西秦岭成矿带区域成矿规律概论  

Discussion on the Metallogenic Regularity in West Qinling Metallogenic Belt,China

作　　者：姜寒冰[1] 杨合群[1] 赵国斌[1] 谭文娟[1] 温志亮[1] 李宗会[1] 辜平阳[1] 李健强[1] 郭培虹[1] 王永和[1] JIANG Hanbing;YANG Hequn;ZHAO Guobin;TAN Wenjuan;WEN Zhiliang;LI Zonghui;GU Pingyang;LI Jianqiang;GUO Peihong;WANG Yonghe(Xi’an Center of China Geological Survey,Xi’an 710054,Shaanxi,China)

机构地区：[1]中国地质调查局西安地质调查中心,陕西西安710054

出　　处：《西北地质》2023年第2期187-202,共16页Northwestern Geology

基　　金：中国地质调查局“祁连–秦岭铜镍钴金战略性矿产调查评价”项目(DD20230334);“中国矿产地质志”项目(DD20160346、DD20190379、DD20221695)下属子项目“西北地区区域成矿规律研究与总结”联合资助。

摘　　要：西秦岭成矿带(Ⅲ-28)已发现44种矿产,包括能源矿产4种、金属矿产15种、非金属矿产23(包括洮砚石)种、水气矿产2种。已发现各类矿产地675处,其中超大型8处、大型31处、中型80处、小型276处、矿点280处。按成矿亚带展现的成矿强度排序:合作–西和–凤县成矿亚带(Ⅳ-28①)>兴海–碌曲–徽县成矿亚带(Ⅳ-28②)>迭部–武都–留坝成矿亚带(IV-28③)>玛曲–九寨沟–三河成矿亚带(IV-28④)。按地质时代展现的成矿强度排序:中生代(Mz)>晚古生代(Pz2)>新生代(Cz)>早古生代(Pz1)。笔者按矿种和矿床类型全覆盖原则,对西秦岭成矿带厘定了矿床成矿系列11个,解析出矿床成矿亚系列20个及矿床式66个;基于矿床成矿亚系列的成矿时代–成矿作用–构造环境综合图解,建立了该成矿带区域成矿模式。西秦岭成矿带成矿演化的驱动力,内生动力占主要地位,外生动力占次要地位。华力西期的逐步拉张裂陷和印支期的强烈挤压造山,是西秦岭成矿带成矿最优势的地球动力学背景。The West Qinling metallogenic belt(Ⅲ-28)has discovered 59 minerals,including 4 energy minerals,28 metal minerals,25 non–metal minerals,and 2 aqueous and gaseous minerals;675 various mineral orefield have been discovered,including 8 super-large,31 large,80 medium,276 small,and 280 mineral occurrences.Mineralization intensity by West Qinling metallogenic sub–belt:Guide–Xihe–Fengxian metallogenic sub–belt(Ⅳ-28①)>Xinghai–Luqu–Huixian metallogenic sub–belt(Ⅳ-28②)>Diebu–Wudu–Liuba metallogenic sub–belt(Ⅳ-28③)>Maqu–Jiuzhaigou–Sanhe metallogenic sub–belt(Ⅳ-28④).Mineralization intensity by geological age:Mesozoic(Mz)>Late Paleozoic(Pz2)>Cenozoic(Cz)>Early Paleozoic(Pz1).Based on the principle of full coverage of mineral species and deposit types,this paper identifies 11 deposit metallogenic series,20 deposit metallogenic subseries and 66 deposit types in the West Qinling metallogenic belt;establishes a regional metallogenic model for the West Qinling metallogenic belt based on the comprehensive diagram of metallogenic age-metallogenic action-tectonic environment of deposit metallogenic subseries.The dynamics of metallogenic evolution of the West Qinling mineralization belt is dominated by endogenous dynamics and secondary by exogenous dynamics.The most advantageous geodynamic setting for the West Qinling mineralization belt is the gradual extensional rifting of the Variscan and the intense extrusion orogeny of the Indosinian.

关 键 词：成矿系列 成矿模式 成矿演化 地球动力学背景 西秦岭成矿带 

分 类 号：P612[天文地球—矿床学]