德兴铜矿闪长玢岩SHRIMP锆石U-Pb定年及原位Hf同位素研究

被引：33

作者：

周清 ^{[1
,2
]}

姜耀辉 ^{[2
]}

廖世勇 ^{[1
]}

赵鹏 ^{[2
]}

靳国栋 ^{[3
]}

贾儒雅 ^{[2
]}

刘铮 ^{[2
]}

徐深谋 ^{[4
]}

机构：

[1] 中国地质调查局成都地质矿产研究所

[2] 南京大学地球科学与工程学院

[3] 中国地质调查局南京地质矿产研究所

[4] 中国石化中原油田分公司勘探开发科学研究院

来源：

地质学报 | 2012年 / 86卷 / 11期

关键词：

德兴铜矿; 闪长玢岩; 锆石U-Pb定年; Hf同位素;

D O I：

暂无

中图分类号：

P597.3 [];

学科分类号：

摘要：

江西德兴铜矿是中国东南部最大的斑岩型铜矿,前人对该矿床的含矿花岗闪长斑岩、成矿物质来源和流体演化等方面已进行了大量研究,却对该矿床内出现的脉状石英闪长玢岩缺乏较多的关注。本研究对德兴斑岩铜矿铜厂矿区的脉状石英闪长玢岩进行了SHRIMP锆石U-Pb同位素定年,获得了一个206Pb/238U谐和年龄加权平均值153.5±2.4Ma(2σ,MSWD=2.5),表明其形成于晚侏罗世(～153.5Ma),可能处于由古太平洋板块向欧亚大陆俯冲引起的弧后或弧内拉张构造环境。对其锆石原位Hf同位素和全岩Nd同位素研究显示该侵入体具有较高的εNd(t)值(～0.5)和εHf(t)值(～4.73),暗示其很可能具有壳-幔混合的物质来源。可见,德兴地区的构造活动既经历了早期(170～171Ma)的由古太平洋板块俯冲形成的陆缘弧环境,又经历了后期(～153.5Ma)的弧后伸展环境,分别形成了与成矿相关的花岗质岩浆和与成矿无关的闪长质侵入体。

引用

页码：1726 / 1734

页数：9

共 26 条

[1]

Origin of the Dexing Cu-bearing porphyries; SE China: elemental and Sr–Nd–Pb–Hf isotopic constraints.[J].Qing Zhou;Yao-Hui Jiang;Peng Zhao;Shi-Yong Liao;Guo-Dong Jin.International Geology Review.2012, 5

[2]

Sources and evolution of arc magmas inferred from coupled O and Hf isotope systematics of plutonic zircons from the Cretaceous Separation Point Suite (New Zealand).[J].R. Bolhar;S.D. Weaver;M.J. Whitehouse;J.M. Palin;J.D. Woodhead;J.W. Cole.Earth and Planetary Science Letters.2008, 3

[3]

Detrital zircon geochronology of Precambrian basement sequences in the Jiangnan orogen: Dating the assembly of the Yangtze and Cathaysia Blocks.[J].Xiao-Lei Wang;Jin-Cheng Zhou;W.L. Griffin;Ru-Cheng Wang;Jian-Sheng Qiu;S.Y. O’Reilly;Xisheng Xu;Xiao-Ming Liu;Gui-Lin Zhang.Precambrian Research.2007, 1

[4]

Petrogenesis of Cretaceous adakitic and shoshonitic igneous rocks in the Luzong area; Anhui Province (eastern China): Implications for geodynamics and Cu–Au mineralization.[J].Qiang Wang;Derek A. Wyman;Ji-Feng Xu;Zhen-Hua Zhao;Ping Jian;Xiao-Lin Xiong;Zhi-Wei Bao;Chao-Feng Li;Zheng-Hua Bai.LITHOS.2006, 3

[5]

Trace element and isotopic composition of GJ-red zircon standard by laser ablation.[J].S. Elhlou;E. Belousova;W.L. Griffin;N.J. Pearson;S.Y. O’Reilly.Geochimica et Cosmochimica Acta.2006, 18

[6]

Zircon U-Pb age and Hf-O isotope evidence for Paleoproterozoic metamorphic event in South China.[J].Shao-Bing Zhang;Yong-Fei Zheng;Yuan-Bao Wu;Zi-Fu Zhao;Shan Gao;Fu-Yuan Wu.Precambrian Research.2006, 3

[7]

Zircon chemistry and magma mixing; SE China: In-situ analysis of Hf isotopes; Tonglu and Pingtan igneous complexes.[J].W.L Griffin;Xiang Wang;S.E Jackson;N.J Pearson;Suzanne Y O'Reilly;Xisheng Xu;Xinmin Zhou.LITHOS.2002, 3

[8]

Origin of Late Mesozoic igneous rocks in Southeastern China: implications for lithosphere subduction and underplating of mafic magmas.[J].X.M. Zhou;W.X. Li.Tectonophysics.2000, 3

[9]

Ore-forming fluid constraints on illite crystallinity (IC) at Dexing porphyry copper deposit; Jiangxi Province.[J].Jin Zhangdong;Zhu Jinchu;Ji Junfeng;Lu Xinwei;Li Fuchun.Science in China Series D: Earth Sciences.2001, 2

[10]

Crustal evolution of southeastern China: Nd and Sr isotopic evidence.[J].Jiangfeng Chen;Bor-ming Jahn.Tectonophysics.1998, 1

← 1 2 3 →