摘要
澜沧老厂系受燕山期构造控制由上部灰岩与下部火山岩组成统一矿化体的银铅多金属大型矿床。深部钻孔揭露花岗斑岩与矽卡岩铜矿化，说明其成因与隐伏酸性岩体有关。历史遗留由灰岩型矿石提银后的富铅炉渣，其含铅金属量加上灰岩型矿石已探明的铅金属量，相当火山岩型矿石已探明铅金属量的２．５倍。说明灰岩型矿体是矿床的主体。只研究火山岩型而忽略灰岩型铅锌矿的研究，或以火山岩型矿体的成矿特征来说明老厂矿床的整体特征，都是不全面的。
The Laochang deposit is a large of Ag Pb polymetallic deposit controlled by a mineralization unit composed of upper limestone and lower volcanic rock. The deep part is granoporphry and skarn copper mineralization exposed by drilling hole, which indicate the genesis is related to hidden acidic rockbodies. The total Pb metal in the limestone type ore is about 2.5 times larger than that in the volcanic type ore,indicating that the limestone ore is the major ore in the deposit. Thus it would be not complete if only study the volcanic type, but neglect the limestone type Pb Zn ore, or take the mineralization characteristics in volcanic type ore to indicate the whole characterstics in the Laochang deposit.
出处
《矿产与地质》
1998年第1期26-32,共7页
Mineral Resources and Geology
关键词
铅矿床
地质特征
银矿床
多金属矿床
成矿特征
Ag Pb deposit, Geological characteristics, Deposit type, Limestone type, Volcanic type, Laochang, Yunnan
