The C–S–Fe system evolution reveals organic matter preservation in lacustrine shales of Yanchang Formation, Ordos Basin, China

Zhang, Wang; Jin, Zhijun; Liu, Quanyou; Shan, Xiaocai; Liang, Xu

doi:10.1016/j.marpetgeo.2022.105734

Cited by 7 publications

(5 citation statements)

References 51 publications

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“…The study area is located in the southeast uplift of the Songliao Basin. The Lishu Fault Depression is bounded by faults trending NNE-SSW and can be divided into five structural units: Central Structural Belt, Southeast Slope Belt, Northern Slope Belt, Sangshutai Sag Belt and Sujiatun Sag Belt [12,24]. The Sangshutai Sag Belt is oriented north-south and is controlled by the Sangshutai Fault, while the other structural belts strike close to the NNE direction (Fig.…”

Section: Geological Settingmentioning

confidence: 99%

“…The Huoshiling tectonic time interval covered a period of intense volcanic activity in the Lishu Fault Depression and is marked by an abundance of volcaniclastic sedimentary rock in what was otherwise a shallow lake environment. In the Late Denglouku period, the depression in the study area gradually ceased, fault activity decreased, and sedimentary facies changed to braided river delta facies [12,[25][26][27].…”

Section: Geological Settingmentioning

confidence: 99%

“…China is not the only country with lacustrine petroleum source rocks, and much of the early work has been undertaken on the Tipton and Laney members of the Green River Formation in the Gosiute Basin in western USA [1,6,7]. To date, in China, the Shahejie Formation in the Bohai Bay Basin, the Yanchang Formation in the Ordos Basin, and the Jurassic Daanzhai Formation in the Sichuan Basin have been studied [8][9][10][11][12]. Some differences emerge in these studies, particularly in the main controlling factors of the accumulation of organic matter.…”

Section: Introductionmentioning

confidence: 99%

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The depositional settings of organic-rich shale in the faulted lacustrine basin: A case study of the Y1 Member of the Yingcheng Formation in the Songliao Basin

Lan,

Guo,

et al. 2024

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Volcanic activity is often associated with the development of faulted lacustrine basins. Organic-rich shale in such basins usually contains abundant volcanic material. The influence of volcanic input on organic-rich shale deposition in the basin studied has not been discussed in detail. Based on the ten shale samples from three wells, this study analyzed the depositional environment of the Yingcheng Formation shale in the Lishu Fault Depression area of the Songliao Basin by using interpretation of logging, total organic carbon analysis, gas chromatography mass spectrometry analysis, and trace element analysis. The impact of fault break to basement and volcanic materials on the organic matter enrichment was evaluated. The results show that the organic matter of Ying 1 (Y1), the First Member of the Yingcheng Formation, in the Lishu Fault Depression is characterized mainly by type I kerogen. The shale of the Y1 Member, having high total organic carbon content, is laterally continuous and could be considered as a potential target for shale oil exploration. The shale with high total organic carbon was deposited in a freshwater deep lake under an anoxic environment. There is a significant input of volcanic material, especially around the Su2 well near the Sangshutai Fault. This study has established a sedimentary model of organic-rich shale in the faulted lacustrine basin affected by volcanic activity, which has significance for the exploration of shale oil in faulted lacustrine basins.

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Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The depositional settings of organic-rich shale in the faulted lacustrine basin: A case study of the Y1 Member of the Yingcheng Formation in the Songliao Basin

Lan,

Guo,

et al. 2024

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“…S3(b), R 2 = 0.50). This trend has been attributed to the prevalence of anoxic environment, which is conductive to pyrite formation, meanwhile promoting the development and preservation of organic matter (Liu et al, 2021a(Liu et al, , 2021bZhang et al, 2022b). Apparently, the interplay among TOC, quartz, and pyrite contents is highly complicated.…”

Section: Multicollinearity and Limitation Of Correlation Analysismentioning

confidence: 99%

Efforts to untie the multicollinearity knot and identify factors controlling macropore structures in shale oil reservoirs

Wang,

Dong,

Jin

et al. 2024

Adv. Geo-Energy Res.

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“…The Ulan Mulun River Basin is located in the southeast region of Ordos, the south of Inner Mongolia, China (Figure 1). The river originated from the desert area of the Ikezhao League in southern Inner Mongolia [39], with a length of 132.5 km, and a drainage area of 6375 square kilometers. The elevation of the watershed ranges from 905 to 1075 m a.s.l.…”

Section: Study Areamentioning

confidence: 99%

Temporal and Spatial Changes of Ecological Environment Quality Based on RSEI: A Case Study in Ulan Mulun River Basin, China

et al. 2022

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The Ulan Mulun River Basin is an essential ecological protective screen of the Mu Us Desert and a necessary energy base in Ordos City. With the acceleration of industrialization and urbanization, human activities have caused enormous challenges to the local ecological environment. To achieve the region’s economic sustainability and make local development plans more objective, it is necessary to evaluate the basin’s ecological environment quality over a period of time. First, in the Landsat historical images, we selected 5 years of data to investigate the changes in this time-period (2000–2020). Second, based on the opened remote sensing database on Google Earth Engine, we calculated the remote-sensing ecological index (RSEI) distribution map. RSEI includes greenness, temperature, humidity, and dryness. Thirdly, we assessed the ecological-environmental distribution and change characteristics in the Ulan Mulun River Basin. Finally, we analyzed the RSEI spatial auto-correlation distribution characteristics in the study area. The mean values of RSEI in 2000, 2005, 2010, 2015, and 2020 were 0.418, 0.421, 0.443, 0.456, and 0.507, respectively, which indicated that the ecological environment quality had gradually improved. The ecological environment quality from 2000 to 2005 had the biggest change, as the area with drastically changed water levels accounted for 78.98% of the total basin. It showed a downward trend in the central and western regions. It showed an upward trend in the eastern region. For 20 years, the area of deterioration decreased by 24.37%, and the slight change area increased by 45.84%. The Global Moran’s I value ranged from 0.324 to 0.568. The results demonstrated that the Ulan Mulun River Basin ecological environment quality spatial distribution was positively correlated, and the clustering degree decreased gradually. Local spatial auto-correlation of RSEI showed that high-high(H-H) was mainly distributed in the basin’s eastern and southern regions, where the population density was low and the vegetation was in good condition. Low-low(L-L) was mainly distributed in the basin’s central regions and western regions, where the population density was high, and the industrial and mining enterprises were concentrated. This study provided a theoretical basis for the sustainable development of the Ulan Mulun River Basin, which is crucial for the local ecological environment and economic development.

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The C–S–Fe system evolution reveals organic matter preservation in lacustrine shales of Yanchang Formation, Ordos Basin, China

Cited by 7 publications

References 51 publications

The depositional settings of organic-rich shale in the faulted lacustrine basin: A case study of the Y1 Member of the Yingcheng Formation in the Songliao Basin

The depositional settings of organic-rich shale in the faulted lacustrine basin: A case study of the Y1 Member of the Yingcheng Formation in the Songliao Basin

Efforts to untie the multicollinearity knot and identify factors controlling macropore structures in shale oil reservoirs

Temporal and Spatial Changes of Ecological Environment Quality Based on RSEI: A Case Study in Ulan Mulun River Basin, China

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