Petroleum-generation timing and source in the northern Longmen Shan thrust belt, Southwest China: Implications for multiple oil-generation episodes and sources

Gao, Xiang; Shen, Chuanbo; Selby, David; Wang, Jie; Ma, Ling; Ruan, Xinbo; Hu, Shouzhi; Mei, Lianfu

doi:10.1306/0711171623017125

Cited by 21 publications

(18 citation statements)

References 79 publications

(143 reference statements)

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“…Despite the contribution of these methods to the understanding of petroleum system evolution, they are limited by poorly constrained parameters (e.g., paleogeothermal gradient) or difficulties associated with sampling and analyzing (e.g., grain size versus purity of authigenic minerals for radiometric dating). During the past decade, the rhenium-osmium (Re-Os) chronometer has been demonstrated to be a promising radiometric tool to directly date petroleum samples and for oil-source correlation (Selby and Creaser, 2005b;Selby and Creaser, 2005a;Selby et al, 2007;Finlay et al, 2011;Finlay et al, 2012;Rooney et al, 2012;Lillis and Selby, 2013;Cumming et al, 2014;Ge et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…More recently, Re-Os bitumen data has provided insights into the temporal hydrocarbon evolution in the Longmen Shan Thrust Belt, southwest China, i.e. the multiple oil generation episodes and sources, and its relationship to tectonism, and additionally discussed implications for future exploration of the adjacent petroliferous Sichuan Basin (Ge et al, 2017). Furthermore, a study of the Green River petroleum system in the Uinta basin, USA, demonstrated the capacity of the Re-Os chronometer to yield the timing of oil generation (19 ± 14 Ma) in lacustrine petroleum systems in addition to marine petroleum systems (Cumming et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Rhenium–osmium geochronology and oil–source correlation of the Duvernay petroleum system, Western Canada sedimentary basin: Implications for the application of the rhenium–osmium geochronometer to petroleum systems

Liu¹,

Selby²,

Obermajer³

et al. 2018

Bulletin

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The rhenium-osmium (Re-Os) geochronometer has been applied to many petroleum systems worldwide. However, it is debated if the Re-Os systematics in petroleum actually records the timing of oil generation. Here, we investigate the Re-Os isotope systematics of the Duvernay petroleum system in the Western Canada sedimentary basin, which has been shown to be a relatively simple petroleum system that is associated with oil generated during the Late Cretaceous-Early Eocene Laramide orogeny from a single source. The organic geochemistry of the Duvernay oils (pristane/phytane ratios of ~1.5, smooth homohopane profile, C 29 >C 27 >C 28 regular sterane distribution, and predominance of diasteranes over regular steranes) strongly suggest the oil source to be that of Type I-II marine organic matter of the Late Devonian Duvernay Formation. The asphaltene fraction Re-Os isotope data of the Duvernay oil yield an age of 66 ± 31 Ma, which is in excellent agreement with the timing of the main-stage hydrocarbon generation of the Duvernay Formation based on basin models. Further, the similarity between the 187 Os/ 188 Os compositions of the Duvernay Formation source rock (0.46 to 1.48) and the oil (0.55 to 1.06) at the time of oil generation supports the hypothesis that the 187 Os/ 188 Os composition of an oil is inherited from the source unit at the time of oil generation, and therefore shows no, or limited influence from interaction with basin fluids. This study supports that the Re-Os isotope systematics of an oil can yield the timing of oil generation, and be used to trace its source.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Rhenium–osmium geochronology and oil–source correlation of the Duvernay petroleum system, Western Canada sedimentary basin: Implications for the application of the rhenium–osmium geochronometer to petroleum systems

Liu¹,

Selby²,

Obermajer³

et al. 2018

Bulletin

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“…Although the metallogenic age of the Mayuan Pb-Zn deposit in this metallogenic belt has been determined (486 ± 12 Ma, Li et al, 2007), this age remains controversial because it differs markedly from that of the periphery of the Sichuan Basin. Ge et al (2018a); Ge et al (2018b), and Shen et al (2019) show that there are two stages of reservoir formation for the Ediacaran and Cambrian oil and gas in the Sichuan Basin:~450 Ma and 205~162 Ma, among which the key period of gas accumulation is 205-162 Ma. The accumulation age of 450 Ma is different from the 486 ± 12 Ma metallogenic age; besides, whether there is a corresponding mineralization in another accumulation of 205-162 Ma is not known.…”

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confidence: 99%

The relationship between hydrocarbon accumulation and Mississippi Valley‐type Pb‐Zn mineralization of the Mayuan metallogenic belt, the northern Yangtze block, SW China: Evidence from ore geology and Rb‐Sr isotopic dating

et al. 2020

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The coexistence of Pb‐Zn deposits and oil/gas reservoirs demonstrates that a close genetic connection exists between them. The spatiotemporal relationship between Pb‐Zn mineralization and hydrocarbon accumulation is the key to understanding this genetic connection. The Mayuan large‐scale Pb‐Zn metallogenic belt is composed of a number of Mississippi Valley‐type (MVT) Pb‐Zn deposits that were recently discovered on the northern margin of the Yangtze Block, China. It is hosted in the dolostone of the Sinian (Ediacaran) Dengying Formation (Z2dn). In addition to the abundant bitumen in the Mayuan Pb‐Zn metallogenic belt, the paleo‐oil reservoir and the MVT Pb‐Zn deposit overlap in space. In this study, two precise ages of 468.3 ± 3.8 Ma and 206.0 ± 6.5 Ma were obtained via the Rb‐Sr isotopic dating of galena and sphalerite from the Mayuan Pb‐Zn metallogenic belt, respectively. The early metallogenic age of 468.3 ± 3.8 Ma is similar to the previously published age of 486 ± 12 Ma. The age of 206.0 ± 6.5 Ma is consistent with the age of the metallogenic event that occurred at 200 Ma in the Upper Yangtze Pb–Zn metallogenic province of the Sichuan‐Yunnan‐Guizhou polymetallic zone, which is located on the southwest margin of the Sichuan Basin, suggesting that the metallogenic effects of this period were regional in scale in the peripheral areas of the Sichuan Basin. Previous studies have shown that two periods of hydrocarbon accumulation occurred in the oil/gas reservoir that coexists with the Pb‐Zn deposits in the study area. The Pb‐Zn mineralization at 468.3 ± 3.8 Ma occurred during the first period of hydrocarbon accumulation, while the second mineralization at 206.0 ± 6.5 Ma occurred during the transformation of the paleo‐oil reservoir to a paleogas reservoir. The spatial relationship between the paleo‐oil/‐gas reservoir and the MVT Pb‐Zn deposits and the temporal relationship between mineralization and hydrocarbon accumulation show that a close genetic relationship exists between the MVT Pb‐Zn mineralization and hydrocarbon accumulation. Analysis of metals in the source rocks forming the paleo‐oil/‐gas reservoirs show that source rocks which formed paleo‐oil/‐gas reservoirs may have provided metals for Pb‐Zn mineralization. Both the paleo‐oil/‐gas reservoirs and Pb‐Zn mineralizing fluids had the same origin.

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“…Previous studies have successfully applied Re-Os geochronology to petroleum systems in marine-dominated basin environments (Ravizza and Turekian 1989;Cohen et al 1999;Selby and Creaser 2005a, b;Rooney et al 2010;Finlay et al 2011;Lillis and Selby 2013;Zhu et al 2013;Bertoni et al 2014;Ge et al 2016Ge et al , 2018Georgiev et al 2019). However, lacustrine sedimentary basins-which are important sources of hydrocarbons in China-can be more challenging (Li et al 2017) because sediments of subaerial provenance are likely to have low initial Re and Os concentrations (Creaser et al 2008;Baioumy et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Rhenium–osmium (Re–Os) geochronology of crude oil from lacustrine source rocks of the Hailar Basin, NE China

et al. 2020

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Re–Os radiometric dating of crude oil can be used to constrain the timing of hydrocarbon generation, migration or charge. This approach has been successfully applied to marine petroleum systems; however, this study reports on its application to lacustrine-sourced natural crude oils. Oil samples from multiple wells producing from the Cretaceous Nantun Formation in the Wuerxun-Beier depression of the Hailar Basin in NE China were analysed. Subsets of the Re–Os data are compatible with a Cretaceous hydrocarbon generation event (131.1 ± 8.4 Ma) occurring within 10 Myr of deposition of the Nantun Formation source rocks. In addition, two younger age trends of 54 ± 12 Ma and 1.28 ± 0.69 Ma can be regressed from the Re–Os data, which may reflect the timing of subsequent hydrocarbon generation events. The Re–Os geochronometer, when combined with complementary age dating techniques, can provide direct temporal constraints on the evolution of petroleum system in a terrestrial basin.

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Petroleum-generation timing and source in the northern Longmen Shan thrust belt, Southwest China: Implications for multiple oil-generation episodes and sources

Cited by 21 publications

References 79 publications

Rhenium–osmium geochronology and oil–source correlation of the Duvernay petroleum system, Western Canada sedimentary basin: Implications for the application of the rhenium–osmium geochronometer to petroleum systems

Rhenium–osmium geochronology and oil–source correlation of the Duvernay petroleum system, Western Canada sedimentary basin: Implications for the application of the rhenium–osmium geochronometer to petroleum systems

The relationship between hydrocarbon accumulation and Mississippi Valley‐type Pb‐Zn mineralization of the Mayuan metallogenic belt, the northern Yangtze block, SW China: Evidence from ore geology and Rb‐Sr isotopic dating

Rhenium–osmium (Re–Os) geochronology of crude oil from lacustrine source rocks of the Hailar Basin, NE China

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