【摘要】 海南岛已发现的钼矿床(点)在空间上或成因上多与北西向或近南北向构造以及燕山晚期侵入的花岗质岩石密切相关。利用辉钼矿Re-Os同位素方法,对海南岛罗葵洞、文且、石门山三个典型的斑岩型钼矿床进行了精确定年,分别获得了99.7±0.4 Ma、104±1.0 Ma、88.6±1.0-80.2±0.6 Ma的成矿年龄,显示海南岛钼矿具有多阶段或多次成矿作用的特点(一次发生于约100Ma,另一次发生于80~88Ma间),形成于大陆边缘岩石圈拉张减薄、软流圈地幔上涌的伸展构造体制。更多还原

【Abstract】 In space or origin, molybdenum deposits found in Hainan island is close related with N-W structure,near S-N structure and granitic rock intrusions of Late Yanshanian. Re-Os ages of molybdenite from Luokuidong,Wenqie and Shimenshan are 99.7±0.4 Ma, 103.9±1.0 Ma and 88.6±1.0 ~ 80.2±0.6 Ma respectively, indicating that molybdenum deposits of Hainan island possessed multi-stage or repeatedly metallogenesis(one time was about 100 Ma, another was about 80 ~ 88 Ma). The formation environment of molybdenum deposits were lithospheric thinning of continental margin and asthenospheric mantle upwelling.更多还原