黔西南碱性超基性脉岩的铂族元素地球化学
PGE Geochemistry of Alkaline Ultramafic Dykes in Southwestern Guizhou Province, China
查看参考文献55篇
|
文摘
|
黔西南出露大范围的碱性超基性脉岩, 其成因研究对了解该地区大规模的金矿形成具有重要意义. 采用卡洛斯管同位素稀释法结合ICP-MS分析了黔西南4个岩区碱性超基性脉岩中的Ni、Ir、Ru、Rh、Pt、Pd和Cu的含量. 结果显示:研究区脉岩铂族元素(PGE)的含量普遍较低, 原始地幔标准化PGE分布模式呈正斜率型;并具有较高的Cu/Pd比值(11903~60210). 综合对比研究表明, 研究区脉岩为地幔低程度部分熔融作用的产物, 原始岩浆具有硫不饱和的特征, 岩浆在上升过程中没有发生明显的硫化物分异, 但发生了一定程度的岩浆分离结晶. 此外, 陇要脉岩可能经历了岩浆上升时铬铁矿的分离结晶作用. |
|
其他语种文摘
|
Studies on the petrogenesis of alkaline ultramafic dykes are helpful to understand the formation of the gold deposits widely distributed in southwestern Guizhou Province, China. The platinum-group elements (PGE) are sensitive indicators of the petrogenesis (e. g., partial melting and silicate fractionation) of mafic-ultramafic rocks. Thus, in this paper, contents of Ni, Cu and PGE (Ir, Ru, Rh, Pt and Pd) were measured by using isotope dilution (ID)-ICP-MS with an improved Carius tube. The studied samples are characterized by low PGE contents, high Cu/Pd (11903-60210) ratios and positive slope in the primitive mantle normalized patterns. Synthetic and comparative studies on the PGE indicate that the ultramafic rocks were derived from low-degree partial melting of the MORB-like mantle. These dyke rocks were formed by the crystallization of the S-unsaturated magma which had not experienced obvious sulfide segregation. The primary magma of the ultramafic rocks, however, underwent extensive fractionation of clinopyroxene, olivine, Ti-bearing phases (e. g., rutile, ilmenite, titanite) and apatite, prior to emplacement. In addition, the Longyao ultramafic dykes experienced differentiation of chromite during primary magma ascent. |
|
来源
|
矿物学报
,2010,30(2):207-214 【核心库】
|
|
关键词
|
PGE
;
超基性脉岩
;
成因
;
黔西南
|
|
地址
|
1.
中国科学院研究生院, 矿床地球化学国家重点实验室, 北京, 100039
2.
中国科学院地球化学研究所, 矿床地球化学国家重点实验室, 贵州, 贵阳, 550002
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
1000-4734 |
|
学科
|
地质学 |
|
基金
|
国家973计划
;
国家自然科学基金项目
;
西北大学大陆动力学国家重点实验室基金
|
|
文献收藏号
|
CSCD:3914306
|
参考文献 共
55
共3页
|
|
1.
朱赖民. 滇-黔-桂微细浸染型金矿床时空分布与成矿流体来源研究.
地质科学,1998,33(4):463-474
|
CSCD被引
37
次
|
|
|
|
|
2.
Zhang X C. Sediment-hosted disseminated gold deposits in Southwest Guizhou, PRC: Their geological setting and origin in relation to mineralogical, fluid inclusion, and stable-isotope characteristics.
International Geology Review,2003,45:407-470
|
CSCD被引
30
次
|
|
|
|
|
3.
刘平. 黔西南金矿成矿地质作用浅析.
贵州地质,2006,23(2):83-92
|
CSCD被引
8
次
|
|
|
|
|
4.
Su W C. Calcite Sm-Nd isochron age of the Shuiyindong Carlin-type gold deposit, Guizhou, China.
Chemical Geology,2008,258:269-274
|
CSCD被引
1
次
|
|
|
|
|
5.
夏勇. 黔西南水银洞层控超大型卡林型金矿床成矿模式及成矿预测研究.
地质学报,2009,83(10):1473-1482
|
CSCD被引
38
次
|
|
|
|
|
6.
曹鸿水. 黔西南"大厂层"形成环境及其成矿作用的探讨.
贵州地质,1991,1(1):5-12
|
CSCD被引
10
次
|
|
|
|
|
7.
杨科佑.
滇黔桂地区微细浸染型金矿成矿条件和矿床预测研究. 科研报告,1992
|
CSCD被引
1
次
|
|
|
|
|
8.
梅厚钧. 西南暗色岩深渊分异两个系列的岩石化学特征与铁镍矿化的关系.
地球化学,1973(4):219-253
|
CSCD被引
9
次
|
|
|
|
|
9.
苏文超.
扬子地块西南缘卡林型金矿床成矿流体地球化学研究. 博士论文,2005
|
CSCD被引
1
次
|
|
|
|
|
10.
Liu S. Geochronological and geochemical constraints on the petrogenesis of alkaline ultramafic dykes from southwest Guizhou Province, SW China.
Lithos,2010,114:253-264
|
CSCD被引
39
次
|
|
|
|
|
11.
Zhu L M. A study on the relations between ultrabasic dikes and fine disseminated gold Guizhou Province as exemplified by Zimudang largesized gold deposit.
Chinese Journal of Geochemistry,1998,17(4):362-371
|
CSCD被引
1
次
|
|
|
|
|
12.
Su W C. Preliminary investigations of platinum-group elements in the Carlintype gold deposits, southwestern China.
Chinese Science Bulletin,1999,44:152-153
|
CSCD被引
1
次
|
|
|
|
|
13.
苏文超. 黔西南卡林型金矿床流体包裹体中微量元素研究.
地球化学,2001,30(6):512-516
|
CSCD被引
25
次
|
|
|
|
|
14.
Wang L G. Constraints on crustal evolution and gold metallogeny in the Northwestern Jiaodong Peninsula, China, from SHRIMP U-Pb zircon studies of granitoids.
Ore Geology Reviews,1998,13:275-291
|
CSCD被引
177
次
|
|
|
|
|
15.
Barnes S. The origin of the fractionation of platinum-group elements in terrestrial magmas.
Chemical Geology,1985,53:303-323
|
CSCD被引
143
次
|
|
|
|
|
16.
Wyman D A. Noble metal abundances of Late-Archean (2. 7 Ga) accretion-related shoshonitic lamprophyres, Superior Province, Canada.
Geochimica et Cosmochimica Acta,1995,59:47-57
|
CSCD被引
2
次
|
|
|
|
|
17.
Vogel D C. The petrogenesis and platinum-group element geochemistry of the Newer Volcanic Province, Victoria, Australia.
Chemical Geology,1997,136:181-204
|
CSCD被引
20
次
|
|
|
|
|
18.
Maier W D. Platinum-group element in silicate rocks of the lower, critical and main zones al union section, western Bushveld complex.
Journal of Petrology,1999,40:1647-1671
|
CSCD被引
10
次
|
|
|
|
|
19.
Crocket J H. PGE in fresh basalt, hydrothermal alteration products, and volcanic incrustations of Kilauea volcano, Hawaii.
Geochimica et Cosmochimica Acta,2000,64:1791-1807
|
CSCD被引
6
次
|
|
|
|
|
20.
Maier W D. The concentrations of the noble metals in Southern African flood-type basalts and MORB: Implications for petrogenesis and magmatic sulphide exploration.
Contributions to Mineralogy and Petrology,2003,146:44-61
|
CSCD被引
18
次
|
|
|
|
|
了解气象卫星更多信息，请访问