CAJ | 학술논문

浙西闲林铁钼矿床地质特征表明，矿床为岩浆期后热液接触交代矽卡岩型，根据岩石蚀变、矿石结构构造和矿物组合，划分了4个成矿阶段。研究表明：闲林矽卡岩型铁钼矿与中生代侵入岩成岩期岩浆热液作用关系密切。运用SHRIMP 锆石 U-Pb 定年方法对闲林花岗闪长岩体的成岩时代进行测定，为（151.8±2.2）Ma，认为与磁铁矿成矿密切相关；结合辉钼矿 Re-Os 同位素年龄（132.05±0.47）Ma，与早白垩世花岗岩成岩时代相耦合，进一步限定了闲林地区成岩→成矿活动的时间轨迹，铁钼矿床是晚侏罗世和早白垩世两期成矿形成的。
절서한림철목광상지질특정표명，광상위암장기후열액접촉교대석잡암형，근거암석식변、광석결구구조화광물조합，화분료4개성광계단。연구표명：한림석잡암형철목광여중생대침입암성암기암장열액작용관계밀절。운용SHRIMP 고석 U-Pb 정년방법대한림화강섬장암체적성암시대진행측정，위（151.8±2.2）Ma，인위여자철광성광밀절상관；결합휘목광 Re-Os 동위소년령（132.05±0.47）Ma，여조백성세화강암성암시대상우합，진일보한정료한임지구성암→성광활동적시간궤적，철목광상시만주라세화조백성세량기성광형성적。
Geological characteristics show that the Xianlin iron-molybdenum ore deposit belongs to the skarn type and it is formed from the contact replacement of the postmagmatic hydrothermal solutions.There are closely relationships between the formation of the deposit and granodiorite magmatic hydrotherm.According to the al-tered rocks,ore structure and mineral assemblage,the deposit formation is divided into 4 mineralization stages. The zircon SHRIMP U-Pb dating results indicate that the Xianlin granodiorite were emplaced at (151.8 ±2.2) Ma,and the Re-Os isotopic age of molybdenite shows that the mineralization took place at (132.05 ±0.47) Ma.The two ages prove that mineralization events occurred in Late Jurassic and Early Cretaceous,and con-straint the time of the rock-formation → mineralization,which represents the time domain of mineralization process of skarn iron-molybdenum ore-forming system in the Xianlin of Western Zhejiang.