摘要
阿尼玛卿山地区是我省铜矿重要成矿带之一。本文阐述了区内超基性岩带与铜矿成矿特征及找矿标志,对矿床成因进行了探讨;认为本区位于古特提斯海北缘俯冲带中的蛇绿混杂岩带内,代表了古板块的缝合线,超镁铁质岩、具堆晶特征的辉长岩、玄武岩等具有蛇绿岩的特征,是构造冷侵位产物;确定了两个含矿层序,划分了两种成矿类型:一种产在蛇绿岩组合下部的超基性岩中,如德尔尼铜钴矿床,另一种产在蛇绿岩组合上部层序的火山岩及火山碎屑岩中,如牧羊山铜矿;介绍了成矿预测区地质、矿(化)体及物探异常主要特征,指出了测区中最佳找矿地段,明确了在该地区普查找矿的方向。
The A' nyemaqen Mountain area is an important Cu-mineralizing belt in QinghaiProvince. The authors have explained the Cu-mineralizing characteristics and prospectingcriteria of the ultrabasic rock belt, and probed the genesis of the deposit. The authors sug-gest that this area may be located in the ophiolitic melange. suite of northern subduction zoneof ancient Tethys ocean and present the suture line of paleoplates. Indicated by ultramaficrock, gabbro with cumulus crystal, basalt, and so on, the ophiolite may be the production oftectonic cold emplacement. Two kinds of ore-bearing successions have been determined astwo kinds of metallogenic types. The one was formed in the ultrabasic rocks of lower ophio-lite suite such as Derni Cu-Co deposit, and another in the volcanic or pyroclastic rocks ofupper ophiolite suite such as Muyangshan cu deposit. At last the geology, main features ofmineralized bodies and geophysical anomalies, and the better mineralization sections of prog-nosis areas have been summarized to benefit future prospect.
关键词
蛇绿混杂岩带
成矿特征
找矿预测
铜矿床
A'nyemaqen mountains
ophiolite suite
Cu-mineralized characteristic
metal lognic prognosis
