Characteristics and genesis of the oncolites from the Jurassic strata in the Qiangtang Basin

PENG Zhi-min; LIAO Zhong-li; ZHANG Yu-jie; CHEN Wen-bin

Sedimentary Geology and Tethyan Geology > 2010 > 30(3): 109-112.

PENG Zhi-min, LIAO Zhong-li, ZHANG Yu-jie, CHEN Wen-bin. Characteristics and genesis of the oncolites from the Jurassic strata in the Qiangtang Basin[J]. Sedimentary Geology and Tethyan Geology, 2010, 30(3): 109-112.

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Characteristics and genesis of the oncolites from the Jurassic strata in the Qiangtang Basin

Chengdu Institute of Geology and Mineral Resources, Chengdu 610081, Sichuan, China

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Published Date: September 29, 2010

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Abstract

Unlike common oncolites,no laminated structures and no algal organisms are observed in the coatings of the oncolites from the Jurassic strata in the Qiangtang Basin.The cores generally contain bioclastics of varying sizes.Both the oncolites and their interstitial materials consist of micritic calcite.The oncolites occur mainly in the lower-energy lagoon and restricted shelf environments.
- oncolite,
- laminated structure,
- Jurassic,
- Qiangtang Basin

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Characteristics and genesis of the oncolites from the Jurassic strata in the Qiangtang Basin

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