Results 21 to 30 of about 70,737 (245)

Discussion on genesis of coalbed methane in Fukang Mining Area

Meikuang Anquan, 2021
The research area is Fukang Mining Area in the southern margin of Junggar Basin. The gas composition, methane carbon isotope, methane carbon isotope and carbon isotope of CO2 were tested in 10 CBM wells in the research area, and combined with the ...
HAO Huili, WANG Haichao, TIAN Jijun, YANG Shengbo, CHENG Xiaoqian
doaj   +1 more source

Isotopes in pyrogenic carbon: A review [PDF]

Organic Geochemistry, 2012
Pyrogenic carbon (PC; also known as biochar, charcoal, black carbon and soot) derived from natural and anthropogenic burning plays a major, but poorly quantified, role in the global carbon cycle. Isotopes provide a fundamental fingerprint of the source of PC and a powerful tracer of interactions between PC and the environment.
Bird, M.I., Ascough, P.L.
openaire   +2 more sources

Sedimentary organic matter from a cored Early Triassic succession, Georgetown (Idaho, USA)

Swiss Journal of Palaeontology, 2020
The plant fossil record from Lower Triassic sedimentary successions of the Western USA is extremely meager. In this study, samples from a drill core taken near Georgetown, Idaho, were analyzed for their palynological content as well as their stable ...
Elke Schneebeli-Hermann, Borhan Bagherpour, Torsten Vennemann, Marc Leu, Hugo Bucher   +4 more
doaj   +1 more source

The DIC carbon isotope evolutions during CO2 bubbling: Implications for ocean acidification laboratory culture

Frontiers in Marine Science, 2022
Ocean acidification increases pCO2 and decreases pH of seawater and its impact on marine organisms has emerged as a key research focus. In addition to directly measured variables such as growth or calcification rate, stable isotopic tracers such as ...
Hongrui Zhang, Ismael Torres-Romero, Pien Anjewierden, Madalina Jaggi, Heather M. Stoll   +4 more
doaj   +1 more source

Progress and challenges in using stable isotopes to trace plant carbon and water relations across scales [PDF]

Biogeosciences, 2012
Stable isotope analysis is a powerful tool for assessing plant carbon and water relations and their impact on biogeochemical processes at different scales.
C. Werner, H. Schnyder, M. Cuntz, C. Keitel, M. J. Zeeman, T. E. Dawson, F.-W. Badeck, E. Brugnoli, J. Ghashghaie, T. E. E. Grams, Z. E. Kayler, M. Lakatos, X. Lee, C. Máguas, J. Ogée, K. G. Rascher, R. T. W. Siegwolf, S. Unger, J. Welker, L. Wingate, A. Gessler   +20 more
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EXOTIC STRUCTURE OF CARBON ISOTOPES [PDF]

Frontiers of Collective Motions, 2003
31 pages, 19 eps ...
Suzuki, Toshio, Sagawa, Hiroyuki, Hagino, Kouichi   +2 more
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Measurements of position-specific carbon isotopic compositions in propane by on-line Gas Chromatography-Pyrolysis-Gas Chromatography-Isotope Ratio Mass Spectrometer (GC-Py-GC-IRMS) and its preliminary application

Shiyou shiyan dizhi, 2022
In this study, an on-line Gas Chromatography-Pyrolysis-Gas Chromatography-Isotope Ratio Mass Spectrometer (GC-Py-GC-IRMS) was established to conduct position-specific isotope analysis (PSIA) by enrichment of compound interested, chromatographic ...
Yuanyuan MA, Cheng TAO, Liqiang BA, Jie WANG, Jipeng LI, Luyun LI, Yongge SUN   +6 more
doaj   +1 more source

Mechanisms of carbon isotopic fractionation in the process of natural gas generation: Geochemical evidence from thermal simulation experiment

Petroleum Exploration and Development, 2020
Low maturity coal samples were taken from the Ordos Basin to conduct gold tube thermal simulation experiment in a closed system, and the characteristics of the products were analyzed to find out the fractionation mechanism of carbon isotopes and the ...
Weilong PENG, Quanyou LIU, Guoyi HU, Yue LYU, Dongya ZHU, Qingqiang MENG, Fengtao GUO, Ruoli WANG   +7 more
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Inversion Characteristics of Hydrocarbon Gases Carbon Isotopes Varying With Temperature and Implications for Shale Exploration

Frontiers in Earth Science, 2021
In order to understand the influence of source rock types and maturity on hydrocarbon gases carbon isotope change more objectively, a closed-system pyrolysis experiment was carried out on six samples from 250 to 550°C.
Yingqin Wu, Yanhong Liu, Tong Wang, Zhiyu Wang, Zhiyu Wang, Longmiao Yuan, Longmiao Yuan, Yanqin Xia   +7 more
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INTERREGIONAL CORRELATION OF THE MIDDLE FRASNIAN (UPPER DEVONOIAN) OF THE NORTH-WEST OF THE RUSSIAN PLATE AND THE EAST OF THE PECHORA PLATE: AN ECOGEOCHEMICAL ASPECT

Геодинамика и тектонофизика, 2022
The paper provides an example of the first stratigraphic application of ecogeochemical method based on the analysis of the carbon isotope values in conodont elements.
A. V. Zhuravlev
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