摘要
环境因素(如海平面高度、海水清洁度和盐度等)的变化会影响生物礁的生长和演化,从而在不同地质历史时期形成不同类型的生物礁,其在形态和构造上具有高度复杂性。对中扬子地台和塔里木地台早-中奥陶世生物礁的大地构造条件、岩相古地理条件、造礁生物和附礁生物、典型生物礁特征、礁死亡原因等进行了对比分析:中扬子地台生物礁种类多,数量多,分布面积广,塔里木地台生物礁种类少,数量少,分布范围有限;中扬子地台构造活动弱,区域稳定,更适合于生物礁的生长;由于海平面上升导致台地的沉没,最终造成中扬子地台和塔里木地台的生物礁相继解体。
The changes in environment,such as the rise and fall of the sea level,the cleanliness,the size of the salinity of the sea water,would affect the growth,evolution and preservation of the reef. Organic reefs along with geological history,are diverse and complex in structure composition and form.This paper discusses the contrast of Yangtze and Tarim platforms of the Early-middle Ordovician organic reef,its tectonics,ecological conditions,paleogeography,reef-building organism,reef characteristics and evolution and demise.Studies show that the sinking of the platform is due to the relative sea level rising,it results in the disintegration of the reef.
出处
《长江大学学报（自科版）（中旬）》
CAS
2014年第1期84-86,8,共3页
Journal of Yangtze University(Nature Science Edition)
关键词
生物礁
中扬子地台
塔里木地台
早-中奥陶世
reef
middle Yangtze Platform
Tarim Platform
early-middle Ordovician organic reef
