Primary dolostone related to the Cretaceous lacustrine hydrothermal sedimentation in Qingxi sag, Jiuquan Basin on the northern Tibetan Plateau

Wen, Hao; Zheng, Rong; Qing, Hairuo; Fan, Mingtao; Li, Yanan; Gong, BoShi

doi:10.1007/s11430-013-4654-x

Cited by 50 publications

(59 citation statements)

References 44 publications

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confidence: 98%

“…However, Sr isotope and REE, as two powerful source tracers, show the least imprint of mantlederived sources. Wen et al (2013) referred low 87 Sr/ 86 Sr relative to mantle (basalt: 0.706780-0.706960, 0.706870 on average). In addition, they provided 87 Sr/ 86 Sr ratios of the algal limestone (0.71319-0.71321, 0.71320 on average) and pointed out that it stands for isotopic composition of strontium in local lake (Wen et al, 2009).…”

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confidence: 99%

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confidence: 99%

“…With detailed analysis of the data and relevant explanations, however, we found that their data are not sufficient to support the mantle-derived hydrothermal genetic theory because the formation of extensive laminated micritic ferruginous dolostone is not yet fully understood. We will review the model proposed by Wen et al (2013) focusing on the following issues. Wen et al (2013) proposed that "this rare type of ferruginous primary dolostone is formed when hot brine erupts and then rapidly crystallizes and precipitates…the ore-forming thermal fluid is alkaline hot brine formed by the combination of the infiltration lake water and mantle-derived magmatic water."…”

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confidence: 99%

“…We will review the model proposed by Wen et al (2013) focusing on the following issues. Wen et al (2013) proposed that "this rare type of ferruginous primary dolostone is formed when hot brine erupts and then rapidly crystallizes and precipitates…the ore-forming thermal fluid is alkaline hot brine formed by the combination of the infiltration lake water and mantle-derived magmatic water." From this conclusion, we learn that the magmatic water, which not only provides abundant ions like Ca 2+ , Mg 2+ and Fe 2+ but also heats up the exotic lake water, should play a key role in the formation of dolostone.…”

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confidence: 99%

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Primary dolostone related to the Cretaceous lacustrine hydrothermal sedimentation in Qingxi sag, Jiuquan Basin on the northern Tibetan Plateau: Discussion

Yao

2016

Sci. China Earth Sci.

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Recently, a mechanism of hydrothermal sedimentation about a mantel-derived source was proposed to interpret the formation of lacustrine dolostone in the Cretaceous Xiagou Formation based on systematic petrological, mineralogical, and geochemical analyses (Wen et al., 2013). Similar to the texture found in classic hydrothermal sediments (Zhang, 1988), the breccia texture is characterized by certain hydrothermal sedimentation features. With detailed analysis of the data and relevant explanations, however, we found that their data are not sufficient to support the mantle-derived hydrothermal genetic theory because the formation of extensive laminated micritic ferruginous dolostone is not yet fully understood. We will review the model proposed by Wen et al. (2013) focusing on the following issues.

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confidence: 98%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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Primary dolostone related to the Cretaceous lacustrine hydrothermal sedimentation in Qingxi sag, Jiuquan Basin on the northern Tibetan Plateau: Discussion

Yao

2016

Sci. China Earth Sci.

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Advantageous source–reservoir combination in siliciclastic–carbonate sedimentary systems in a saline lacustrine basin (Jiuquan Basin, NW China): Implications for prediction of tight oil enrichment

2017

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Unconventional tight oil reservoirs have recently emerged as a significant source of oil worldwide, and juxtaposed to organic‐rich source rocks, tight mixed siliciclastic–carbonate sedimentary reservoirs are widely found. In China, such reservoirs are mainly found in saline lacustrine basins. In this paper, we conduct a systematic study on advantageous source–reservoir combinations (SRCs) in the Cretaceous Xiagou Formation in the Qingxi Sag of the Jiuquan Basin, a tight saline lacustrine and mixed siliciclastic–carbonate sedimentary oil reservoir. Mixed sediments result in multiple SRCs as follows: self‐contained SRC, thick interbedded‐type SRC, thin interbedded‐type SRC, and down generated‐up stored SRC. Geochemical characteristics of organic matter in the Cretaceous Xiagou Formation are established on the basis of Rock‐Eval pyrolysis and total organic carbon (TOC) and vitrinite reflectance analyses. TOC (0.5–4.12%, av. 1.62%) and S2 (0.36–26.63 mg/g, av. 5.62 mg/g) indicate a good hydrocarbon generative potential. The organic matters contain predominantly Type II kerogen with minor contributions from Type I kerogen. The samples analysed have vitrinite reflectance in the range of 0.65–1.0%Ro, and pyrolysis Tmax in the range of 430–450 °C indicate that the source rocks are early mature to mature and within the main stage of oil generation. The tight oil resources are divided into 4 classifications according to TOC versus S1 diagram, and dolomitic mudstone in lower K1g3 and K1g1 is primarily considered to be potentially generative and productive. Reservoir characterization such as porosity, permeability, and pore‐size distribution derived from nuclear magnetic resonance indicates that nano‐meter‐sized pores dominate pore size distribution, regardless of the lithology. Fractures contribute to the creation of relatively higher productivity reservoirs. The statistics of oil testing results shows that the daily oil productions increased basically from the down generated‐up stored SRCs to thin interbedded‐type SRCs to thick interbedded‐type SRCs to self‐contained SRCs. The movable oil saturations derived from nuclear magnetic resonance have the same changes as daily oil production. The self‐contained SRCs and the thick interbedded‐type SRCs are identified as advantageous SRCs that are important for tight oil prediction.

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Tribological Systems

Straffelini¹

2015

Springer Tracts in Mechanical Engineering

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Primary dolostone related to the Cretaceous lacustrine hydrothermal sedimentation in Qingxi sag, Jiuquan Basin on the northern Tibetan Plateau

Cited by 50 publications

References 44 publications

Primary dolostone related to the Cretaceous lacustrine hydrothermal sedimentation in Qingxi sag, Jiuquan Basin on the northern Tibetan Plateau: Discussion

Primary dolostone related to the Cretaceous lacustrine hydrothermal sedimentation in Qingxi sag, Jiuquan Basin on the northern Tibetan Plateau: Discussion

Advantageous source–reservoir combination in siliciclastic–carbonate sedimentary systems in a saline lacustrine basin (Jiuquan Basin, NW China): Implications for prediction of tight oil enrichment

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