Cambrian Reefs in the Western North China Platform, Wuhai, Inner Mongolia

Jeong Hyun Lee, Byeong Jun Kim, Kun Liang, Tae Yoon S Park, Suk-Joo Choh, Dong Jin Lee, Jusun Woo

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Mid to late Cambrian thrombolites and maze-like maceriate reefs from the western North China Platform, Wuhai, Inner Mongolia, northwestern China, occur in the middle of a succession dominated by thin-bedded lime mudstone-shale/marlstone alternations, and are laterally surrounded by limestone conglomerate and/or grainstone. Thrombolite, characterized by meter-scale lenticular mounds composed of millimeter- to centimeter-scale mesoclots and wackestone matrix, occurs in the lower middle part of the sequence. Thrombolite mesoclots are composed of microstromatolites with alternating dark gray and light gray micritic laminae. The maze-like maceriate reefs occur in the middle to the upper part of the sequence, commonly forming lenticular mounds up to 1 m thick. They are characterized by centimeter- to decimeter-scale branched maze-like structures, whose biogenic portions (maceria) are selectively dolomitized. The maceriae are composed of poorly preserved microstromatolites and siliceous sponges. Inter-macerial sediments consist of lime mud and scattered bioclasts. These Wuhai reefs are generally similar to but older than various other Cambrian reefs previously reported from the Shandong region, northeastern China.

Original languageEnglish
Pages (from-to)1946-1954
Number of pages9
JournalActa Geologica Sinica
Volume90
Issue number6
DOIs
Publication statusPublished - 2016 Dec 1

Keywords

  • Cambrian Series 3: Guzhangian
  • microbialite
  • North China Platform
  • organosedimentary petrology
  • reefal carbonate
  • siliceous sponge

ASJC Scopus subject areas

  • Geology

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  • Cite this

    Lee, J. H., Kim, B. J., Liang, K., Park, T. Y. S., Choh, S-J., Lee, D. J., & Woo, J. (2016). Cambrian Reefs in the Western North China Platform, Wuhai, Inner Mongolia. Acta Geologica Sinica, 90(6), 1946-1954. https://doi.org/10.1111/1755-6724.13014