| 新疆哈密图拉尔根全岩矿化岩浆铜-镍-钴矿床地质特征及找矿方向 |
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| 引用本文：.2007.Geological characteristics of Tulargen magmatic Cu_Ni_Co deposit in eastern Xinjiang and its exploration direction [J].Mineral Deposits,26(3):307~316 |
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| 基金项目:中国地质调查局东天山头苏泉地区铜镍金资源潜力评价项目(200110200004)、国家“十五"科技攻关新疆305项目东天山东段铜矿专题（2001BA609A_07、2003BA612A_06_07）、新疆维吾尔自治区资源补偿费项目哈密图拉尔根铜镍矿普查(2004026、2005027) |
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| 中文摘要:东天山图拉尔根铜镍矿区受控于康古儿—黄山韧性剪切带北东段的区域性韧性剪切带之次级断裂构造，断裂构造对该矿床的控制作用极为明显。矿区范围内现已发现3个镁铁质_超镁铁质杂岩体，目前只对一号岩体进行了勘探评价，已探明控制储量达大型规模。文章基于对一号杂岩体的矿床地质特点及其化探和物探特征的总结，试图建立该大型铜镍矿床的找矿评价模式。一号岩体以全岩矿化为特征，可分为4个岩相：角闪橄榄岩相、辉石橄榄岩相、角闪辉石岩相和辉长岩相，赋矿岩石主要为角闪橄榄岩、辉石橄榄岩，矿床属于与镁铁质_超镁铁质岩浆有关的岩浆熔离贯入型Cu-Ni-Co矿床,具有单期岩浆多次脉动上涌成矿的特征。岩体m/f介于3.1～4.8之间，属于铁质超镁铁岩类，且具有低钛、低碱、低Al2O3特征，含矿岩相具有高硫特征（S>1%）。化探显示图拉尔根地区位于Cu、Ni、Co组合异常区内，Ni异常峰值133×10-6，Cu异常峰值83×10-6。成矿元素Ni、Co、Cu在角闪橄榄岩、辉石岩中呈现富集趋势。物探显示岩体具有三高一低的地球物理异常特征。矿区位于区域性的重力高值异常区内，在高重力背景下，含矿岩体表现出明显的低阻、高极化及高磁异常特征。作者指出沿强变形带中间的中部弱韧性变形带追索含矿岩体，将对扩大找矿范围具有实际意义；岩体南西部可能为含矿岩浆上升就位的主要中心，这里角闪橄榄岩相也十分发育，应为矿化富集的有利地段。 |
| 中文关键词:地质学 镁铁质_超镁铁质杂岩 岩浆铜镍钴矿 岩石化学 物化探异常 找矿方向 图拉尔根 东天山 |
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| Geological characteristics of Tulargen magmatic Cu_Ni_Co deposit in eastern Xinjiang and its exploration direction |
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| Abstract:The Tulargen Cu_Ni deposit, a great breakthrough in Cu_Ni exploration in Xinjiang in the past ten years, is obviously controlled by secondary fractures in the Kangguer_Huangshan regional ductile_sheer zone, similar to things of the known Huangshan and Xiangshan Cu_Ni deposits. Ore bodies are hosted in ultramafic complexes, which consist of hornblende peridotite, pyroxene peridotite, hornblende pyroxenite and gabbro. The proved nickel (125000 tons) and cobalt reserves (10 000 tons) have reached large size and copper reserves have reached medium size. The richest massive ore body with an average grade of Ni 4.56% and Cu 2.52% can reach 37.98 m in thickness in No1503 drill hole. The ore district remains under prospecting now. The deposit was formed through deep_seated magma segregation and is characterized by bulk mineralization. It has experienced a single intrusion with multiple pulsant inburst. The m/f values are between 3.1 and 4.8, falling into the category of ferrous_ultramafic rocks. The intrusion has low Ti, total alkali and Al2O3, and contains high sulfur (usually higher than 1%), suggesting a good ore_forming potential. Ore minerals consist of pyrrhotite, pyrite, pentlandite, chalcopyrite and violarite. Ni and Co elements occur as isolated sulfides and sulfur_arsenic mineral components. Geochemical exploration reveals that the deposit is located in a Cu-Ni-Co anomaly area, with the Ni peak value of 133×10-6 and Cu value of 83×10-6. Geophysical characteristics of this district show that high gravity, high polarization and high magnetic anomalies are associated with low electric resistance. The exploration direction is also pointed out in this paper. New ore_bearing ultramafic intrusions will be possibly found along the central weak shear zone between the strong shear zones on both sides, and the southwestern extension of No. I intrusion with well_developed hornblende peridotite is the pipe center for magma upwelling and may be a mineralization enrichment center. |
| keywords:geology, mafic_ultramafic complexes, magmatic Cu_Ni_Co deposit, petrography, petrochemistry geochemical and geophysical anomaly, exploration direction, Tulargen, eastern Tianshan |
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