滇东南燕山晚期老君山花岗岩的地球化学特征与年龄谱系
Geochemistry and age spectrum of Late Yanshanian granites from Laojunshan Area, Southeastern Yunnan Province, China
查看参考文献38篇
|
文摘
|
对滇东南燕山晚期老君山花岗岩开展了全岩主-微量元素、Sr-Nd-Pb同位素、锆石LA-MC-ICPMS U-Pb定年研究。结果表明该岩体岩石化学成分总体上属于高K钙碱性系列,其铝饱和指数ACNK多大于1.1;标准矿物计算显示大多数样品含有标准刚玉分子(1%~5%);认为老君山花岗岩为过铝-强过铝S型花岗岩,是古老地壳物质部分熔融的产物,其源岩可能为滇东南地区中-古元古代结晶基底中的一套变质泥岩为主,含少量变质硬砂岩的泥砂质副变质岩。根据锆石U-Pb定年结果,可将该复式岩体形成年龄分为80~88 Ma、90~98 Ma、100~118 Ma等三幕。老君山花岗岩成岩与锡矿化时代的一致性,表明都龙锡矿化与燕山期岩浆热液活动关系密切,老君山花岗岩是都龙锡锌多金属矿床成矿物质的主要源区。滇东南个旧、白牛厂和都龙等三个超大型矿床的成矿和成岩时代的耦合关系可能暗示其经历了相似的动力学背景,均与燕山期岩浆事件和华南岩石圈伸展密切相关。 |
|
其他语种文摘
|
In this paper, Laojunshan granites were collected systematically. Zircon U-Pb dating, whole rock major and trace elements, and Sr-Nd-Pb isotope analysis were carried out to understand their petrogenesis and the relationship between respective mineralizations. Results show that Laojunshan granite belongs to high-K calc-alkaline series. The ACNK is higher than 1, and most of them higher than 1.1. CIPW results show that most of the samples contain standard corundum molecules (1%-5%), indicating that Laojunshan granite are peraluminous S-type granites. Whole rock major-trace elements and Sr-Nd-Pb isotopic characteristics indicate that Laojunshan granite is highly fractionated S-type granites. Geochemical and isotopic data suggest that these highly fractionated S-type granites originated from partial melting of the protolith, which has analogous components in mixture of metamorphosed pelitic and psammitic rocks from the Meso-Paleoproterozoic continental crust. LA-MC-ICPMS U-Pb dating results show that Laojunshan granite can be divided into three episodes, i.e. 80-88 Ma, 90-98 Ma, and 100-118 Ma. Laojunshan granite is consistent with the age of tin mineralization. The consistency implies that Dulong tin mineralization has close relation with granitic magmatic hydrothermal. Laojunshan granite may be likely an important source of minerals reservoir for Dulong tin zinc polymetallic deposits.The coupling between mineralization and emplacement in Gejiu, Bainiuchang, and Dulong, Southeast Yunnan Province imply that thoses deposits formed in similar dynamic background, and are closely related to the same magmatic events and lithospheric extension of South China. |
|
来源
|
矿物学报
,2016,36(4):441-454 【核心库】
|
|
DOI
|
10.16461/j.cnki.1000-4734.2016.04.001
|
|
关键词
|
花岗岩
;
地球化学
;
锆石U-Pb年代学
;
都龙锡锌多金属矿床
;
滇东南
;
老君山
|
|
地址
|
1.
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, 550081
2.
华联矿产勘探有限责任公司, 云南, 曲靖, 655000
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
1000-4734 |
|
学科
|
地质学 |
|
基金
|
云南华联锌铟股份有限公司委托项目
;
中国科学院贵阳地球化学研究所矿床地球化学中国科学院重点实验室基金
|
|
文献收藏号
|
CSCD:5887861
|
参考文献 共
38
共2页
|
|
1.
涂光炽. 我国西南地区两个别具一格的成矿带（域）.
矿物岩石地球化学通报,2002,22:1-2
|
被引
38
次
|
|
|
|
|
2.
刘玉平. 都龙超大型锡锌铟多金属矿床矿石组构学与年代学.
矿床地质,2010,29(s1):480-489
|
被引
1
次
|
|
|
|
|
3.
张斌辉. 云南马关老君山花岗岩的年代学、地球化学特征及地质意义.
地质学报,2012,86(4):587-601
|
被引
32
次
|
|
|
|
|
4.
王小娟. 都龙锡锌多金属矿床LA-MC-ICPMS 锡石U-Pb测年及其意义.
岩石学报,2014,30(3):867-886
|
被引
53
次
|
|
|
|
|
5.
官容生. 滇东南构造岩浆带花岗岩体的含矿性探讨.
矿物岩石,1991,11(1):92-101
|
被引
16
次
|
|
|
|
|
6.
安保华. 老君山岩体特征、成岩及找矿意义探讨.
西南矿产地质,1990,4(1):30-35
|
被引
16
次
|
|
|
|
|
7.
云南省地矿局.
云南省区域地质志,1990
|
被引
16
次
|
|
|
|
|
8.
云南省地质矿产局区域地质调查院.
1:5万(都龙幅)区域地质矿产调查报告,1999
|
被引
1
次
|
|
|
|
|
9.
Hu Z C. Contrasting matrix induced elemental fractionation in NIST SRM and rock glasses during laser ablation ICP-MSanalysis at high spatial resolution.
Journal of Analytical Atomic Spectrometry,2011,26(2):425-430
|
被引
65
次
|
|
|
|
|
10.
Liu Y S. Reappraisement and refinement of zircon U-Pb isotope and trace element analyses by LA-ICP-MS.
Chinese ScienceBulletin,2010,55(15):1535-1546
|
被引
936
次
|
|
|
|
|
11.
Liu Y S. Continental and oceanic crust recycling-induced melt-peridotite interactions in the Trans-North China Orogen: U-Pb dating, Hf isotopes and trace elements in zircons from mantle xenoliths.
Journal of Petrology,2010,51(1/2):537-571
|
被引
1609
次
|
|
|
|
|
12.
吴福元. 花岗岩成因研究的若干问题.
岩石学报,2007,23(6):1217-1238
|
被引
803
次
|
|
|
|
|
13.
Chappell B W. I- and S-type granites in the Lachlan Fold Belt.
Trans. R. Soc. Edinburgh Earth Sci,1992,83:1-26
|
被引
508
次
|
|
|
|
|
14.
Chappell B W. Aluminium saturation in I- and S-type granites and the characterization of fractionated haplogranites.
Lithos,1999,46:535-551
|
被引
565
次
|
|
|
|
|
15.
Sylvester P J. Post-collisional strongly peraluminous granites.
Lithos,1998,45:29-44
|
被引
792
次
|
|
|
|
|
16.
Patino Douce A E. Phase equilibria and melting productivity in the politic system: Implication for the origin of peraluminous granites and aluminous granites.
Contri Mineral Petro,1991,107:202-218
|
被引
166
次
|
|
|
|
|
17.
Jung S. Source composition and melting temperatures of orogenic granitoids: constraints from CaO/Na2O, Al_2O_3/TiO_2 and accessory mineral saturation thermometry.
European Journal of Mineralogy,2007,19:859-870
|
被引
79
次
|
|
|
|
|
18.
Jahn B M. Massive granitoid generation in Central Asia: Nd isotope evidence and implication for continental growth in the Phanerozoic.
Episodes,2000,23(2):82-92
|
被引
317
次
|
|
|
|
|
19.
Jahn B.
Granitoids of the Central Asian Orogenic Belt and continental growth in the Phanerozoic. Geological Society of America Special Papers. 350,2000:181-193
|
被引
1
次
|
|
|
|
|
20.
Wu F Y. A-type granites in northeastern China: age and geochemical constraints on their petrogenesis.
Chem. Geol,2002,187:143-173
|
被引
582
次
|
|
|
|
|
了解气象卫星更多信息，请访问