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- Title
New Insight into Factors Controlling Organic Matter Distribution in Lower Cambrian Source Rocks: A Study from the Qiongzhusi Formation in South China.
- Authors
Zheng, Shucan; Feng, Qinglai; Tribovillard, Nicolas; Servais, Thomas; Zhang, Yan; Gao, Bo
- Abstract
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.
- Subjects
CHINA; ORGANIC compounds; MARINE sediments; CARBON cycle; QUANTITATIVE research
- Publication
Journal of Earth Science, 2020, Vol 31, Issue 1, p181
- ISSN
1674-487X
- Publication type
Article
- DOI
10.1007/s12583-019-1240-y