| 西天山CuNi-VTiFe复合型矿化镁铁-超镁铁杂岩 ——哈拉达拉岩体成岩成矿背景特殊性讨论 |
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| 引用本文： | 龙灵利,王玉往,唐萍芝,王莉娟,王京彬,廖震.西天山CuNi-VTiFe复合型矿化镁铁-超镁铁杂岩 ——哈拉达拉岩体成岩成矿背景特殊性讨论[J].岩石学报,2012,28(7):2015-2028. |
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| 作者姓名： | 龙灵利 王玉往 唐萍芝 王莉娟 王京彬 廖震 |
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| 作者单位： | 北京矿产地质研究院,北京100012;中色地科矿产勘查股份有限公司,北京100012 |
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| 基金项目： | 本文受国家重点基础研究发展规划项目(2007CB411304、2001CB409806)和国家自然科学基金重点项目(4103042)联合资助. |
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| 摘 要： | 西天山哈拉达拉镁铁-超镁铁杂岩为一CuNi-VTiFe复合型矿化岩体,主要由橄长岩、橄榄辉长岩、角闪辉长岩、辉长岩和辉绿岩组成。获得岩体中橄榄辉长岩SHRIMP锆石U-Pb年龄为308.8±1.9Ma,辉长岩SHRIMP锆石U-Pb年龄307.3±8.2Ma。岩石具堆晶结构、辉长-辉绿结构,岩体韵律层发育;各类岩石稀土和微量元素配分曲线模式相似,多具Eu,Sr正异常,它们可能为同一岩浆结晶分异演化的产物;Sr-Nd同位素特征(87Sr/86Sr初始比值=0.703913～0.705259,εNd(t)=4.00～8.42)表明原始岩浆来自于亏损地幔源区。推测哈拉达拉岩体形成于后碰撞造山早期伸展环境、叠加近同期地幔柱活动的特殊地质背景中。
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| 关 键 词： | CuNi-VTiFe复合型矿化 锆石U-Pb年龄 Sr-Nd同位素 哈拉达拉 西天山 新疆 |
| 收稿时间： | 2011/12/11 0:00:00 |
| 修稿时间： | 2012/3/22 0:00:00 |
A debate on the special circumstance of rock-forming and ore-forming of Haladala pluton, a mafic-ultramafic complex related to CuNi-VTiFe composite mineralization, in western Tianshan |
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| Long Lingli,Wang YuWang,Tang PingZhi,Wang LiJuan,Wang JingBin and Liao Zhen.A debate on the special circumstance of rock-forming and ore-forming of Haladala pluton, a mafic-ultramafic complex related to CuNi-VTiFe composite mineralization, in western Tianshan[J].Acta Petrologica Sinica,2012,28(7):2015-2028. |
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| Authors: | Long Lingli Wang YuWang Tang PingZhi Wang LiJuan Wang JingBin and Liao Zhen |
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| Institution: | Beijing Institute of Geology for Mineral Resources, Beijing 100012, China;Sinotech Mineral Exploration Co., Ltd, Beijing 100012, China;Beijing Institute of Geology for Mineral Resources, Beijing 100012, China;Sinotech Mineral Exploration Co., Ltd, Beijing 100012, China;Beijing Institute of Geology for Mineral Resources, Beijing 100012, China;Sinotech Mineral Exploration Co., Ltd, Beijing 100012, China;Beijing Institute of Geology for Mineral Resources, Beijing 100012, China;Sinotech Mineral Exploration Co., Ltd, Beijing 100012, China;Beijing Institute of Geology for Mineral Resources, Beijing 100012, China;Sinotech Mineral Exploration Co., Ltd, Beijing 100012, China;Beijing Institute of Geology for Mineral Resources, Beijing 100012, China;Sinotech Mineral Exploration Co., Ltd, Beijing 100012, China |
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| Abstract: | Haladala pluton,a mafic-ultramafic complex related to CuNi-VTiFe composite mineralization in western Tianshan,consists of troctolite,olivine gabbro,hornblende gabbro and diabase.The SHRIMP zircon U-Pb age of 308.8±1.9Ma,307.3±8.2Ma for olivine gabbro and gabbro of the Pluton were obtained.The major rock types in the Haladala pluton show cumulate texture,gabbro-ophitic textures,and the pluton exhibits well-developed rhythmic layering.All the different types rock of the plutons have rather similar trace-element distribution and REE patterns with positive Eu,Sr abnormity mostly,and it suggests they were the results of crystallization differentiation of the similar or same magma.The geochemical characteristics of Sr-Nd isotope compsition,initial 87Sr/86Sr values=0.703913～0.705259,εNd(t)=4.00～8.42,show that the original magma came from depleted mantle source.The study proposes that the Haladala pluton was formed in an early post-collisional orogenic stage,overlaying the possible mantle plume in the same time. |
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| Keywords: | CuNi-VTiFe composite mineralization Zircon U-Pb age Sr-Nd isotope Haladala Western Tianshan Xinjiang |
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