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CHEN Xian-liang, JI You-liang, YANG Ke-ming, LIU Jun-long, HUANG Fu-xiang, ZHAO Chun-ni, YANG Yong, LI Long-di. Flood-overlake Sedimentary Characteristics of the Suining Formation (Lower Jurassic) in Western Sichuan Depression[J]. Acta Sedimentologica Sinica, 2014, 32(5): 912-920.
Citation: CHEN Xian-liang, JI You-liang, YANG Ke-ming, LIU Jun-long, HUANG Fu-xiang, ZHAO Chun-ni, YANG Yong, LI Long-di. Flood-overlake Sedimentary Characteristics of the Suining Formation (Lower Jurassic) in Western Sichuan Depression[J]. Acta Sedimentologica Sinica, 2014, 32(5): 912-920.

Flood-overlake Sedimentary Characteristics of the Suining Formation (Lower Jurassic) in Western Sichuan Depression

  • Received Date: 2013-06-13
  • Rev Recd Date: 2013-08-27
  • Publish Date: 2014-10-10
  • The sedimentary characteristics of the Suining Formation in Western Sichuan Depression have been studied based on core observation, electron microscope observation, grain size analysis and logging data. It is obvious that the lake was in a stable depression stage, the weather was dry-half dry and the sedimentation was significantly controlled by inflow of periodic flood; a flooded lacustrine sedimentary system formed in the Western Sichuan Depression. Alluvial fan, meandering river, meandering river delta and lacustrine facies formed flood-overlake sediments which have the following features:①lake level changed frequently and sand and mud interbed stratigraphic stacking patterns was formed; ② lacking of widely distributed semi-deep lake to deep lake sediment; ③ fluvial facies is the dominant type of the basin filling; ④the lacustrine basin beared multiple provinces and overlakes, and sandstone was deposited everywhere in the basin. As a new type of depositional model of the Suining Formation in Western Sichuan Depression, flood-overlake has important theoretical and practical significance.
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  • Received:  2013-06-13
  • Revised:  2013-08-27
  • Published:  2014-10-10

Flood-overlake Sedimentary Characteristics of the Suining Formation (Lower Jurassic) in Western Sichuan Depression

Abstract: The sedimentary characteristics of the Suining Formation in Western Sichuan Depression have been studied based on core observation, electron microscope observation, grain size analysis and logging data. It is obvious that the lake was in a stable depression stage, the weather was dry-half dry and the sedimentation was significantly controlled by inflow of periodic flood; a flooded lacustrine sedimentary system formed in the Western Sichuan Depression. Alluvial fan, meandering river, meandering river delta and lacustrine facies formed flood-overlake sediments which have the following features:①lake level changed frequently and sand and mud interbed stratigraphic stacking patterns was formed; ② lacking of widely distributed semi-deep lake to deep lake sediment; ③ fluvial facies is the dominant type of the basin filling; ④the lacustrine basin beared multiple provinces and overlakes, and sandstone was deposited everywhere in the basin. As a new type of depositional model of the Suining Formation in Western Sichuan Depression, flood-overlake has important theoretical and practical significance.

CHEN Xian-liang, JI You-liang, YANG Ke-ming, LIU Jun-long, HUANG Fu-xiang, ZHAO Chun-ni, YANG Yong, LI Long-di. Flood-overlake Sedimentary Characteristics of the Suining Formation (Lower Jurassic) in Western Sichuan Depression[J]. Acta Sedimentologica Sinica, 2014, 32(5): 912-920.
Citation: CHEN Xian-liang, JI You-liang, YANG Ke-ming, LIU Jun-long, HUANG Fu-xiang, ZHAO Chun-ni, YANG Yong, LI Long-di. Flood-overlake Sedimentary Characteristics of the Suining Formation (Lower Jurassic) in Western Sichuan Depression[J]. Acta Sedimentologica Sinica, 2014, 32(5): 912-920.
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