胡家峪铜矿床大地构造位置处于华北克拉通中部造山带南缘的中条山地区，矿床主要赋存于古元古界中条群篦子沟组含碳片岩、不纯大理岩和硅质钠长岩等岩石中，次为余家山组白云石大理岩中。对矿区内的含矿岩系进行了全岩地球化学测试分析，主量元素特征表明矿区内的含矿岩系均表现出富镁、富铝的特征；微量元素特征显示，所有样品均呈现出Nb、Ta、Ti负异常的现象，显示出与俯冲带岩浆地球化学类似的特征；稀土元素特征显示出一定程度的轻重稀土分馏，轻稀土富集，所有样品都表现出不同程度的铕负异常，表明这些含矿岩系形成于还原沉积环境中。研究认为，胡家峪铜矿床的成矿构造背景为俯冲后形成的弧后盆地；容矿岩石与国内典型热水喷流矿床相比，在地球化学特征方面有一定相似之处。因此，胡家峪铜矿床应为热水喷流沉积矿床。
Hujiayu Copper Deposit is located in Zhongtiao Mountain , south part of central orogenic belt of the North China Craton,mainly hosted in rocks such as carbonaceous schist ,impure marbles and silica albitite in Paleo-proterozoic Erathem,Zhongtiao Group,Bizigou formation,and minor in dolomite marble in Yujiashan formation .Ac-cording to whole-rock geochemical test and analysis of ore-bearing rocks within the deposit ,characteristics of major el-ements indicate that ore-bearing rocks are all enriched with Mg and Al;characteristics of trace element show negative anomaly of Nb,Ta and Ti in all samples ,similar geochemical characteristics of magma in subduction zone;The rare-earth elements are featured by LREE/HREE fractionation ,LREE enrichment and negative Eu anomaly in all samples , showing the ore-bearing rocks formed in reduction sedimentary environment .The research show that tectonic settings of Hujiayu copper deposit genesis is back-arc basin formed after subduction;Ore-bearing rocks suggest similarities in ge-ochemical characteristics with other domestic typical exhalative sedimentary deposits ,making Hujiayu Copper Deposit regarded to be an exhalative sedimentary deposit .
参考文献
| [1] | 谭少华 .山西中条山胡-篦型铜矿床成矿地质条件及矿床成因[J].西南工学院学报,1997,12(02):60-63. |
| [2] | 《中条山铜矿地质》编写组.中条山铜矿地质[M].北京:地质出版社,1978 |
| [3] | 孙大中;胡维兴.中条山前寒武纪年代构造格架和年代地壳结构[M].北京:地质出版社,1993 |
| [4] | 胡维兴;孙大中 .中条山早元古代铜矿成矿作用与演化[J].地质学报,1987,62(02):152-165. |
| [5] | 刘亮明;陈国达;彭省临 等.中条山地区地壳递进演化与胡-篦型铜矿床的成因[J].中南工业大学学报,1999,30(04):354-358. |
| [6] | 张晗 .山西中条山北段古元古代铜矿成矿作用[D].长春:吉林大学,2010. |
| [7] | 庞雪娇 .山西中条山南和沟、老宝滩铜矿床矿化富集规律及矿床成因探讨[D].长春:吉林大学,2010. |
| [8] | 许庆林,孙丰月,张晗,霍亮.山西中条山铜矿峪铜矿流体包裹体、锆石U-Pb年龄、Hf同位素及其地质意义[J].吉林大学学报（地球科学版）,2012(z3):64-80. |
| [9] | 赵永瑞,真允庆.试论中条山胡篦型铜矿床喷流成因[J].桂林工学院学报,2006(03):310-319. |
| [10] | 黄维平,孙丰月,张晗,王佳良.山西中条山胡篦型铜矿床岩石地球化学特征[J].世界地质,2013(02):212-220. |
| [11] | Wilson M.Igneous petrogenesis a global tectonic approach[M].London:Chapman and Hall,1989 |
| [12] | Sun S S;Mcdonough W F.Chemical and isotopic systematic sod o-cean basins：Implications for mantle composition and processes[A].London:Geological Society of London and Blackwell Scientific Pub-lications,1989:313-345. |
| [13] | 陶铨.中条山地区前寒武纪地层的时代[A].北京:地质出版社,1985:29-37. |
| [14] | Zhao, G.;Cawood, P.A.;Li, S.;Wilde, S.A.;Sun, M.;Zhang, J.;He, Y.;Yin, C..Amalgamation of the North China Craton: Key issues and discussion[J].Precambrian Research,2012:55-76. |
| [15] | 祝朝辉,刘淑霞,张乾,谷德敏.云南白牛厂银多金属矿床喷流沉积成因证据：容矿岩石的地球化学约束[J].现代地质,2010(01):120-130. |
| [16] | 谢桂青,胡瑞忠,方维萱,漆亮.云南墨江金矿热水喷流沉积成岩成矿的地质地球化学证据[J].沉积学报,2002(03):387-393. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%