摘要:
华南板块在泥盆纪时期属东亚古特提斯泛大洋中华夏古陆群的一部分,它和冈瓦那大陆与北方大陆群(北美、东欧、西伯利亚等)处于不同的构造背景下。华南泥盆系分布广泛、发育齐全,可以作为东亚泥盆系的典型地区。本文根据华南黔桂、龙门山及南秦岭泥盆系10余条部面层序地层划分和对比,识别出21个与二级海平面变化响应的层序和T—R旋回,并与Johnson (1985,1992)和Ross (1988)以欧美大陆为代表的泥盆纪的T—R旋回进行了对比,并讨论二者之间的异同及其控制因素。
关键词:
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华南
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泥盆纪
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层序
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海平面变化
Abstract:
The South China plate,lying between Gondwana and Boreal continental group (North America,East Europe,Siberia etc.),was a part of the Cathaysian continental group in the Palaeo-Tethys of East Asia during Devonian time.The Devonian strata are widely distrubuted and well developed in South China,and may act as one of the type areas of the Devonian strata in East Asia.In the light of the division and correlation of sequence stratigraphy of more than ten Devonian sections in Guizhou,Guangxi,Longmen Mountain in Sichuan and South Qinling Mountain area,twenty-one sequences and T-R cycles in response to the second-order sea-level changes are suggested,and comparable to the Devonian T-R cycles in the Euramerican continent by Johnson (1985 and 1992)and Ross (1988). The similarities and differences between them and controlling factors are herein discussed.
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