青海省都兰地区矽卡岩型铁多金属矿地质特征及成矿规律  

Geological Characteristics and Metallogenic Regularities of the Skarn Iron Polymetallic Deposits in the Dulan Area,Qinghai Province

作　　者：张占玉[1,2] 张永胜 李华 钟良燕 于德利 刘光莲 石天成 

机构地区：[1]中国地质大学(北京),北京100083 [2]青海省第三地质矿产勘查院,青海西宁810008 [3]青海省水文地质工程地质环境地质调查院,青海西宁810008

出　　处：《地质与勘探》2011年第6期994-1001,共8页Geology and Exploration

基　　金：中国地质调查局地质调查项目(编号:1212010881636)资助

摘　　要：青海省都兰地区位于东昆仑成矿带东段、祁漫塔格-都兰构造岩浆带中,发育矽卡岩型铁多金属矿。本文基于详细的区域地质和矿床地质特征描述,总结了矽卡岩型铁多金属矿床的主要控矿因素、成矿规律和成矿模式,提出主要找矿标志。认为该类矿床大多产于中酸性花岗质侵入岩与寒武系-奥陶系滩间山群和石炭系地层接触带及外接触带部位,中-晚三叠世是主要成矿期,滩间山群或石炭系碳酸盐岩或含钙、镁质成分较高的泥砂质沉积建造、印支期中酸性花岗岩、磁异常、NW或NE向断裂构造是区域上最佳的矿产预测要素组合,具有良好的找矿前景。The Dulan area in Qinghai Province is located in the eastern part of the East Kunlun metallogenic belt and the Qimantage-Dulan magmatic tectonic belt, where many skarn iron polymetallic deposits are developed. In this paper, based on extensive description of regional geology and deposit characteristics, major ore-controlling factors, metallogenic regularities, ore-forming model and prospecting indicators of the iron polymetallic deposits （occurrences） in the Dulan area are determined. The results show that most iron polymetallic deposits in this region occurred in the inner- and outercontact belt between high-potassium calc-alkaline granitic plutons and Cambrian-Ordovician Tanjianshan Group and Carboniferous sedimentary sequence. Middle-late Triassic is an important metallogenic epoch for skarn iron polymctallic deposits. The Tanjianshan Group and Carboniferous carbonate, and Ca- and Mg-rich sedimentary sequence, Indosinian intermediate to acidic intrusion rocks, magnetic anomalies and NW and NE striking faults are favorable factors for metallogenic prediction, which indicate fairly good prospecting potential in the Dulan area.

关 键 词：矽卡岩型铁多金属矿 矿床地质 成矿规律 成矿模式 青海都兰地区 

分 类 号：P624.6[天文地球—地质矿产勘探]