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Volume 20 Issue 6
Dec 2009
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Article Contents
Zaixing Jiang, Yue Wang, Chuigao Wei. Hemipelagic deposition of the Silurian Kepingtage formation in Tarim basin and its sedimentologic significance. Journal of Earth Science, 2009, 20(6): 921-931. doi: 10.1007/s12583-009-0079-z
Citation: Zaixing Jiang, Yue Wang, Chuigao Wei. Hemipelagic deposition of the Silurian Kepingtage formation in Tarim basin and its sedimentologic significance. Journal of Earth Science, 2009, 20(6): 921-931. doi: 10.1007/s12583-009-0079-z

Hemipelagic deposition of the Silurian Kepingtage formation in Tarim basin and its sedimentologic significance

doi: 10.1007/s12583-009-0079-z
Funds:

the National Natural Science Foundation of China 40672078

the Innovative Team Programme of Ministry of Education IRT0864

More Information
  • Corresponding author: Jiang Zaixing, Jiangzx@cugb.edu.cn
  • Received Date: 18 Jan 2009
  • Accepted Date: 25 Jun 2009
  • Hemipelagic contourites were interpreted in the Silurian Kepingtage (柯坪塔格) Formation in the Tarim basin, Northwest China, through studies of outcrop, core, well-log, and seismic data. They are characterized by thin to thick bedded mudstone, with contour current irregularly thin bedded-lentiform siltstone and sandstone. Chitin stone, graptolite, thin-shelled bivalve, dissoconch, and acritatch fossils are present in dark-colored mudstones. A Helminthopsis-Scolicia trace fossil assemblage was observed in the outcrop and drilling core. Sandstones are mainly well-sorted and subangular-subrounded sublitharenite. Sedimentary structures include oriented current structure, erosional surface, and small-scale cross stratifications. The potential of contourites as hydrocarbon source and reservoir rocks was evaluated on the basis of previous interpretations of paleoclimate and paleosalinity.

     

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