鹿儿坝金矿床是西秦岭地区的一处中型金矿床，赋矿围岩主要为中三叠统光盖山组长英砂岩、粉砂岩及粉砂质板岩等。在对矿床野外地质特征、矿石矿物组成、矿石结构构造、成矿元素组合详细研究的基础上，认为该区金矿体主要受近EW向脆性断裂构造控制，与闪长玢岩脉关系密切；矿石中金属矿物主要为黄铁矿、毒砂、辉锑矿、闪锌矿；石英、黄铁矿、毒砂为主要载金矿物，矿石类型主要有蚀变构造角砾岩型、蚀变闪长玢岩型、脉状及浸染状硫化物型、褐铁矿化碎裂岩型；流体测温、矿物组合及蚀变特征显示本区为中低温热液金矿床；硫、铅同位素研究结果表明，成矿物质具有深源特征。结合区域矿床研究结果，认为鹿儿坝金矿床形成于印支末期，为与闪长岩脉有关的斑岩型－蚀变岩型金矿床，矿床剥蚀深度较浅，目前所见到金矿体可能大部分为闪长玢岩脉（体）上部破碎带中的蚀变岩型金矿床，深部具有较大的成矿和找矿潜力。
Lu'erba Gold Deposit in Min County is a middle gold deposit in western Qinling region.The deposit mainly lies in sandstones,siltstones and silty slates of middle triassic felsic Guanggaishan group.This paper based on the detailed study of Lu'erba Gold Deposit's field geological characteristics,ore mineral constituents,ore textures and structures and ore element association,identifies that the gold deposit is mainly controlled by EW brittle faults and has close relations with diorite-porphyrite;The main ore minerals are pyrite,arsenopyrite,stibnite and sphalerite.Pyrite, arsenopyrite and quartz are the main gold-bearing minerals.The types of ore are altered tectonic breccia,altered diori te-porphyrite,veined and disseminated sulfide ores and cataclastic rock of ferritization;Fluid temperature,mineral as-semblages and alteration features indicate that the area is characterized by low-temperature hydrothermal gold deposit;Study of sulfur and lead isotopes indicates that Lu'erba Gold Deposit is a medium-low temperature hydrothermal depos-it.Combined with the findings of the regional metallogenesis,the deposit is thought to be formed in the end period of Indosinian Movement and be a porphyry-altered rock type gold deposit which is related to the diorite-porphyrite,and the deposit's disintegrated thickness is thin.For now the seen gold orebodies mostly may be alteration type gold depos-its in upper broken belt of diorite-porphyrite veins( body) .There are great potentials for mineralization and prospec-ting.
参考文献
| [1] | 吴烈善;韦龙明 .鹿儿坝金矿床地质特征与找矿标志[J].矿产与地质,1998,12(05):324-328. |
| [2] | 司国强;李通国 .鹿儿坝金矿床地质特征及控矿因素分析[J].甘肃地质学报,2000,9(01):59-65. |
| [3] | 张国伟.秦岭造山带的形成及演化[M].西安:西北大学出版社,1987:1-16. |
| [4] | 杨恒书;张凤岭;殷鸿福 等.西秦岭造山带演化与成矿[J].四川地质学报,1996,16(01):73-79. |
| [5] | 冯益民,曹宣铎,张二朋,胡云绪,潘晓萍,杨军录,贾群子,李文明.西秦岭造山带的演化、构造格局和性质[J].西北地质,2003(01):1-10. |
| [6] | 张国伟,郭安林,姚安平.中国大陆构造中的西秦岭-松潘大陆构造结[J].地学前缘,2004(03):23-32. |
| [7] | 张国伟;张本仁;袁学诚.秦岭造山带与大陆动力学[M].北京:科学出版社,2001 |
| [8] | 朱赖民,张国伟,刘家军,姚安平,杨涛,王飞,李犇,郭波.西秦岭-松潘构造结中的卡林型-类卡林型金矿床：成矿构造背景、存在问题和研究趋势[J].矿物学报,2009(z1):201-204. |
| [9] | 翟裕生.区域构造、地球化学与成矿[J].地质调查与研究,2003(01):1-7. |
| [10] | 胡受奚;林潜龙;陈泽铭.华北与华南古板块拼合带地质和成矿[M].南京:南京大学出版社,1988:442-489. |
| [11] | 陈毓川,王平安,秦克令.秦岭地区主要金属矿床成矿系列的划分及区域成矿规律探讨[J].矿床地质,1994(04):289-298. |
| [12] | 姚书振,丁振举,周宗桂,陈守余.秦岭造山带金属成矿系统[J].地球科学-中国地质大学学报,2002(05):599-604. |
| [13] | 陈衍景,张静,张复新,Franco PIRAJNO,李超.西秦岭地区卡林-类卡林型金矿床及其成矿时间、构造背景和模式[J].地质论评,2004(02):134-152. |
| [14] | 赵彦庆,叶得金,李永琴,陈国忠.西秦岭大水金矿的花岗岩成矿作用特征[J].现代地质,2003(02):151-156. |
| [15] | 蒙轸,康喜逢,杨怀玉.甘肃省岷县簸箕沟金矿地质特征及成因[J].地质与勘探,2007(05):40-44. |
| [16] | Zartman R E;Doe B R .Plumbotectonics-the model[J].Tectono-physics,1981,75:135-162. |
| [17] | 刘云华,刘怀礼,黄绍峰,高洪兴,张永强,李志国,郑绪忠.西秦岭李子园碎石子斑岩型金矿床地质特征及成矿时代[J].黄金,2011(07):12-18. |
| [18] | 肖力,张继武,崔龙,赵玉锁,潘爱军,邹依林,韩先菊,张勇.西秦岭地区金矿控矿因素和资源潜力分析[J].黄金,2008(07):12-17. |
| [19] | 牛翠祎,薛为民,李绍儒,卿敏.西秦岭成矿带金矿资源综合信息预测评价[J].黄金科学技术,2009(02):1-7. |
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