Ore mineral characteristics and zircon U-Pb geochronology of Yuanjiacun iron deposit in Shanxi
作者：TONG Yuepeng,PENG Xiaolei,LIU Guoqing,YUE Liping,MA Dongmei
摘要：In order to further understand the ore characteristics and metallogenic age of Yuanjiacun iron deposit in Shanxi, the mineral composition characteristics of iron ore were studied on the basis of field investigation and microscopic observation. Magnetite, hematite, goethite and pyrite of different stages were identified according to their texture and structure features. Two sets of 207Pb/206Pb ages have been obtained by ICPMS isotope dating of magnetite quartzite, of which the zircon age with metamorphic origin is 1 916±88 Ma, representing the main metamorphic age of iron deposit. Another group of magmatic zircons with rhythmic zones are of 2 280±30 Ma age, representing the diagenetic age of iron formation. In addition, scattered age records after metamorphism indicate frequent hydrothermal events after mineralization. Based on the mineral fabric characteristics and the age data of zircons of different origins, it is known that the deposit has undergone sedimentary mineralization period, metamorphic mineralization period, hydrothermal mineralization period and weathering mineralization period.
發文機構：College of Earth Sciences
關鍵詞：YuanjiacunmineralCHARACTERISTICSZIRCONU-PBGEOCHRONOLOGYBIF
分類號： P618.31[天文地球—礦床學][天文地球—地質學]P597.3
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