摘要
哈密葫芦铜镍矿是东天山地区典型的与基性-超基性岩有关的岩浆成因块状硫化物矿床.对其中含铜镍硫化物的基性-超基性岩用Re-Os等时线法定年,获得(283±13) Ma的等时线年龄.这表明,葫芦与东天山其他铜镍矿床乃至喀拉通克和箐布拉克铜镍硫化物矿床一样,主要形成于海西期,同位素年代学界定的成岩成矿时间大致在320～280 Ma,表明海西晚期在新疆北部为一个与基性-超基性岩有关的铜镍矿床成矿高峰期.
The Hulu Cu-Ni sulfide deposit is a typical magmatic Cu-Ni deposit related to mafic-ultramafic magmatism. Geochmical dating on the ore-bearing mafic-ultramafic rocks gives an Re-Os isochron age of 283 ± 13 Ma, suggesting that the Hulu Cu-Ni sulfide deposit formed at the end of the Hercynian, similar to the Cu-Ni deposits in Eastern Tianshan area and at Kalatongke and Qinbulake. All of the age data of Cu-Ni deposits in the Eastern Tianshan, Altay, and Qinbulake show an ore-forming age from 320 Ma to 280 Ma, indicating that the end of the Hercynian is the peak of Cu-Ni deposits formation from mantle-source mafic-ultramafic magmatism.
出处
《新疆地质》
CAS
CSCD
2005年第3期230-233,共4页
Xinjiang Geology
基金
国家科技攻关计划课题(2003BA612A-01)
中国地质调查局国土资源大调查项目(200420190004)共同资助
关键词
铜镍硫化物矿床
基性-超基性岩
成矿时代
葫芦
东天山地区
Cu-Ni sulfide deposit
mafic-ultramafic rocks
ore-forming age
Hulu, Eastern Tianshan Region
Hercynian
