[1]范飞鹏,肖惠良,陈乐柱,等.南岭东段含稀土矿花岗岩体中暗色包体地质特征—以陂头岩体为例[J].华东地质,2016,37(01):36.[doi:10.16788/j.hddz.32-1865/P.2016.01.005]
 FAN Fei-peng,XIAO Hui-liang,CHEN Le-zhu,et al.Geological features of dark enclaves in REE-bearing granites in eastern Nanling: an example from the Pitou rock mass[J].East China Geology,2016,37(01):36.[doi:10.16788/j.hddz.32-1865/P.2016.01.005]
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南岭东段含稀土矿花岗岩体中暗色包体地质特征—以陂头岩体为例()
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《华东地质》[ISSN:2096-1871/CN:32-1865/P]

卷:
37
期数:
2016年01期
页码:
36
栏目:
基础地质
出版日期:
2016-03-15

文章信息/Info

Title:
Geological features of dark enclaves in REE-bearing granites in eastern Nanling: an example from the Pitou rock mass
文章编号:
2096-1871(2016)01-036-09
作者:
范飞鹏1肖惠良1陈乐柱1鲍晓明1蔡逸涛1周 延1李海立2
(1.南京地质矿产研究所,南京 210012)(2.中国地质科学院,北京 100037)
Author(s):
FAN Fei-peng1XIAO Hui-liang1CHEN Le-zhu1BAO Xiao-ming1CAI Yi-tao1ZHOU Yan1 LI Hai-li2
(1.Nanjing institute of Geology and Mineral Resource,Nanjing 210016,China)(2 Institute of Geology Chinese Academy of Geological Sciences, Beijing 100037,China)
关键词:
风化壳淋积型稀土矿暗色包体南岭东段燕山早期
Keywords:
weathering crust infiltration deposit rare earth deposit dark enclaves eastern Nanling Early Yanshanian
分类号:
P588.12+4
DOI:
10.16788/j.hddz.32-1865/P.2016.01.005
文献标志码:
A
摘要:
在野外地质调查和室内综合研究的基础上,通过研究南岭东段风化壳淋积型矿中含稀土矿花岗岩层中暗色包体的地质特征,发现分布在岩体中的大量暗色包体具流面和流线构造,主要组成矿物为石英、辉石和斜长石,具典型的辉长结构。暗色包体低硅、钾和钠,高钙、铝、镁、铁、钛和锰,属亚碱性—铝不饱和型;富集U、La、Pr、Nd、Sm、Dy,亏损Nb、Sr、Zr、Hf、Ti等微量元素;REE总量低于寄主含矿花岗岩层稀土总量,Ce和Eu具有明显的负异常。这些特征说明暗色包体的原岩可能来自早期基性岩,其形成与燕山早期陂头岩体的分异演化关系密切。与南岭地区花岗岩中此类暗色包体进行对比,有助于在该区寻找稀土矿床和稀有金属矿床。
Abstract:
On the basis of field geological survey and indoor integrated study, this study analyzed the geological features of dark enclaves from the REE-bearing granites in weathering crust infiltration deposits in eastern Nanling. A large amount of dark enclaves in the rock mass is found to occur in platy and linear structures, and consists of quartz, pyroxene and plagioclase with typical gabbro texture. The dark enclaves are low in Si, K and Na, and high in Ca, Al, Mg, Fe, Ti and Mn, belonging to sub-alkaline-aluminum unsaturated type; enriched in U, U, La, Pr, Nd, Sm, Dy and depleted in Nb, Sr, Zr, Hf, Ti. The total REE content of dark enclaves is lower than that of host bearing granite, with obvious negative Ce and Eu anomalies. All these characteristics suggest that the protolith may originate from the early mafic rocks related to differentiation and evolution of Pitou rock mass in early Yanshanian. Comparison with dark enclaves of granites in the Nanling area will help search for rare earth deposits and rare metal deposits.

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备注/Memo

备注/Memo:
基金项目:中国地质调查局地质调查项目(项目编号:1212011120813、 1212011120811、 1212010881305、1212010533003)资助。第一作者简介:范飞鹏,1982年生,高级工程师,主要从事矿产资源勘查和矿床学研究工作。
更新日期/Last Update: 2016-03-31