胶东群变质岩系  

3 METAMORPHIC ROCK OF JIAO DONG GROUP

作　　者：张竹如[1] 

机构地区：[1]贵州工学院地质系

出　　处：《贵州工学院学报》1994年第3期20-32,共13页

基　　金：国家黄金局资助

摘　　要：区内变质岩主要有六类：（１）片麻岩类（２）角闪岩石类（３）变粒岩及浅粒岩类（４）片岩类（５）矽卡岩类（６）大理岩类。经原岩恢复，分布最广的片麻岩类岩石为钙碱性火山岩系基性火山岩、火山凝灰岩及部分陆源碎屑杂砂岩；角门石岩类为成因复杂的富铁铁质火山岩。其它岩类大多为海相沉积岩石央少量火山凝灰岩。并利用Ａｕ／Ｐｄ讨论区内胶东群为脉状金矿形成的矿源层。对区内分布的动力变质岩及动力变质作用进行讨论，认识了韧性剪切作用形成的糜棱岩化花岗岩过程。In this region, there are six types of metamorphic rock:(1)GneiSstype;(2)Amphibolitetype;(3)Leptynite and leptite type;(4)Schist type;(5)Sham type;(6)Marble type.Through rehabititation of earlier rock,a large amount of the gneiss type of rocks are intermediate basic volcanic rock in alkalic volcanic rock series, tuff and parts of wacke in terrigenous clast; ampliibolited type is ultramafic volcanic rock of complex genesis.The rest are marine factes sediments mixed up with a little tuff. Through the analysis of An/Pd,the researchers decided that Jiao Dong group is the source bed of gold veill depoSits.(By discussing dynamometamorphism and dynamometamorphic rock in the region, the researchers have recognized the development process of mylonitization granite through the action of ductile shearing.

关 键 词：金矿床 变质岩学 胶东群 矿源层 

分 类 号：P618.510.5[天文地球—矿床学] P588.3[天文地球—地质学]