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应用现代地表不同环境的碳酸盐成岩特征,分析“南永1井”井深152m的珊瑚礁岩心的成岩变化,发现这152m珊瑚礁层中有3个沉积间断面(分别位于井深17,90和142m处),分为4个沉积旋回,分属4次海平面上升期建造,3个沉积间断面是3次海平面下降期形成的。 相似文献
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南海现代生物碳酸盐沉积的垂向分带 总被引:1,自引:1,他引:1
南海的现代碳酸盐质沉积,主要是生物源。据生物组分、矿物成分和主要化学元素的垂向变化,分为三带:石质生物富积带(60m以浅);镁方解石质生物富积带(60-400m);方解石质生物富积带(400-3800m)。 相似文献
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The Xisha Islands consist of more than 30 islands. large and small, as well as bars,reefs and shoals. With the exception of Gaojianshi (the Volcanic Rock), they are allcoral reefs. However, little is known about what biotic process has been operating inthe formation of these coral reefs. Some authors suggest that it is mainly due to theprocess of reef-building corals. Others consider that coralline algae (or calcareousalgae) have been rather important in the formation of the reefs. Similarly, disagreementexists on whether there are "algal-ridges" on the windward sea side. Some are of theopinion that there are "algal-ridges" everywhere in Xisha Islands, but others assertdefinitely that there are no "algal-ridges" in Xisha Islands. 相似文献
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朱袁智 《矿物岩石地球化学通报》1987,(4)
海南岛地处南海北部海区。沿岸表层水温受季节性气候变化影响。一般认为造礁珊瑚生长的海水温度下限为20℃。Ph·H·奎年认为25—30℃是造礁珊瑚大量繁殖的温度范围。海南岛沿岸海水的月平均温度,除北部(海口)1、2月份低于20℃外,其他都高于20℃。每年4—11月的沿岸水温为25—30℃,属造礁珊瑚繁殖的最佳范围。但北岸和 相似文献