内蒙古大兴安岭地区火山岩型铅锌矿矿产预测

Minerals resource prediction of the volcanic lead-zinc deposits in the Greater Khingan Range of Inner Mongolia

内蒙古自治区已发现的火山岩型铅锌矿(陆相)规模较大,集中分布于大兴安岭地区,与中晚侏罗世火山活动联系密切,已知矿床的深部及外围找矿潜力巨大。依据前人的地质、矿产、物探、化探等资料,采用"火山岩型"预测方法类型,分别以比利亚谷铅锌矿、甲乌拉铅锌矿和扎木钦铅锌矿作为典型矿床,在全区选取比利亚谷、甲乌拉和扎木钦3个预测工作区进行矿产预测。圈定铅锌矿最小预测区109个,其中A级最小预测区18个,B级最小预测区37个,C级最小预测区54个。预测334-1级别Pb+Zn总资源量1732548t,334-2级别Pb+Zn总资源量588930t,334-3级别Pb+Zn总资源量4608682t。可利用的Pb+Zn总资源量为3179267t。反映内蒙古大兴安岭地区中生代火山岩型铅锌矿(陆相)找矿潜力较大。

Large-scale volcanic lead-zinc deposits have been discovered in Inner Mongolia. They are concentrated in the Greater Khingan Range and closely related with the Middle-Late Jurassic volcanic activities, and have a great prospecting potential in the deep area of the deposits and their peripheral area. Combined with the previous geological mineral resource, geophysical and geochemical data and taking the Biliyagu, Jiawula and Zhamuqin lead-zinc deposits as typical deposits, this work used the volcanic type prediction methods to conduct metallogenic prediction for the Biliyagu, Jiawula and Zhamuqin prediction areas. We delineated 109 minimum prediction areas,including 18 A types, 37 B types and 54 C types. In addition, the total amount of lead and zinc resources was determined,including 1 732 548 t of 334-1 type resources, 588 930 t of 334-2 type and 4 608 682 t of 334-3 type. The total amount of the available lead and zinc resources is 3 179 267 t. This suggests a great potential for prospecting Mesozoic continental volcanic lead-zinc deposits in the Greater Khingan Range of Inner Mongolia.