1. Geochemistry, Geochronology and Geological Implication of Intrusive Rock from Beizhan Iron Deposit of Xinjiang.
- Author
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ZHENG Yong, HUANG Wen-hai, ZHOU Yi, ZHAO Zhen-gang, GUO Xin-cheng, and CHEN Zheng-hui
- Abstract
Beizhan iron deposit in Xinjiang is one of the important deposits of Awulale iron-copper-gold metallogenic belt in the western Tianshan. K-feldspar granite and K-feldspar granite porphyry, which have pulsating intrusive contact relationship, are exposed in the southern of iron district. Geochemical characteristics show that the rocks are high potassium calc-alkaline, enriched in large iron lithophile element (Rb and K), and relatively depleted in high field strength elements, and Ba, Sr, P and Ti are significantly negative anomaly; fractionation of light and heavy rare earth elements is obvious. Ages of K-feldspar granite and K-feldspar granite porphyry from Beizhan iron deposit are respectively (320.5±1.9) Ma and (306.8±1.6) Ma by the method of LA-ICP-MS zircon U-Pb dating. Combined with regional geological data, the geochemical and geochronological results show that K-feldpar granite and K-feldspar granite porphyry exposed have the same magma source, and probably form in the tectonic setting transformed from the subduction of southern Tianshan oceans to the continental collision orogeny from Early Carboniferous to Late Carboniferous. [ABSTRACT FROM AUTHOR]
- Published
- 2014