ALGAL FOSSILS OF SIMIAN PHOSPHORITE IN HUBEI

Cao Renguan

Phosphorite with abundant stromatolite in the Doushantuo Formation of Sinian System is well-developed and widespread in the Jingmen-Xiangyang region of Hubei. There are four phosphorite-beds, the first one consists of stromatolite, Baicalia minuta Komar, B. ampla Semikhatov, Conophyton yichengensis Cao (f. nov.), C. miloradovici Raaben, C. f., Paraconophyton hubeiensis Cao (f. nov.), Compactocol-lenia tuvensis Kor.; the second oncolite Osagia jianshanensis Cao (f.nov); the third oncolite Osagia minuta Z. Zhur. and the fourth oncolite, Osagia nersinica Yakschin and O. f.. P2O5 in the stromatolitic phosphorite accounts for 37.5% while the P2O5 in the oncolitic phosphorite 16-19% or less. Usually phosphorite appears in the offshore near platform, and is a kind of biochemigenic deposits.

Yunnan Institute of Geology

Received Date: 1986-01-16

Publish Date: 1988-03-10

Abstract: Phosphorite with abundant stromatolite in the Doushantuo Formation of Sinian System is well-developed and widespread in the Jingmen-Xiangyang region of Hubei. There are four phosphorite-beds, the first one consists of stromatolite, Baicalia minuta Komar, B. ampla Semikhatov, Conophyton yichengensis Cao (f. nov.), C. miloradovici Raaben, C. f., Paraconophyton hubeiensis Cao (f. nov.), Compactocol-lenia tuvensis Kor.; the second oncolite Osagia jianshanensis Cao (f.nov); the third oncolite Osagia minuta Z. Zhur. and the fourth oncolite, Osagia nersinica Yakschin and O. f.. P2O5 in the stromatolitic phosphorite accounts for 37.5% while the P2O5 in the oncolitic phosphorite 16-19% or less. Usually phosphorite appears in the offshore near platform, and is a kind of biochemigenic deposits.

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Reference (13)

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ALGAL FOSSILS OF SIMIAN PHOSPHORITE IN HUBEI

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