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Article Navigation >  Acta Sedimentologica Sinica  > 2019  >  37(4): 834-846

GU ZhiXiang, HE YouBin, PENG YongMin, LUO JinXiong, LIU XiaoFan, ZHANG Jin, NIE HongYu. “Multiple-lagoon” Sedimentary Model of the Lower Cambrian Gypsum-salt Rocks in the Sichuan Basin[J]. Acta Sedimentologica Sinica, 2019, 37(4): 834-846. doi: 10.14027/j.issn.1000-0550.2018.188
Citation: GU ZhiXiang, HE YouBin, PENG YongMin, LUO JinXiong, LIU XiaoFan, ZHANG Jin, NIE HongYu. “Multiple-lagoon” Sedimentary Model of the Lower Cambrian Gypsum-salt Rocks in the Sichuan Basin[J]. Acta Sedimentologica Sinica, 2019, 37(4): 834-846. doi: 10.14027/j.issn.1000-0550.2018.188
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“Multiple-lagoon” Sedimentary Model of the Lower Cambrian Gypsum-salt Rocks in the Sichuan Basin

doi: 10.14027/j.issn.1000-0550.2018.188
  • 1.

    School of Geosciences, Yangtze University, Wuhan 430100, China;

  • 2.

    Key Laboratory of Exploration Technologies for Oil and Gas Resources, Ministry of Education, Yangtze University, Wuhan 430100, China;

  • 3.

    Petroleum Exploration and Development Research Institute, SINOPEC, Beijing 100083, China

Funds:  National Science and Technology Major Project, No. 2011ZX05004-001-004
  • Received Date: 2018-10-15
  • Rev Recd Date: 2018-12-11
  • Publish Date: 2019-08-10
  • The structural setting of the Sichuan Basin in the latter part of the Early Cambrian epoch appears as a sin-gle depression between two uplifts. The climate was hot and dry,favoring the development of gypsum-salt rocks, which characteristics were analyzed in a combination of field profile,drilling section,thin section and regional geo-logical survey. The present study of lithofacies paleogeography of gypsum-salt rocks compares the diverse hydrody-namic characteristics,sedimentary structure,single-layer thickness,development of areal scale and location,and fi-nally establishes a sedimentary model of Early Cambrian gypsum-salt rocks in the Sichuan Basin,with the following results. (1) The gypsum-salt rocks mainly comprise gypsum-bearing dolomite and gypsum rocks from 0.74 m to 419.9 m thick. The sedimentary centers are located in the Chongqing-Hejiang and Lichuan-Pengshui areas. The overall dis-tribution characteristics are "mountain type". (2) The lithological association of gypsum-salt rocks falls into three cat-egories:association of dolomite or mudstone (sand) rocks with gypsum-salt rocks,developed in the upper tidal zone;rhythmically interbedded associations of gypsum-salt rocks and dolomite in relatively shallow,low-lying areas in the upper tidal zone;and the association of gypsum-salt rocks with dolomite or shale in deeper depressions with re-stricted circulation in the upper-to inter-tidal zone. (3) In multiple-lagoons (one main lagoon and two subsidiary la-goons),the gypsum-salt rocks were formed mainly in static lagoons in southeastern Sichuan,with two subsidiary la-goons in disturbed lagoons in eastern Sichuan and in mixed tidal depressions in southwestern Sichuan.
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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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  • Received:  2018-10-15
  • Revised:  2018-12-11
  • Published:  2019-08-10

“Multiple-lagoon” Sedimentary Model of the Lower Cambrian Gypsum-salt Rocks in the Sichuan Basin

doi: 10.14027/j.issn.1000-0550.2018.188
  • 1. School of Geosciences, Yangtze University, Wuhan 430100, China;
  • 2. Key Laboratory of Exploration Technologies for Oil and Gas Resources, Ministry of Education, Yangtze University, Wuhan 430100, China;
  • 3. Petroleum Exploration and Development Research Institute, SINOPEC, Beijing 100083, China
Funds:  National Science and Technology Major Project, No. 2011ZX05004-001-004
  • Received Date: 2018-10-15
  • Rev Recd Date: 2018-12-11
  • Publish Date: 2019-08-10

Abstract: The structural setting of the Sichuan Basin in the latter part of the Early Cambrian epoch appears as a sin-gle depression between two uplifts. The climate was hot and dry,favoring the development of gypsum-salt rocks, which characteristics were analyzed in a combination of field profile,drilling section,thin section and regional geo-logical survey. The present study of lithofacies paleogeography of gypsum-salt rocks compares the diverse hydrody-namic characteristics,sedimentary structure,single-layer thickness,development of areal scale and location,and fi-nally establishes a sedimentary model of Early Cambrian gypsum-salt rocks in the Sichuan Basin,with the following results. (1) The gypsum-salt rocks mainly comprise gypsum-bearing dolomite and gypsum rocks from 0.74 m to 419.9 m thick. The sedimentary centers are located in the Chongqing-Hejiang and Lichuan-Pengshui areas. The overall dis-tribution characteristics are "mountain type". (2) The lithological association of gypsum-salt rocks falls into three cat-egories:association of dolomite or mudstone (sand) rocks with gypsum-salt rocks,developed in the upper tidal zone;rhythmically interbedded associations of gypsum-salt rocks and dolomite in relatively shallow,low-lying areas in the upper tidal zone;and the association of gypsum-salt rocks with dolomite or shale in deeper depressions with re-stricted circulation in the upper-to inter-tidal zone. (3) In multiple-lagoons (one main lagoon and two subsidiary la-goons),the gypsum-salt rocks were formed mainly in static lagoons in southeastern Sichuan,with two subsidiary la-goons in disturbed lagoons in eastern Sichuan and in mixed tidal depressions in southwestern Sichuan.

GU ZhiXiang, HE YouBin, PENG YongMin, LUO JinXiong, LIU XiaoFan, ZHANG Jin, NIE HongYu. “Multiple-lagoon” Sedimentary Model of the Lower Cambrian Gypsum-salt Rocks in the Sichuan Basin[J]. Acta Sedimentologica Sinica, 2019, 37(4): 834-846. doi: 10.14027/j.issn.1000-0550.2018.188
Citation: GU ZhiXiang, HE YouBin, PENG YongMin, LUO JinXiong, LIU XiaoFan, ZHANG Jin, NIE HongYu. “Multiple-lagoon” Sedimentary Model of the Lower Cambrian Gypsum-salt Rocks in the Sichuan Basin[J]. Acta Sedimentologica Sinica, 2019, 37(4): 834-846. doi: 10.14027/j.issn.1000-0550.2018.188
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