摘要
作者对华北地台24个煤田及煤矿区进行了详细的研究,在本溪组及太原组中共发现6期12次火山事件层。这些火山事件沉积遍及全区,主要为凝灰岩、沉凝灰岩及凝灰质沉积岩,它们在时空分布上有一定规律。火山碎屑可能来自华北地台以北及以南若干不同的火山源,而岩浆可能来自下地壳。
From a study of a good number of coal fields and coal mines of the North China Platform,12 volcanic event layers which can be grouped into 6 stages have been discovered by the authors in Benxi and Taiyuan Formations.These volcanic event deposits are wide spread in the region and consist mainly of turfs,tuffites and tuffaceous sedimentary rocks. There is some regularity in their temporal-spatial distribution.The volcanic fragments were probably from different volcanic sources to the north and south of North China Platform and the magma of volcanic matter was,maybe,from the lower crust.
出处
《地质力学学报》
CSCD
1996年第1期83-91,共9页
Journal of Geomechanics
基金
国家自然科学基金项目(4880102)部分成果。
关键词
华北地强
本溪组
火山事件
沉积
火山源
North China Platform
Benxi Formation
Taiyuan Formation
Volcanic event deposit
Volcanic source
