赣南吉埠黄沙岩体的锆石铀-铅年代学研究及其地质意义

郑国栋; 李建康; 陈振宇; 陈郑辉; 侯可军; 赵芝

赣南吉埠黄沙岩体的锆石铀-铅年代学研究及其地质意义

1.
国土资源部成矿作用与资源评价重点实验室, 中国地质科学院矿产资源研究所, 北京 100037
2.
国土资源部成矿作用与资源评价重点实验室, 中国地质科学院矿产资源研究所, 北京 100037
3.
长安大学地球科学与资源学院, 陕西西安 710054
4.
国土资源部成矿作用与资源评价重点实验室, 中国地质科学院矿产资源研究所, 北京 100037
5.
国土资源部成矿作用与资源评价重点实验室, 中国地质科学院矿产资源研究所, 北京 100037
6.
国土资源部成矿作用与资源评价重点实验室, 中国地质科学院矿产资源研究所, 北京 100037
7.
国土资源部成矿作用与资源评价重点实验室, 中国地质科学院矿产资源研究所, 北京 100037

基金项目:

国家深部探测技术与实验研究专项(SinoProbe 0301, SinoProbe0303)

中央级公益性科研院所基本科研业务费专项资金(K1001)

中国博士后科学基金和特别资助项目(2008044018,200902580)

中国地质大调查项目(1212011120989,1212010633903)

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- 收稿日期: 2011-12-19

U-Pb Dating of Zircon from Jibu Huangsha Intrusions in Southern Jiangxi Province and Its Geological Significances

1.
Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China
2.
Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China
3.
College of Earth Science and Resources, Chang'an University, Xi'an 710054, China
4.
Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China
5.
Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China
6.
Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China
7.
Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China

摘要

摘要: 赣南地区吉埠黄沙岩体的风化壳产出离子吸附型稀土矿床,但对其年代归属缺乏准确认识。利用从黄沙岩体风化壳中挑选出的锆石,开展了U-Pb法年代学研究。激光剥蚀-多接收器电感耦合等离子体质谱法(LA-MC-ICPMS)分析表明,岩体的²⁰⁶Pb/²³⁸U加权平均年龄为(242.5±1.8)Ma,说明吉埠黄沙岩体的成岩时代为印支期初期,而不是前任推断的燕山期。结合南岭区域发现的其他印支期岩体可知,印支运动在华南地区具有广泛影响,岩浆活动规模和出露面积较以往认识增大。纬度较高的黄沙岩体发生稀土矿化的事实进一步说明,1∶20万兴国幅、井冈山幅,乃至宁化幅内的印支期岩体也具有发生稀土矿化的条件,在今后的找矿工作中应给予重视。
- 吉埠黄沙岩体 /
- LA-MC-ICPMS /
- U-Pb定年 /
- 印支期 /
- 稀土矿床
Abstract: Jibu Huangsha granitic intrusions in Southern Jiangxi province hosted several ion adsorption type rare earth element (REE) deposits, but it's diagenic age is still unknown. In this paper, the U-Pb age of zircon separated from the weathering crust of Jibu Huangsha granitic intrusions was dated by using Laser Ablation-Multicollector Inductively Coupled Plasma-Mass Spectrometry (LA-MC-ICPMS). The dating results show that the weighted average ²⁰⁶Pb/²³⁸U age is (242.5±1.8) Ma, which indicates that the Jibu Huangsha intrusion formed in the early Indo-Chinese epoch, instead of the Yanshan epoch as suggested in the geological report of the Xingguo unit in a scale of 1/200000. Combining with the reports of other Indosinian granites in the Nanling district, it was concluded that Indo-China movement had a great effect in the Nanling district and produced larger scale magmatic activity with more outcrop areas than was previously understood. The higher latitude of Huagnsha intrusion further indicated the intrusions described in the geological report of Xingguo, Jinggangshan, and even the Ninghua unit in a scale of 1/200000 also have the potential to host ion adsorption type REE deposits, which should be significant for ore prospecting.
- Jibu /
- Huangsha /
- granite /
- LA-MC-ICPMS /
- U-Pb

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参考文献(24)

吴澄宇.赣南粤北地区风化壳离子吸附型稀土矿床研究[D].北京:中国地质科学院, 1988: 1-166.

白鸽,吴澄宇,丁孝石,袁忠信,黄典豪,王佩华.南岭地区离子吸附型稀土矿床形成条件和分布规律[R].北京: 地质矿产部矿床地质研究所, 1989: 1-105.

杨主明.江西龙南花岗岩稀土风化壳中粘土矿物的研究 [J].地质科学, 1987(1): 70-80.

陈德潜,吴静淑. 离子吸附型稀土矿床的成矿机制 [J].中国稀土学报, 1990(2): 175-179.

包志伟.华南花岗岩风化壳稀土元素地球化学研究 [J].地球化学, 1992(2): 166-174.

陈志澄,庄文明,陈炳辉,洪华华,俞受.华南花岗岩风化壳中稀土的存在形态及迁移富集模式 [J].中山大学学报:自然科学版, 1994(2): 106-114.

莫柱孙,叶伯丹,潘维祖,江绍年,庄锦良,高秉璋,刘金全,刘文章.南岭花岗岩地质学[M].北京:地质出版社, 1980: 1-342.

南京大学地质学系.华南不同时代花岗岩类及其与成矿关系[M].北京:科学出版社,1981: 1-408.

地矿部南岭项目花岗岩专题组.南岭花岗岩地质及其成因和成矿作用[M].北京:地质出版社, 1989: 1-471.

陈毓川,裴荣富,张宏良,林新多,白鸽,李崇佑,胡永嘉,刘垢群,洗柏琪.南岭地区与中生代花岗岩类有关的有色及稀有金属矿床地质[M].北京:地质出版社, 1989: 1-508.

江西省地质局区域地质调查大队. 1/20万区域地质调查报告书·兴国幅[Z]. 1974: 1-50.

冯志文,夏卫华,章锦统,陈紫英.江西黄沙脉钨矿床特征及成矿流体性质讨论 [J].1989,14(4): 423-432.

夏宏远,梁书艺.南岭某些钨锡(钽铌)矿床的原生分带及成因系列研究 [J].矿物岩石,1986(专辑): 1-182.

裴荣富,王永磊,王浩琳.南岭钨锡多金属矿床成矿系列与构造岩浆侵位接触构造动力成矿专属 [J].中国地质, 2009,36(3): 483-489.

Nasdala L, Hofmeister W, Norberg N, Mattinson J M, Corfu F, Dorr W, Kamo S L, Kennedy A K, Kronz A, Reiners P W, Frei D, Kosler J, Wan Y S, Gotze J, Hager T, Kroner A, Valley J W. Zircon M257—A homogeneous natural reference material for the ion microprobe U-Pb analysis of zircon [J]. Geostandards and Geoanalytical Research, 2008, 32(3): 247-265.

[JP4]Liu Y S, Hu Z C, Gao S, Günther D, Xu J, Gao C, Chen H. In situ analysis of major and trace elements of anhydrous minerals by LA-ICP-MS without applying an internal standard [J]. Chemical Geology,2008, 257: 34-43.

侯可军,李延河,田有荣.LA-MC-ICPMS锆石微区原位U-Pb定年技术 [J].矿床地质,2009,28(4): 481-492.

Hoskin P W O, Kinny P D, Wyborn D, Chappell B W. Identifying accessory mineral saturation during differen-tiation in granitoid magmas: An integrated approach [J]. Journal of Petrology, 2000, 41: 1365-1396.

张家菁,赵正,陈振宇,陈郑辉,侯可军.赣南—粤北油山—猫头寨岩体的成岩时代及其地质意义 [J].岩矿测试, 2012,31(3): 554-558.

王永磊,陈振宇,陈郑辉,侯可军,赵正,徐建祥,张家菁,曾载淋.赣南—湘东湖南洞岩体U-Pb法年代学研究及其对加里东构造背景的意义[J].岩矿测试, 2012, 31(3): 525-529.

熊清华.大富足主花岗岩体定位机制初探[J].江西地质科技, 1990, 17(3): 1-6.

王登红,陈郑辉,陈毓川,唐菊兴,李建康,应立娟,王成辉,刘善宝,李立兴,秦燕,李华芹,屈文俊,王彦斌, 陈文,张彦.我国重要矿产地成岩成矿年代学研究新数据[J].地质学报, 2010, 84(7): 1030-1040.

王登红,陈毓川,陈郑辉,刘善宝,许建祥,张家菁,曾载淋,陈富文,李华芹,郭春丽.南岭地区矿产资源形势分析和找矿方向研究[J].地质学报, 2007, 81(7): 882-890.

王登红,陈富文,张永忠,雷泽恒,梁婷,韦龙明,陈郑辉,刘善宝,王成辉,李华芹,许以明,曾载淋,许建祥, 傅旭杰,范森葵,陈祥云,贾宝华,姚根华.南岭地区有色-贵金属成矿潜力及综合探测技术示范研究[M].北京:地质出版社, 2011: 1-472.

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赣南吉埠黄沙岩体的锆石铀-铅年代学研究及其地质意义

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U-Pb Dating of Zircon from Jibu Huangsha Intrusions in Southern Jiangxi Province and Its Geological Significances

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