Source rock deposition controlled by tectonic subsidence and climate in the western Pearl River Mouth Basin, China: Evidence from organic and inorganic geochemistry

Quan, Yongbin; Hao, Fang; Liu, Jianzhang; Zhao, Dijiang; Tian, Jinqiang; Wang, Zhenfeng

doi:10.1016/j.marpetgeo.2016.10.028

Cited by 46 publications

(19 citation statements)

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“…The C 29 regular steranes is similar to C 27 , which is higher than C 28 , displaying a “V”‐type distribution. C 30 4‐methyl sterane is relatively high, indicating that aquatic materials provide the main organic matter source for the Wenchang mudstones (Bao, Zhu, Zhu, Shi, & Zhan, ; Quan et al, ).…”

Section: Resultsmentioning

confidence: 99%

“…It is now generally recognized that three main factors control the distribution of lacustrine source rocks: (1) the factors that control lake basin sedimentary; (2) the aquatic environment and the efficiency of organic preservation; and (3) palaeoclimate and productivity of organic matter (Katz, , , ). These factors can be assessed using a wide range of proxies, such as geophysical data (Barron, ; Carcione, Helle, & Avseth, ; Huang, Tian, Wilkins, Xiao, & Li, ), variations in biota (Carroll & Bohacs, ; Demaison & Moore, ; Hao et al, ), and geochemical parameters (Carroll & Bohacs, ; Hao et al, ; Peters, Walters, & Moldowan, ; Quan et al, ). Previous researchers have attempted to interpret organic matter accumulation models for lacustrine source rocks.…”

Section: Introductionmentioning

confidence: 99%

“…Huang et al () concentrated on the palaeoenvironment of high‐quality source rocks. The combined effects of tectonics, sedimentary environments, palaeoclimate, the supply of organic matter, and preservation conditions on lacustrine source rocks deposition have been a popular topic (Barron, , ; Chen, Zha, & Jin, ; Chen et al, ; Demaison & Moore, ; Glenn & Kelts, ; Garcés et al, ; Li, Deng, & Zhang, ; Kelts, ; Olsen, ; Quan et al, ; Zhang et al, ). These factors control the depositional settings, sediment accumulation potential, and source rocks formation conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the Zhu I Depression is an ideal natural laboratory for exploring source rock deposition models controlled by multiple factors. Recently, this has received more and more attention because of its huge exploration potential (Li, Xie, Huang, Hui, & Lin, ; Jiang et al, ; Peng et al, ; Quan et al, ; Wu et al, ; Xie et al, ). Since the 1980s, a series of oil fields have been discovered with a few gas fields.…”

Section: Introductionmentioning

confidence: 99%

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Characterizations and accumulation of lacustrine source rocks in the Zhu I Depression, Pearl River Mouth Basin, China

Wang

Dong

et al. 2019

Geological Journal

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The study of source rocks is a key component in the exploration and discovery of hydrocarbon plays in the offshore petroliferous basins of China. Geochemical analyses, drilling, seismic, and microfossil data were integrated to document the formation mechanism of lacustrine source rocks contained in the Wenchang Formation in the Zhu I Depression of the Pearl River Mouth Basin, China. Several factors that control the development of lacustrine source rocks were evaluated in this study, including tectonics, sedimentary conditions, palaeoclimate, the supply of organic matter, and redox conditions. The deposition and occurrence of source rocks is a combined function of these factors. Lacustrine source rocks are characterized by high organic matter contents (average TOC value = 1.33 wt.%) and are dominated by type I and type II1–2 kerogen, which primarily originate from planktonic algae. The rifting of basement rocks, syn‐sedimentary faults, and palaeoclimate played significant roles in controlling the geochemical properties of the source rocks (e.g., controlling the abundance and types of organic matter). The Eocene lacustrine source rocks were deposited when the palaeoclimate was characterized by humid to semi‐humid, subtropical to tropical weather that did not have a stable temperature or humidity. Controlled by large‐scale faults, “Half‐graben patterns” and “Graben patterns” are the two main palaeotopographic patterns where the thermal stratification of deep lake water resulted in flourishing planktonic algae in its surface zones. Dysoxic to anoxic conditions prevailed during the deposition of the lacustrine source rocks. An underfilled basin situation caused the occurrence of abundant organic matter during the period of maximum surface flooding.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Characterizations and accumulation of lacustrine source rocks in the Zhu I Depression, Pearl River Mouth Basin, China

Wang

Dong

et al. 2019

Geological Journal

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“…Therefore, to clarify the organic matter accumulation mechanism in a lacustrine rift basin, it is important to characterize organic matter sources, depositional paleoenvironment, and water column properties. Organic geochemical parameters and elemental geochemistry are effective methods because they can provide vast information about organic matter source, climate condition, primary productivity, and redox conditions (Cao, Liu, et al, ; Ding et al, ; Fu, Wang, Zeng, Tan, & Feng, ; Hao et al, ; Harris, Freeman, Pancost, White, & Mitchell, ; Jia, Bechtel, et al, ; Ma, Wang, Lv, Li, & Yi, ; Makeen, Hakimi, & Abdullah, ; Quan et al, ; Sarki Yandoka, Abdullah, Abubakar, Hakimi, & Adegoke, ).…”

Section: Introductionmentioning

confidence: 99%

Geochemical characteristics, depositional environment, and controlling factors of Lower Cretaceous shales in Chagan Sag, Yingen‐Ejinaqi Basin

et al. 2017

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The Lower Cretaceous shales of Chagan Sag, Yingen‐Ejinaqi Basin, are considered as the source rocks of hydrocarbons discovered in the sag. Borehole shales from the Lower Cretaceous were subjected to comprehensive geochemical study to evaluate the quality of source rock, to reconstruct the paleodepositional environment and to determine the controlling factors of organic matter enrichment. Content of present‐day total organic carbon, and hydrogen index, averaging 1.4% and 259.2 mg hydrocarbon/g total organic carbon, respectively reveal poor to fair quality of organic matter. Average value of vitrinite reflectance (Ro) of 1.0% indicates mature organic matter. Maceral composition and biomarker analysis provide evidence for a mixed aquatic and terrigeous organic matter input. Based on Sr/Cu, Sr/Ba, and gammacerane index, we propose that organic matter was deposited in closed hypersaline under hot and arid climate conditions. The ratios of V/(V + Ni), and pristane/phytane (Pr/Ph), as well as the presence of β‐carotene suggest a stratified water column with anoxic bottom water condition. Low to moderate productivity as a result of deficient nutrient supply, the excellent organic matter preservation condition under stratified anoxic water column and high sedimentary rate controlled the quality of source rock. In addition, influence of factors such as content of clay minerals on organic matter enrichment cannot be ignored.

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Depositional environment and sediment provenance of the third member of the Palaeogene Shahejie Formation in the Nanpu Sag of the Bohai Bay Basin, eastern China: Evidence from trace and rare earth element geochemistry

et al. 2021

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The depositional environment and sediment provenance of the third member of Palaeogene Shahejie Formation (Es3) in the Nanpu Sag of the Bohai Bay Basin, eastern China, are reconstructed by analysing trace element and rare earth element (REE), and the formation mechanism of organic‐matter‐rich shales of the same member is also evaluated. These results show that the terrigenous detrital supply in the Nanpu Sag was relatively sufficient during the Es3 interval, and the total REE contents range from 148.23 to 319.28 ppm, close to or higher than that of the upper crust. The Sr concentrations are 214.22–525.54 ppm and the Sr/Ba ratios are 0.31–0.74, which represent the coexistence of fresh, brackish, and saline waters during the Es3 interval. The V/(V + Ni) ratios of 0.71–0.82, Th/U ratios of 0.82–4.05, and positive δCe anomaly confirm that the water column was suboxic condition, with moderate stratification during the Es3 interval. Comparison of REE behaviours suggests that the Es3 sediments were primarily derived from Yanshanian granites at the Yanshanian fold belt at the active continental margin. The development of organic‐matter‐rich shales in the Es3 member in the Nanpu Sag was closely related to major palaeoenvironmental and palaeogeographical variations in that time, which can be summarized: (a) suitable palaeosalinity as well as sufficient nutrients in water column contributed to the boom of various planktonic algae, improving the production efficiency of aquatic organic matter; (b) suboxic water column slowed down the degradation of oxygen‐sensitive materials during the burial process, enhancing the preservation efficiency of aquatic organic matter.

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Source rock deposition controlled by tectonic subsidence and climate in the western Pearl River Mouth Basin, China: Evidence from organic and inorganic geochemistry

Cited by 46 publications

References 50 publications

Characterizations and accumulation of lacustrine source rocks in the Zhu I Depression, Pearl River Mouth Basin, China

Characterizations and accumulation of lacustrine source rocks in the Zhu I Depression, Pearl River Mouth Basin, China

Geochemical characteristics, depositional environment, and controlling factors of Lower Cretaceous shales in Chagan Sag, Yingen‐Ejinaqi Basin

Depositional environment and sediment provenance of the third member of the Palaeogene Shahejie Formation in the Nanpu Sag of the Bohai Bay Basin, eastern China: Evidence from trace and rare earth element geochemistry

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