摘要
介绍了特提斯喜马拉雅带中—基性火山岩的研究进展,报道了新近在该带中部地区二叠系到白垩系地层中发现的11个层位的中—基性火山岩,讨论了在特提斯喜马拉雅火山岩研究中存在的一些问题及其在反演印度大陆北缘大地构造属性方面的意义。据目前已有的研究成果,认为特提斯喜马拉雅带的二叠纪火山活动可能与新特提斯洋的开启有成生联系,中生代火山事件则主要与印度大陆北缘不同时期的伸展活动有关。新近发现的中—基性火山岩的科学意义体现在3个方面:查明印度大陆北缘二叠纪—白垩纪长达225Ma时间跨度范围内的大地构造属性;了解印度大陆北缘构造活动的时空演化规律,重建特提斯的构造演化格架,为全球对比提供依据。
Based on the introduction of the advances of study for the intermediatebasic volcanic rocks in the Tethyan Himalaya, this paper firstly reports the newly discovered 11 horizons of intermediatebasic volcanic rocks from Permian to Cretaceous in the center of Tethyan Himalaya, and then discusses the problems of studying these volcanic rocks and their tectonic significance in revealing the tectonic property of north margin of Indian continent. So far as present advances are concerned, the Permian volcanic activities in Tethyan Himalaya are associated with the opening of Neotethys, whereas the Mesozoic volcanic activities mainly contribute to the extensional events of north margin of India continent in different periods. The tectonic settings, spatial-temporal evolution patterns for the north margin of India continent from Permian to Cretaceous and the tectonic evolution information of Tethyan margin could be revealed by studying the 11 new horizons of intermediate-basic volcanic rocks in the center of Tethyan Himalaya.
出处
《地质科技情报》
CAS
CSCD
北大核心
2003年第2期6-12,共7页
Geological Science and Technology Information
基金
中国地质调查局青藏高原地质研究综合项目"青藏高原地质构造及资源环境效应研究"(200113900069)
及其子课题"冈底斯构造-岩浆带综合研究"(200113900069-5)
"青藏高原南部空白区基础地质调查与研究"(1212010310102)
国家"973"项目"印度与亚洲大陆主碰撞成矿带作用"(2002CB412600)
及其子课题"成矿潜力评估与战略新区预测(2002CB412609)
