Structure Classification and Distribution of Reef of Changxing Group in Northeast Sichuan
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摘要: 长兴期生物礁按结构分为成熟生物礁、半成熟生物礁和未成熟生物礁三种类型。成熟生物礁具有规模大、形态复杂、结构完整、造礁生物多、变浅相序等特点,未成熟生物礁具有规模小、形态简单、结构不完整、造礁生物少、变浅再变深相序等特点,半成熟生物礁的特点介于两者之间。成熟生物礁分布于台坪与台凹深水的过渡地带和台地边缘,半成熟生物礁分布于台坪与台凹次深水过渡地带,未成熟生物礁分布于台坪和台凹中。Abstract: According to structure features, the Changxing reefs are classified as mature, semimature and imma-ture reefs. The mature reefs have the characteristics of large scale, complex shape, complete structure, lots of hermatrypic organisms and shallowing sedimentary sequence. The immature reefs have the char-acteristics of small scale, simple shape, incomplete structure, a few hermatrypic organisms and deepening sedimentary sequence. The semimature reefs'characteristics are between the mature reefs and the imma-ture reefs. The mature reefs are distributed over platform edge and transition of platform-flat and plat-form-mulde deep water. The semimature reefs are distributed over transition of platform-flat and plat-form-mulde semideep water. The immaturereefs are distributed over platform-flat and platform-mulde.
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Key words:
- reef /
- structure /
- maturity /
- distribution
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[1] .张明书. 西沙生物礁碳酸盐岩沉积地质学研究. 北京: 科学出版社, 1989. 9~12 [2] .Read, J R. Carbonate platform facies models. AAPG Bulletin, 1985, 69(1): 1~21. -

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