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它温查汉西铁多金属矿床是东昆仑祁漫塔格成矿带新发现的又一典型矽卡岩型矿床。利用LA-ICP-MS锆石U-Pb定年方法,获得矿区主要成矿岩体花岗闪长斑岩的成岩年龄为236.0±2.3Ma,该结果与前人利用~(40)Ar-~(39)Ar法获得的矽卡岩型磁铁矿矿石中白云母229.9±3.5Ma的等时线年龄一致。花岗闪长斑岩为过铝质高钾钙碱性系列,成因类型属于Ⅰ型;微量元素配分型式表现为轻稀土元素和高场强元素富集、重稀土元素和大离子亲石元素亏损、中等负Eu异常的特征。花岗闪长斑岩形成于晚古生代—早中生代构造-岩浆旋回的碰撞-后碰撞阶段,与区域上大规模的幔源岩浆底侵及其与壳源岩浆的混合作用有关。
The Wensha Hanxi iron polymetallic deposit is another typical skarn type deposit newly discovered in the Qimantag metallogenic belt of East Kunlun. Using the LA-ICP-MS zircon U-Pb zircon dating, the diagenetic age of the granodiorite porphyry of the main metallogenic intrusive rock mass is 236.0 ± 2.3Ma. This result is in agreement with the previous studies using ~ (40) Ar- ~ 39) Argon obtained skarn type magnetite ore Muscovite 229.9 ± 3.5Ma isochron age of the same age. The granodiorite porphyry is a series of high-K calc-alkaline petrogenic series, and the genetic type belongs to type I. The distribution patterns of trace elements are characterized by light rare earth elements and high-field-strength elements enrichment, heavy rare earth elements and large ion lithophile elements loss , Moderate negative Eu anomaly characteristics. The granodiorite porphyry formed during the Late Paleozoic-Early Mesozoic tectonic-magmatic cycle in the collision-post-collision stage and related to the large-scale mantle-derived magmatism and its mixing with the crustal magma in the area.