| 唐永忠,朱增伍,吴昊,祝国柱,魏东,姚珊.南秦岭镇旬盆地微细浸染型金矿矿化特征与成矿动力学机制[J].矿产勘查,2016,7(2):307-315 |
| 南秦岭镇旬盆地微细浸染型金矿矿化特征与成矿动力学机制 |
| Mineralization characteristics of submicro disseminated type gold deposits and dynamic metallogenic mechanism in Zhen’an- Xunyang basin, southern Qinling mountain blet |
| 投稿时间：2015-04-09 |
| DOI： |
| 中文关键词: 南秦岭 镇旬盆地 微细浸染型金矿 成矿地质特征 动力学机制 |
| 英文关键词: southern Qinling mountain, Zhen’an-Xunyang basin, submicro disseminated type gold deposits, mineralization characteristics, dynamic metallogenic mechanism |
| 基金项目:中国地质调查局矿产资源评价项目(编号:200110200029、1212011085109)资助。 |
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| 中文摘要: |
| 南秦岭镇安—旬阳地区早古生代为一裂陷沉积盆地,发育一套碳酸盐岩与细碎屑岩沉积建造,形成规模巨大独具特色的以金、汞锑矿为主的多金属成矿带。其金矿主要受地层岩性、构造、沉积相与热水活动多因素控制,具有微细浸染型金矿典型的Au-As-Hg-Sb-W地球化学元素组合,主要载金矿物为含砷黄铁矿、毒砂,具低温矿物组合。印支运动是区内早中生代的一次非常重要的区域性构造运动,使扬子、华北板块与秦岭微板块完成最终的拼合,秦岭地壳大幅度缩短,南秦岭呈多层次的逆冲推覆,最终形成一系列由北向南逆冲的叠瓦式薄皮构造。区域构造应力以南北方向为主,南秦岭经历了4期构造变形,形成了不同的构造形态,岩浆活动也非常强烈。在印支期主构造成矿期之后,受燕山期成矿作用的影响,并叠加于印支期成矿之上,形成了区内众多的以金为主的多金属造山型矿床。 |
| 英文摘要: |
| The Zhen’an-Xunyang basin located in southern Qinling mountain belt is a Early Paleozoic sedimentary basin. The sedimentary formation consists of a suit of carbonate and clastic rocks and a large-scaled Au-Hg-Sb polymetallic metallogenic belt was formed in the basin. The gold mineralization is jointly controlled by stratigraphic lithology, structure, sedimentary facies and hydrothermal activity with typical geochemical element combination of Au-As-Hg-Sb-W which occurs in submicro disseminated type gold deposit. The main gold-bearing minerals are arsenic pyrite, arsenopyrite and low-temperature minerals. Indo-China movement is a very important early Mesozoic regional tectonic movement in the basin area, which resulted in the final amalgamation of the Qinling mirco-plate with Yangtze plate and North China plate and greatly thinning of Qinling crust as well as the multi-layer thrust nappe in the south Qinling mountain area. Eventually, the thin-skinned structure of imbricated thrust from north to south is formed. Regional tectonic stress is given priority to north-south direction. After experiencing four periods of tectonic deformation, multiphase tectonic deformation style is formed in the southern Qinling mountain area, and also the magmatic activity is very active. After main tectonic mineralization period formed in Indo - China epoch, then overprinted by the mineralization formed Yanshan period, numerous gold polymetallic orogenic type deposits are formed in the basin area. |
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