The petrological characteristics and significance of organic-rich shale in the Chang 7 member of the Yanchang Formation, south margin of the Ordos basin, central China

16Citations
Citations of this article
11Readers
Mendeley users who have this article in their library.

This article is free to access.

Abstract

The organic-rich shale of the Chang 7 member is the most important source rock in the Ordos basin. The sedimentary environment and the controlling factors of organic matter enrichment, however, are still in contention. In this investigation, the Yishicun outcrop, located on the south margin of the Ordos basin, has been considered for the study. X-ray diffraction, polarizing microscopy, field emission scanning electron microscopy and cathodoluminescence (CL) were used to investigate the petrological features of the organic-rich shale. The content of volcanic ash and the diameter of pyrite framboid pseudocrystals were measured to illustrate the relationship between oxygen level, ash content and the enrichment of organic matter. It has been found that the diameter of pyrite framboid pseudocrystals has a strong correlation with the total organic carbon, demonstrating that the redox status degree of the water column has a positive impact on the enrichment of organic matter. Additionally, with an increase in the ash content, the content of organic matter increased at first and then decreased, and reached a maximum when the ash content was about 6%, illustrating that the ash input has a double effect on the enrichment of organic matter.

References Powered by Scopus

Trace metals as paleoredox and paleoproductivity proxies: An update

3444Citations
N/AReaders
Get full text

The size distribution of framboidal pyrite in modern sediments: An indicator of redox conditions

1041Citations
N/AReaders
Get full text

Formation processes of framboidal pyrite

671Citations
N/AReaders
Get full text

Cited by Powered by Scopus

Accumulation contribution differences between lacustrine organic-rich shales and mudstones and their significance in shale oil evaluation

82Citations
N/AReaders
Get full text

Genesis of rich hydrocarbon resources and their occurrence and accumulation characteristics in the Ordos Basin

56Citations
N/AReaders
Get full text

Accumulation contribution differences between lacustrine organic-rich shales and mudstones and their significance in shale oil evaluation

54Citations
N/AReaders
Get full text

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Cite

CITATION STYLE

APA

Li, S., Zhu, R. K., Cui, J. W., Luo, Z., Cui, J. G., Liu, H., & Li, W. Q. (2019). The petrological characteristics and significance of organic-rich shale in the Chang 7 member of the Yanchang Formation, south margin of the Ordos basin, central China. Petroleum Science, 16(6), 1255–1269. https://doi.org/10.1007/s12182-019-00386-0

Readers' Seniority

Tooltip

PhD / Post grad / Masters / Doc 4

100%

Readers' Discipline

Tooltip

Earth and Planetary Sciences 5

83%

Business, Management and Accounting 1

17%

Save time finding and organizing research with Mendeley

Sign up for free