursion, sea-level changes and trilobite extinctions.
Faggetter, Luke, FAGGETTER, LUKE E., Joachimski, Michael, JOACHIMSKI, MICHAEL M., NEWTON, ROBERT J., Pruss, Sara, PRUSS, SARA B., Raine, Robert, RAINE, ROBERT J., Smith, Paul, SMITH, PAUL M., SUN, YADONG, WIDDOWSON, MIKE, Wignall, P B, WIGNALL, PAUL B.   +14 more
core   +1 more source

Carbon and Oxygen Isotope Analysis of Calcite and Dolomite Mixtures Using Selective Acid Extraction by Gasbench-IRMS [PDF]

Zhipu Xuebao, 2022
Carbonate cements formed at different stages in sandstone have different mineral compositions, structural characteristics and carbon and oxygen isotope compositions.
HAN Juan, LIU Han-bin, JIN Gui-shan, ZHANG Jian-feng, LI Jun-jie, ZHANG jia, SHI Xiao   +6 more
doaj   +1 more source

The Monterey event in the Mediterranean: A record from shelf sediments of Malta [PDF]

, 1996
Oligo-Miocene carbonate platform and shelf sediments outcropping on the Maltese Islands provide an excellent archive of the paleoceanography of the central Mediterranean.
Jacobs, E, Shields, G, Stille, P, Weissert, H   +3 more
core   +1 more source

Toarcian oceanic anoxic event: An assessment of global causes using belemnite C isotope records [PDF]

, 2005
Two hypotheses have been proposed to explain simultaneous large negative excursions (up to 7% PeeDee belemnite) in bulk carbonate (delta(13)C(carb)) and organic carbon isotope records (delta(13)C(org)) from black shales marking the Toarcian oceanic ...
Bailey, TR, McArthur, JM, Miller, KG, Rosenthal, Y, van de Schootbrugge, B, Wright, JD   +5 more
core   +1 more source

Chemical Identification of the Radioelements Produced from Carbon and Boron by Deuteron Bombardment [PDF]

, 1935
Chemical experiments were made on the radioactive substances resulting from the bombardment of carbon and boron by deuterons. Carbon is shown to yield an isotope of nitrogen and boron an isotope of carbon.
Ridenour, L. N., Shinohara, K., Yost, Don M.   +2 more
core   +1 more source