【作者】 毕明波；

【导师】 李永军；

【作者基本信息】 长安大学 ， 构造地质学， 2006， 硕士

【摘要】 本文基于新疆新源县托库孜库马拉克一带1∶5万区调项目，经过野外地质矿产调查和室内资料整理、数据的计算和图件绘制，对赛肯都鲁—拉斯台一带花岗岩类的岩石学、岩石化学、地球化学特征，及花岗岩形成的时代及成矿元素背景、成矿条件等进行系统研究和全面认识，取得如下主要地质成果： 1．运用岩石谱系单位填图方法和理论，按照同源岩浆演化序列的观点，对位于伊宁阿吾拉勒构造—岩浆带的赛肯都鲁—拉斯台一带花岗岩类进行了侵入序列的划分，划分出赛肯都鲁—阔尔库超动岩组合和拉斯台—塔尔塔夏岩浆带。对前人所称的赛肯都鲁岩体进行了解体，合理建立了本区的花岗岩类谱系单位。 2．赛肯都鲁序列岩体年龄为321Ma，侵入下石炭统大哈拉军山组，为准铝质钙碱性花岗岩类，属ACG(富角闪石的钙碱性花岗岩)，其物质来源为以幔源物质为主的壳幔混合源，依据主量元素、微量元素和稀土元素计算和作图，参考与之密切成因和构造配套关系的大哈拉军山组火山岩构造环境，确定其构造环境为火山弧环境，这一结论，将为重建西天山地质构造演化史提供重要信息。 3．阔尔库序列岩体年龄为281Ma，与赛肯都鲁岩体为超动接触关系，为弱过铝质钙碱性花岗岩类，属CPG(含堇青石过铝花岗岩)，物质来源为以壳源物质为主，岩体构造环境为同碰撞类型。与之密切成因和构造配套关系的伊什基里克组火山岩构造环境印证了这个结论。 4．拉斯台序列岩体年龄为328Ma，侵入下石炭统大哈拉军山组下段和阿克沙克组上部，为准铝质钙碱性花岗岩类，属KCG(富钾钙碱性花岗岩)。其物质来源为以壳源物质为主的壳幔混合源，岩体构造环境为火山弧环境，该序列大离子亲石元素和稀土元素配分曲线印证了这个结论。 5．赛肯都鲁—拉斯台一带花岗岩处于阿吾拉勒铜铜银多金属成矿带，阔尔库序列二长花岗岩中的金属元素Cu、Au等元素的较富集，赛肯都鲁序列石英闪长岩中Cu等多种金属元素较富集。已发现的矿化点均与花岗岩有关系，岩浆及其期后的热液活动为铜金等多金属的活化、转移提供了必不可少的热动力，或者通过改变地壳局部的地热梯度，为成矿提供热源在构造适宜部位(断裂或断裂带)成矿。更多还原

【Abstract】 Based on the project of the 1:50000 regional geological investigation in Tuokuzikumalake region in Xinyuan County, Xinjiang, this paper deal with -the age of the granite and its mineralizing element background etc as well as the systematic research and general understand of the petrological, petrochemical and geochemical character, by the field survey of the mineral resources, data processing and calculating and mapping. The main geological achievements are concluded as follow.1. Using the petrological spectral series unit mapping method and the theory of cognate magma evolvement, we classify the intrusion series of the granite in Saekendulu-Lasitai area in Awulale tectonic-magmatic belt into the Saikendulu-kuoerku the beveling contact relationship rock assemblage and Lasitai-Taertaxia magma belt. We also disassemble the rock body which called Saikendulu body by the predecessor, and construct the petrological spectral series unit.2. The Saikendulu series, aged 321 Ma, intrude the Dahalajun Mountain formation, which belong to ACG, derive from a crust-mantle mixed source dominated by the mantle material. According to the calculation and mapping of the main elements, trace elements and thulium elements, we can conclude that it is tectonicly derived from the volcanic arc condition by referring to the Dahalajun mountain volcanic structural setting which closely related to the Saikendulu series in genetic and tectonic aspect. This conclusion can provide important information in reconstruction of the geologic-tectonic evolvement of the West Tianshan Mountain.3. The Kuoerku series, aged 281Ma, the beveling contact relationship with The Saikendulu series, which is Moderately Peraluminous Calc-alkline Granitoids, belonging to CPG, mainly derived from crust sources. The tectonic setting of the rock body is Syn-COLG And the tectonic setting of the Yishijili volcanic formation which is closely relative to the Kuoerku series has testified this conclusion.4. Lasitai series, aged 328Ma, intrude the lower of the Lower Carboniferous of the lower更多还原