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一、引言康马地区在大地构造上,位于北喜马拉雅构造带的南缘东段。本文所涉及范围:北起朱嘎乡,南至不优乡,西到满在,东抵白定浦,面积约200多平方公里。区内大面积出露的是石炭系少岗群、下二叠统康马群,其次是康马片麻状花岗岩体。少岗群由一套浅变质的斑点状板岩、云母石英片岩、石英片岩及含砂大理岩等组成,康马群由砂岩、杂砾岩、板岩及生物灰岩或大理岩组成,两群间呈整合接触关系。康马群之上, 为中、上三叠统黑色板岩角度不整合所覆。康马岩体侵入于少岗群中,使少岗群遭受了较强的接触变质作用,形成了中度变质的十字石蓝晶石石榴石云母片岩。
I. Introduction The Kangma region is located in the eastern part of the southern margin of the Northern Himalayan tectonic belt on the earth structure. This article covers the scope of: North Juga Township, South to not excellent Township, west to Manchuria, arrived in White Dingpu, an area of about 200 square kilometers. Large areas exposed in the area are the Carboniferous Shao Gang Group, Lower Permian Kangma Group, followed by the Kangma gneissic granite body. The Shaogang Formation consists of a series of metamorphic speckled slate, mica-quartz schist, quartz schist and sandy sandstone. The Kangma group consists of sandstone, conglomerate, slate and biogenic limestone or marble, and two Groups were integrated contact relationship. On top of the Colts, it is covered by the unconformity of the Middle and Upper Triassic black slate. Kangma rock intrusions in the Shaogang group, so that the Shao Gang group suffered a strong contact metamorphism, the formation of a moderate metamorphism of kyanite garnet mica schist.