摘要
根据滇西地区与板块活动有关的火山岩带、中-酸性侵入岩带及基性-超基性岩带的稀土、微量元素及岩石化学特征所反映的构造环境资料,结合基底地质构造及地层古生物、古地磁资料,对区内的大地构造进行了综合判断,划分为两大板块、四条板块结合带及其相应的岛弧带、弧后带,以及三个地体。系统研究了区内主要有色金属矿床的硫、氢、氧、铅、锶、碳同位素资料,结合区域地球化学背景含量,对兰坪金顶铅锌矿、哀牢山金矿、西盟新厂铅银矿等几个主要矿床的控矿因素和成因类型提出一些新的认识。按矿床分布的大地构造单元,划分出滇西地区14个有色金属矿产成矿带。按不同矿种讨论了成矿的区域地质背景,提出了找矿方向。
According to the tectonic environment reflected by the rare-earth, trace element and petrochemistry characters of the volcanic rock belts, intermediate-acidic and basic-ultrabasic intrusion belts related to the plate activity in we-stern Yunnan region, combined with the information of the basement struc-ture, stratigraphic paleontology and oaleomagnetism, this paper comprehensi-vely judges the geotectonics of this region and divides it into two large pla-tes, four stripe of plate connected zones and corresponding island arc zones, back-arc zones as well as three terrenes. Some new views on the ore control factors and genetic types for several main deposits such as the Lanping Jind-ing lead-zinc ore, Ailaoshan gold ore and Ximeng Xinchang lead-silver ore have been provided from the systematic study of the isotopic data of S, H, O, Pb, Sr, C in major non-ferrous metal deposits as well as the background con-tent of regional geochemistry. Based on the geotectonic units in which the ore deposits distribute, 14 non-ferrous metal metallogenic belts are divided, the metallogenically regional geological setting and direction of prospecting are also discussed in accordance with different categories of ore.
出处
《云南地质》
1991年第1期11-43,共33页
Yunnan Geology
