西秦岭北带丹凤群发育特征及金找矿方向  

ON GEOLOGICAL CHARACTERISTICS AND GOLD PROSPECTING OF THE DANFENG GROUP IN THE NORTHERN BELT OF WEST QINLING AREA

作　　者：杜玉良 李林科 

机构地区：[1]甘肃地勘局 [2]甘肃地勘局第一地质队

出　　处：《甘肃地质学报》1999年第1期1-5,共5页Acta Geologica Gansu

摘　　要：位于西秦岭北带的丹凤群是一套浅—中等变质的绿片岩系，原岩为一套以基性—中酸性火山岩为主夹正常陆源碎屑岩、碳酸盐岩的岩石组合。该变质岩系分布区金的地球化学丰度高，断裂作用和岩浆活动十分强烈。丹凤群兼具基性—中酸性火山岩、印支—燕山期断裂构造及中酸性岩体“三位一体”The Danfeng Group located on the northern belt of West Qinling area is a series of epizonal-middle metamorphic greenschist and has high geochemical abundance of gold.In this belt faults and magmatism were strongly developed.We think that in the Danfeng Group the places where intermediate-acid-basic volcanic rocks,Yanshanian-Indosinian faults and intermediate-acid intrusions appeared together are the favorable minerogenic places for gold.

关 键 词：西秦岭北带 丹凤群 发育特征 金矿床 找矿方向 

分 类 号：P618.510.8[天文地球—矿床学] P536[天文地球—地质学]