湖南黄金洞金矿床白钨矿Sm-Nd年龄及其地质意义
Scheelite Sm-Nd age of the Huangjindong Au deposit in Hunan and its geological significance
查看参考文献111篇
|
文摘
|
黄金洞金矿床是江南造山带上重要的金矿产地之一,矿体赋存在新元古代的浅变质岩中,受东西向-北西西向构造的严格控制。多年来,黄金洞金矿床的成矿年龄一直存在着争议。通过对黄金洞金矿区的白钨矿开展详细的野外调查、岩相学观察和Sm-Nd同位素分析,在~(147)Sm/~(144)Nd-~(143)Nd/~(144)Nd图解中获得白钨矿的等时线年龄为(129.7±7.4) Ma(MSWD=1.0),对应的ε_(Nd)(t)值为–8.21~ –8.68。结合黄金洞矿区白钨矿与含金硫化物的交切关系观察、以及前人的成矿年代学和矿物学研究成果,认为白钨矿的等时线年龄可作为黄金洞金矿床的成矿年龄。白钨矿的ε_(Nd)(t)值大于赋矿地层新元古界冷家溪群和湘东北早白垩世花岗岩,但小于新元古界仓溪岩群,表明白钨矿中的Nd部分来自新元古界冷家溪群和(或)湘东北早白垩世花岗岩,部分来自新元古界仓溪岩群。综合前人的研究,认为在江南造山带的金锑钨成矿作用中,新元古界为矿源层,区域变质作用和岩浆作用共同促进了金等成矿物质的活化,构造活化为含矿热液的运移和沉淀提供了通道和空间。 |
|
其他语种文摘
|
The Huangjindong gold deposit is one of the most important Au reserve in the Jiangnan Orogenic Belt. Its orebodies are strictly controlled by a series of E- to WNW-trending faults developed in low-grade metamorphic Neoproterozoic strata. However, the mineralization age of the Huangjindong deposit has not been constrained. Detailed field surveys, petrographic observations and Sm-Nd isotopic analyses have been carried out on scheelites in the Huangjindong deposit area. The scheelites yield an isochron age of 129.7±7.4 Ma (MSWD=1.0) on the ~(143)Nd/~(144)Nd versus ~(147)Sm/~(144)Nd plot, with corresponding ε_(Nd) (t) values varying from –8.21 to –8.68. Based on the crosscutting relationship of the scheelite vein and Au-bearing sulfide vein in the Huangjindong deposit, and the previous studies on geochronology and mineralogy, the isochron age of scheelites is considered to be the mineralization age of the Huangjindong gold deposit. The ε_(Nd) (t) values of scheelites are higher than those of the ore-bearing Neoproterozoic Lengjiaxi Group and early Cretaceous granitoids in northeastern Hunan but lower than those of the Neoproterozoic Cangxiyan Group, indicating that Nd in the scheelites partly originate from the Neoproterozoic Lengjiaxi Group and/or the early Cretaceous granitoids in northeastern Hunan, and partly from the Neoproterozoic Cangxiyan Group. Combined with previous research, ore materials of the Au-Sb-W deposits in the Jiangnan Orogenic belt are interpreted to be sourced from the Neoproterozoic strata owing to regional metamorphism and magmatic activities are interpreted to have facilitated the reactivation of ore-forming materials such as Au. Structural reactivation was interpreted as the source of channels and space for ore-fluids during the Au-Sb-W ore-forming process in the Jiangnan Orogenic Belt. |
|
来源
|
地球化学
,2021,50(4):381-397 【核心库】
|
|
DOI
|
10.19700/j.0379-1726.2021.04.005
|
|
关键词
|
金矿床
;
白钨矿
;
Sm-Nd同位素
;
湘东北
;
江南造山带
|
|
地址
|
1.
中国科学院广州地球化学研究所, 中国科学院矿物学与成矿学重点实验室, 广东, 广州, 510640
2.
中国科学院大学, 北京, 100049
3.
湖南省地质矿产勘查开发局四〇二队, 湖南, 长沙, 410004
4.
东华理工大学, 核资源与环境国家重点实验室, 江西, 南昌, 330013
5.
湖南黄金洞矿业有限责任公司, 湖南, 岳阳, 414507
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
0379-1726 |
|
学科
|
地质学 |
|
基金
|
国家自然科学基金
;
湖南省自然资源厅科技项目
;
湖南省矿产资源深部探测研究中心
;
国家重点研发计划
|
|
文献收藏号
|
CSCD:7086909
|
参考文献 共
111
共6页
|
|
1.
Bell K. Sm-Nd and Rb-Sr isotope systematics of scheelites: Possible implications for the age and genesis of vein-hosted gold deposits.
Geology,1989,17(6):500-504
|
被引
45
次
|
|
|
|
|
2.
陆松年. 成矿地质事件的同位素年代学研究.
地学前缘,1999,6(2):335-342
|
被引
23
次
|
|
|
|
|
3.
Fryer B J. Sm-Nd direct dating of the Collins Bay hydrothermal uranium deposit, Saskatchewan.
Geology,1984,12(8):479-482
|
被引
14
次
|
|
|
|
|
4.
Surya Prakash Rao K. Scheelite as a prospecting tool for gold in the Ramagiri greenstone belt, Andhra Pradesh, India.
J Geochem Explor,1989,31(3):307-317
|
被引
1
次
|
|
|
|
|
5.
Ghaderi M. Rare earth element systematics in scheelite from hydrothermal gold deposits in the Kalgoorlie-Norseman region, Western Australia.
Econ Geol,1999,94(3):423-437
|
被引
61
次
|
|
|
|
|
6.
Boyle R W. The geochemistry of gold and its deposits.
Geol Surv Can Bull,1979,280:579-584
|
被引
1
次
|
|
|
|
|
7.
Raimbault L. REE fractionation between scheelite and apatite in hydrothermal conditions.
Am Mineral,1993,78:1275-1285
|
被引
14
次
|
|
|
|
|
8.
Brugger J L. Oxidation state of europium in scheelite: Tracking fluid-rock interaction in gold deposits.
Mineral Mag,2008,257(1/2):0-33
|
被引
1
次
|
|
|
|
|
9.
Anglin C D. Sm-Nd dating of scheelite and tourmaline; implications for the genesis of Archean gold deposits, Val d'Or, Canada.
Econ Geol,1996,91(8):1372-1382
|
被引
27
次
|
|
|
|
|
10.
Darbyshire D P F. Late Archean and Early Proterozoic gold-tungsten mineralization in the Zimbabwe Archean craton: Rb-Sr and Sm-Nd isotope constraints.
Geology,1996,24(1):19-22
|
被引
11
次
|
|
|
|
|
11.
彭建堂. 湘西沃溪Au-Sb-W矿床中白钨矿Sm-Nd和石英Ar-Ar定年.
科学通报,2003,48(18):1976-1981
|
被引
60
次
|
|
|
|
|
12.
Zhang Z Y. Sm-Nd Dating and in-situ LA-ICP-MS trace element analyses of scheelite from the Longshan Sb-Au deposit, Xiangzhong metallogenic province, South China.
Minerals,2019,9
|
被引
1
次
|
|
|
|
|
13.
史明魁.
湘中锑矿,1994:1-151
|
被引
16
次
|
|
|
|
|
14.
张金春.
江西金山韧性剪切型金矿成矿地球化学研究,1994
|
被引
3
次
|
|
|
|
|
15.
陈好寿. 浙江璜山金矿床同位素地球化学研究.
浙江地质,1996,12(1):74-82
|
被引
2
次
|
|
|
|
|
16.
彭建堂. 雪峰地区金矿成矿时代问题的探讨.
地质与勘探,1998,34(4):37-41
|
被引
30
次
|
|
|
|
|
17.
王秀璋. 金山金矿成矿年龄测定及华南加里东成金期的讨论.
地质论评,1999,45(1):19-25
|
被引
35
次
|
|
|
|
|
18.
朱笑青. 黔东南金矿形成时代的确定兼论湘黔加里东金矿带.
中国地质,2006,33(5):1092-1099
|
被引
25
次
|
|
|
|
|
19.
陈富文. 湖南雪峰山地区沈家垭金矿成矿学及年代学研究.
地质学报,2008,82(7):906-911
|
被引
7
次
|
|
|
|
|
20.
董国军. 湘东地区金矿床矿化年龄的测定及含矿流体来源的示踪——兼论矿床成因类型.
大地构造与成矿学,2008,32(4):482-491
|
被引
21
次
|
|
|
|
|
了解气象卫星更多信息，请访问