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LAPSE:2023.20072v1

Controlling Factors for Organic Carbon Burial in the Late Cretaceous Nenjiang Formation of the Songliao Basin, NE China

Lu Niu, Yuan Gao, He Huang, Xing Tian, Tian Dong, Qian Yang, Xiaomeng Cao, Chengshan Wang

March 10, 2023

Abstract
The Songliao Basin (SLB) is a large terrestrial petroliferous basin located in northeastern China. The Nenjiang Formation represents excellent hydrocarbon source rocks for the Daqing oil field. Previous studies have indicated that the oil shale intervals from the first (K2n1) and second (K2n2) members of the Nenjiang Formation were formed in different depositional settings. In this study, we provide a new high-resolution (1 m interval) record from SK-1s core and compile three sets of published datasets from two drilling holes (Zk3389 and LY-1) and a composite outcrop section. According to the total organic carbon (TOC) chemostratigraphy, we have divided three variation cycles spanning from K2n1 to K2n2 and detected three potential oil shale intervals in the Nenjiang Formation. Combined with the productivity, salinity, and oxygenation proxies, we discuss the paleolimnological environmental changes during deposition of the Nenjiang Formation. Our new and compiled records support the model that excellent preservation conditions were associated with the formation of organic-rich sediments in the K2n1, while the productivity was the major controlling factor for organic matter enrichment in the K2n2.

Record ID

LAPSE:2023.20072v1

Keywords

Nenjiang Formation, oil shale, organic matter enrichment, Songliao Basin

Subject

Energy Systems

Suggested Citation

Niu L, Gao Y, Huang H, Tian X, Dong T, Yang Q, Cao X, Wang C. Controlling Factors for Organic Carbon Burial in the Late Cretaceous Nenjiang Formation of the Songliao Basin, NE China. (2023). LAPSE:2023.20072v1

Author Affiliations

Niu L: State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences (Beijing), Beijing 100083, China; School of Earth Science and Resources, China University of Geosciences (Beijing), Beijing 100083, China
Gao Y: State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences (Beijing), Beijing 100083, China; School of Earth Science and Resources, China University of Geosciences (Beijing), Beijing 100083, China [ORCID]
Huang H: State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences (Beijing), Beijing 100083, China; School of Earth Science and Resources, China University of Geosciences (Beijing), Beijing 100083, China
Tian X: State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences (Beijing), Beijing 100083, China; School of Earth Science and Resources, China University of Geosciences (Beijing), Beijing 100083, China
Dong T: State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences (Beijing), Beijing 100083, China; School of Earth Science and Resources, China University of Geosciences (Beijing), Beijing 100083, China
Yang Q: State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences (Beijing), Beijing 100083, China; School of Earth Science and Resources, China University of Geosciences (Beijing), Beijing 100083, China
Cao X: Laboratory for Marine Geology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
Wang C: State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences (Beijing), Beijing 100083, China; School of Earth Science and Resources, China University of Geosciences (Beijing), Beijing 100083, China

Journal Name

Energies

Volume

Issue

First Page

4783

Year

2021

Publication Date

2021-08-06

DOI:

https://doi.org/10.3390/en14164783