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Article Navigation >  Acta Sedimentologica Sinica  > 2019  >  37(6): 1117-1128

SONG ShiJun, LIU YiQun, ZHENG QingHua, ZHOU DingWu, FU Yu. Genesis Analysis of Black Rock Series: A case study of Chang 73 member in Tongchuan area[J]. Acta Sedimentologica Sinica, 2019, 37(6): 1117-1128. doi: 10.14027/j.issn.1000-0550.2019.053
Citation: SONG ShiJun, LIU YiQun, ZHENG QingHua, ZHOU DingWu, FU Yu. Genesis Analysis of Black Rock Series: A case study of Chang 73 member in Tongchuan area[J]. Acta Sedimentologica Sinica, 2019, 37(6): 1117-1128. doi: 10.14027/j.issn.1000-0550.2019.053
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Genesis Analysis of Black Rock Series: A case study of Chang 73 member in Tongchuan area

doi: 10.14027/j.issn.1000-0550.2019.053
  • 1.

    State Key Laboratory of Continental Dynamics, Northwest University, Xi'an 710069, China;

  • 2.

    Department of Geology, Northwest University, Xi'an 710069, China;

  • 3.

    College of Energy Engineering, Yulin University, Yulin, Shaanxi 719000, China;

  • 4.

    College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266510, China

Funds:  National Natural Science Foundation of China, No. BJ08133-3
  • Received Date: 2019-01-25
  • Rev Recd Date: 2019-03-16
  • Publish Date: 2019-12-10
  • The genesis of the black rock series of the Triassic Chang 73 member has been controversial. It is gradually gaining acceptance that pyroclastic deposition and hydrothermal deposition are the genesis,along with normal terrigenous sedimentation. In this study,of the Chang 73 member was sampled from top to bottom,and the samples were analyzed by SEM, XRD and optical microscopy to determine the sedimentary properties of the Yaoqu-Yishi village section in Tongchuan. It was found that(1) so-called "black mudstone" is dust tuff and "silt-fine sandstone" is silt to fine-sand tuff,and(2) hydrothermal deposition is abundant in the section,with typical hydrothermal mineral assemblages such as buddingtonite + jarosite + pyrite,amorphous SiO2 + barite,and albitized plagioclase. Pyroclastic deposits and hydrothermal deposits are interbedded with normal terrigenous sediments from deposited semi-deep and shallow lake facies,gravity flow deposits,and massive pyroclastic deposits far from the eruption source,with modified hydrothermal fluid. This particular genesis and sedimentary setting makes the black rock series a potentially highquality hydrocarbon source rock and reservoir favoring significant hydrocarbon accumulation.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Publishing history
  • Received:  2019-01-25
  • Revised:  2019-03-16
  • Published:  2019-12-10

Genesis Analysis of Black Rock Series: A case study of Chang 73 member in Tongchuan area

doi: 10.14027/j.issn.1000-0550.2019.053
  • 1. State Key Laboratory of Continental Dynamics, Northwest University, Xi'an 710069, China;
  • 2. Department of Geology, Northwest University, Xi'an 710069, China;
  • 3. College of Energy Engineering, Yulin University, Yulin, Shaanxi 719000, China;
  • 4. College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266510, China
Funds:  National Natural Science Foundation of China, No. BJ08133-3
  • Received Date: 2019-01-25
  • Rev Recd Date: 2019-03-16
  • Publish Date: 2019-12-10

Abstract: The genesis of the black rock series of the Triassic Chang 73 member has been controversial. It is gradually gaining acceptance that pyroclastic deposition and hydrothermal deposition are the genesis,along with normal terrigenous sedimentation. In this study,of the Chang 73 member was sampled from top to bottom,and the samples were analyzed by SEM, XRD and optical microscopy to determine the sedimentary properties of the Yaoqu-Yishi village section in Tongchuan. It was found that(1) so-called "black mudstone" is dust tuff and "silt-fine sandstone" is silt to fine-sand tuff,and(2) hydrothermal deposition is abundant in the section,with typical hydrothermal mineral assemblages such as buddingtonite + jarosite + pyrite,amorphous SiO2 + barite,and albitized plagioclase. Pyroclastic deposits and hydrothermal deposits are interbedded with normal terrigenous sediments from deposited semi-deep and shallow lake facies,gravity flow deposits,and massive pyroclastic deposits far from the eruption source,with modified hydrothermal fluid. This particular genesis and sedimentary setting makes the black rock series a potentially highquality hydrocarbon source rock and reservoir favoring significant hydrocarbon accumulation.

SONG ShiJun, LIU YiQun, ZHENG QingHua, ZHOU DingWu, FU Yu. Genesis Analysis of Black Rock Series: A case study of Chang 73 member in Tongchuan area[J]. Acta Sedimentologica Sinica, 2019, 37(6): 1117-1128. doi: 10.14027/j.issn.1000-0550.2019.053
Citation: SONG ShiJun, LIU YiQun, ZHENG QingHua, ZHOU DingWu, FU Yu. Genesis Analysis of Black Rock Series: A case study of Chang 73 member in Tongchuan area[J]. Acta Sedimentologica Sinica, 2019, 37(6): 1117-1128. doi: 10.14027/j.issn.1000-0550.2019.053
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