柴达木盆地北缘东段托莫尔日特似蛇绿岩岩石组合特征

详细信息

Characteristics of the Tomorit ophiolite-like assemblage in the eastern sector of the northern margin of the Qaidam basin

摘要: 出露于柴达木盆地北缘加里东裂谷带东段托莫尔日特地区的一套酷似蛇绿岩的岩石组合 ,其地质、地球化学特征显示它们并不具备洋壳性质 ,而应为形成于陆壳内的 ,即没有洋壳出现的陆缘裂谷环境下的一种似蛇绿岩组合。提出了与蛇绿岩不同的动力学形成模式 ,所讨论的似蛇绿岩可能是并无洋壳出现的陆缘裂谷的较典型代表。
- 托莫尔日特 /
- 蛇绿岩 /
- 似蛇绿岩组合 /
- 动力学 /
- 裂谷
Abstract: A rock assemblage resembling closely ophiolite is exposed in the Tomorit area in the eastern sector of the Caledonian rift zone on the northern margin of the Qaidam basin. Its geological and geochemical characteristics show that it does not have the nature of oceanic crust but should be an ophiolite like assemblage formed within continental crust, i.e. occurring in a continental margin rift environment without oceanic crust. This paper proposes a dynamic model different from that for the formation of ophiolite and points out that the ophiolite like rock in question is possibly a typical representative of the continental margin rift with oceanic crust.
- Tomorit /
- ophiolite /
- ophiolite like assemblage /
- dynamics /
- rift