摘要
内蒙古达茂旗北部岩浆岩分布广泛,以加里东期和华力西晚期为主。加里东期侵入岩以闪长岩、石英闪长岩及斜长花岗岩为主;华力西晚期侵入岩以闪长岩、石英闪长岩、黑云母花岗岩、二长花岗岩及钾长花岗岩为主。经研究发现,铜矿化多与闪长岩、石英闪长岩及花岗闪长岩有关;金矿化多与石英闪长岩、斜长花岗岩及黑云母花岗岩有关;铜、金矿床(点)均产于岩体内或其外接触带的火山岩中,暗示铜、金矿(点)的形成与岩浆活动密切相关。进一步研究发现本区铜、金矿化主要受华力西晚期岩浆活动控制。通过对研究区成矿地质背景的讨论及与斑岩型铜、金矿床地质特征的对比,指出本区具备寻找斑岩型铜、金矿床的潜力。
Magmatic rocks are widely distributed in northern Damaoqi,which were mainly formed in the Caledonian and late Variscan periods. The Caledonian intrusive rocks are dominated by diorite, quartz diorite and plagiogranite, and the late Variscan intrusives include diorite, quartz diorite, biotite granite, monzogranite and K - feldspar granite. The copper mineralization is related to the diorite, quartz diorite and granodiorite. And the gold mineraliza-tion is related to the quartz diorite, plagioclase granite and biotite granite. The copper and gold deposits （occurrences） both occur in rock bodies or volcan-ic rocks in outer contact zones, suggesting that the formation of the copper and gold （occurrences） is closely associated with the magmatic activities. Fur- ther study reveals that the copper and gold mineralization is controlled by magmatie activities in the late Variscan. From geological setting and comparison of geological features of porphyry copper and gold deposits,this work suggests that this area has a potential of finding porphyry copper and gold deposits.
出处
《地质与勘探》
CAS
CSCD
北大核心
2013年第2期224-235,共12页
Geology and Exploration
基金
中国地质调查局项目(1212011120721)资助
关键词
岩浆活动
铜(金)矿床
成矿作用
达茂旗
内蒙古
magmatic activity, copper （gold） deposit, mineralization, Damaoqi, Inner Mongolia
