Mechanism of Organic Matter Accumulation in Residual Bay Environments: The Early Cretaceous Qiangtang Basin, Tibet
| Autor: | Xiugen Fu, Ruofei Yang, Lizeng Bian, Guang Hu, Wei Yin, Jian Cao |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Total organic carbon 010504 meteorology & atmospheric sciences Lithology General Chemical Engineering Geochemistry Energy Engineering and Power Technology 010502 geochemistry & geophysics 01 natural sciences Cretaceous chemistry.chemical_compound Fuel Technology chemistry Source rock Marl Kerogen Organic matter Oil shale Geology 0105 earth and related environmental sciences |
| Zdroj: | Energy & Fuels. 32:1024-1037 |
| ISSN: | 1520-5029 0887-0624 |
| DOI: | 10.1021/acs.energyfuels.7b02248 |
| Popis: | The controlling mechanisms for the accumulation and preservation of organic matter in residual bay environments during the transition from marine to continental settings are not well understood, although oil–gas source rocks can form in this setting. In this study, we develop a case study for the Early Cretaceous black rock series in the northern Qiangtang Basin, Tibet (i.e., the Upper Member of the Suowa Formation), by conducting a combined organic and inorganic geochemical analysis of micritic limestone, marl, and shale samples from an outcrop section. Results show that total organic carbon (TOC) contents of the studied samples are between 1.74% and 7.71%, with the organic matter being Type II/III kerogen. Of the three factors that could influence the observed TOCs and organic matter types, including paleoproductivity, preservational environment, and sedimentation rate, the preservational environment appears to be the dominant factor, independent of lithology. This is typically supported by the relative... |
| Databáze: | OpenAIRE |
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