Manganese Enrichment in a Triassic Aulacogen Graben in the Lijiang Basin, Yunnan Province, China

  1. John Parnell,
  2. Ye Lianjun and
  3. Chen Changming
  1. H. Liu

Published Online: 3 APR 2009

DOI: 10.1002/9781444303872.ch5

Sediment-Hosted Mineral Deposits: Proceedings of a Symposium Held in Beijing, People's Republic of China, 30 July-4 August 1988

Sediment-Hosted Mineral Deposits: Proceedings of a Symposium Held in Beijing, People's Republic of China, 30 July-4 August 1988

How to Cite

Liu, H. (1990) Manganese Enrichment in a Triassic Aulacogen Graben in the Lijiang Basin, Yunnan Province, China, in Sediment-Hosted Mineral Deposits: Proceedings of a Symposium Held in Beijing, People's Republic of China, 30 July-4 August 1988 (eds J. Parnell, Y. Lianjun and C. Changming), Blackwell Publishing Ltd., Oxford, UK. doi: 10.1002/9781444303872.ch5

Editor Information

  1. Department of Geology, The Queen's University of Belfast, Belfast BT7 INN, UK

Author Information

  1. Southwest Research Institute of Metallurgy and Geology, Erxianqiao, Chengdu, China

Publication History

  1. Published Online: 3 APR 2009
  2. Published Print: 27 SEP 1990

ISBN Information

Print ISBN: 9780632028818

Online ISBN: 9781444303872

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Keywords:

  • Lijiang Basin, developing during Norian stage;
  • Runanshao fault, forming a depression;
  • main sediments of Lijiang Basin, belonging to Songgui Formation;
  • deposition of black mudstone, extending over aulacogen basin;
  • high-grade Heqing manganese deposit, occurring in southwest part of Lower Songgui Formation

Summary

The Lijiang Basin developed during the Norian stage of the late Triassic on the western passive continental margin of the Yangtze plate adjacent to the Tethys plate. A small aulacogen striking approximately east–west developed in the southwest part of this basin east of the Jinshajiang fault and the boundary of the plate near Jianchuan. The Runanshao fault forms a depression along the centre of the aulacogen. Tholeiitic olivine basalt and volcaniclastic rock in the middle and lower part of the Songgui Formation (Norian stage) are interbedded or intercalated in olistostromes of middle Triassic limestone, which are characteristic of the early stage of development of the aulacogen. During this stage, manganese ore bodies at the base of the volcanic rocks were formed by volcanic exhalation, sedimentary and diagenetic processes.