A NEWLY DISCOVERED SOURCE ROCK IN THE MID-LOWER ORDOVICIAN IN LOWER YANGTZE AREA

GONG Jianming; WANG Jianqiang; CHENG Qingsong; CHEN Jianwen; ZHANG Yinguo; ZHAO Qingfang; SUN Jing; LIAO Jing

doi:10.16028/j.1009-2722.2017.06005

2017 Vol. 33, No. 6

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Article navigation > Marine Geology Frontiers > 2017 > 33(6): 34-39

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GONG Jianming, WANG Jianqiang, CHENG Qingsong, CHEN Jianwen, ZHANG Yinguo, ZHAO Qingfang, SUN Jing, LIAO Jing. A NEWLY DISCOVERED SOURCE ROCK IN THE MID-LOWER ORDOVICIAN IN LOWER YANGTZE AREA[J]. Marine Geology Frontiers, 2017, 33(6): 34-39. doi: 10.16028/j.1009-2722.2017.06005

Citation:

GONG Jianming, WANG Jianqiang, CHENG Qingsong, CHEN Jianwen, ZHANG Yinguo, ZHAO Qingfang, SUN Jing, LIAO Jing. A NEWLY DISCOVERED SOURCE ROCK IN THE MID-LOWER ORDOVICIAN IN LOWER YANGTZE AREA[J]. Marine Geology Frontiers, 2017, 33(6): 34-39. doi: 10.16028/j.1009-2722.2017.06005

A NEWLY DISCOVERED SOURCE ROCK IN THE MID-LOWER ORDOVICIAN IN LOWER YANGTZE AREA

1.
Laboratory for Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266061, China
2.
Qingdao Institute of Marine Geology, Qingdao 266071, China
3.
The Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Qingdao 266071, China
4.
College of Resources and Environment, Yangtze University, Wuhan 430100, China

Received Date: 05 December 2016

Publish Date: 28 June 2017

Abstract

Abstract

The Mid-lower Ordovician usually acts as reservoir for oil and gas accumulation in the Yangtze area, However, in the southern Anhui Province, there occurs a sequence of gray black to black siliceous mudstone and carbonaceous mudstone in the Ningguo Formation of Lower Ordovician. It consists of rich graptolite and is inferred as an open sea shelf or deep sea facies. The Hule Formation of Middle Ordovician which consists of thin-layered dark grey silty mudstone and thick-layered siliceous mudstone with rich graptolite, is also deposited in a shelf to deep basin environment. The two Formations are similar in depositional features and distribution patterns with rich graptolite fossil, but the Ningguo Formation is obviously thicker than the Hule Formation. Organic geochemistry of Ningguo Formation source rocks show that the average TOC is 1.24%. According to the upwelling features, and studies on lithology, lithofacies and organic geochemistry, it is concluded that the Middle-Lower Ordovician is likely to be a medium-good source rocks deposited by upwelling flow in the southern Anhui region. Since the South Yellow Sea Basin is the major part of the Lower Yangtze, it is suggested that the research of the Middle-Lower Ordovician source rocks be strengthened in the South Yellow Sea Basin.
- Lower Yangtze /
- Mid-Lower Ordovician /
- Ningguo Formation /
- Hule Formation /
- source rocks

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References

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