Title :

New Insight into Factors Controlling Organic Matter Distribution in Lower Cambrian Source Rocks: A Study from the Qiongzhusi Formation in South China

Author(s) :

Zheng, Shucan [Auteur]
China University of Geosciences [Wuhan] [CUG]
Feng, Qinglai [Auteur]
China University of Geosciences [Wuhan] [CUG]
Tribovillard, Nicolas [Auteur]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Servais, Thomas [Auteur]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Zhang, Yan [Auteur]
China University of Geosciences [Wuhan] [CUG]
Gao, Bo [Auteur]
Shengli Oil Field [SINOPEC]
Chinese Academy of Sciences [Beijing] [CAS]

Journal title :

Journal of Earth Science

Pages :

181-194

Publisher :

China University of Geoscience

Publication date :

2020-02

ISSN :

1674-487X

English keyword(s) :

organic-rich sediment
organic matter distribution
type and origin of OM
biogenic silica
Lower Cambrian

HAL domain(s) :

Planète et Univers [physics]

English abstract : [en]

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. ...
Show more >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.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

• Évolution, Écologie et Paléontologie (Evo Eco Paleo) - UMR 8198

Source :

Harvested from HAL