东秦岭单金属含氟斑岩型钼矿与Climax型钼矿对比

Comparison between the monometallic high fluorine porphyry Mo deposits in east Qinling Mo belt and the Climax-type Mo deposits

自西向东分布的金堆城、雷门沟、鱼池岭及东沟钼矿为东秦岭单金属斑岩钼矿的典型代表,其成矿年龄间隔大约为10Ma左右,且自西向东有成矿年龄逐渐变小趋势。这四个中、晚中生代形成的含氟钼矿床在矿化、热液蚀变及火成岩地球化学方面存在着极大的共性。通过与科罗拉多成矿带中、晚第三纪形成的Climax型斑岩钼矿床对比,发现这两类型的矿床除了成矿年龄及品位的差异外,在成矿构造、岩浆热液环境等方面存在相当大的类似性。结合其相似及不同点,我们主张东秦岭单金属含氟斑岩钼矿床属于亚Climax型钼矿床。

The four known major monometallic high-fluorine porphyry Mo deposits in the east Qinling molybdenum belt（EQMB）– Jinduicheng,Leimengou,Yuchiling,and Donggou-bear a striking similarity in mineralization,hydrothermal alteration,and igneous geochemistry.From west to east,the life span of mineralization age is about 10Ma,and it becomes younger eastward.Sharing considerable similarities in tectonic settings and magmatic and hydrothermal system,the differences between the Climax type deposits formed in mid-to late Tertiary in Colorado mineralization belt and the monometallic high-fluorine porphyry Mo deposits（MFPMD）formed in mid-to late Cretaceous in the EQMB are the mineralization age and grade.Based on the similarities and differences,we propose that the MFPMD are belonged to sub-Climax type deposits.