New Insight into Factors Controlling Organic Matter Distribution in Lower Cambrian Source Rocks: A Study from the Qiongzhusi Formation in South China
| Autor: | Nicolas Tribovillard, Shucan Zheng, Bo Gao, Qinglai Feng, Thomas Servais, Yan Zhang |
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| Rok vydání: | 2020 |
| Předmět: |
Total organic carbon
Palynology chemistry.chemical_classification 020209 energy Earth science 02 engineering and technology Biogenic silica 010502 geochemistry & geophysics 01 natural sciences Carbon cycle Source rock chemistry 0202 electrical engineering electronic engineering information engineering General Earth and Planetary Sciences Sedimentary organic matter Sedimentary rock Organic matter Geology 0105 earth and related environmental sciences |
| Zdroj: | Journal of Earth Science. 31:181-194 |
| ISSN: | 1867-111X 1674-487X |
| Popis: | Sedimentary organic matter (OM) is a major reservoir of organic carbon in the global carbon cycle. Despite many studies, there still exist many debates on the mechanism of OM accumulation and preservation in marine sediments. We present a new field study of a Lower Cambrian shallow marine shelf sequence in the northern edge of the Yangtze Plate, China. Our results show that palynological OM and biogenic silica (Bio-Si) could be used alongside more conventional redox and paleo-productivity proxies to study the distribution of OM in marine sediments. The qualitative and quantitative study of palynological OM provides more detailed information on the nature of sedimentary organic carbon, which can be helpful in the assessment of primary productivity and OM preservation. In addition, the presence of Bio-Si stimulates the physical preservation of OM. Further analysis indicates that an increase in Bio-Si can promote OM preservation. This case-study provides insight into the intertwined factors controlling OM accumulation in the Early Cambrian. |
| Databáze: | OpenAIRE |
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