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位于新疆东准噶尔的贝勒库都克锡矿带是我国北方地区首次发现具独立锡矿床的锡成矿带。该成矿带自东向西发育萨惹什克、贝勒库都克、干粱子、卡姆斯特4个独立锡矿床。它们在主要矿石类型、脉石矿物组成上表现为两类。萨惹什克锡矿属于石英型,占优势的脉石矿物是石英,其次有长石,而白云母很不发育。其它3个锡矿则以云英岩型为特征,主要脉石矿物是石英和长石,次要矿物有白云母。本文报道了我们对发育白云母的卡姆斯特、干梁子、贝勒库都克锡矿床开展矿石~(10)Ar-~(39)Ar同位素定年的结果。3件与锡石平衡共生的白云母有很平坦的年龄谱,其~(40)Ar/~(36)Ar-~(39)Ar/~(36)Ar正等时线年龄与各自的坪年龄很一致,年龄值范围是305～315Ma。这些结果和我们已报道的萨惹什克锡矿的Re-Os等时线年龄一起,确定了全部4个锡矿床的成矿年龄,并证实它们构成一个锡成矿带。此外,锡矿石与花岗岩围岩年龄的一致性表明了研究区锡成矿与花岗岩浆作用间很可能存在成因关系。
The Belleukurkuxi tin belt located in East Junggar, Xinjiang is the first tin metallogenic belt discovered in northern China with an independent tin deposit. The ore belt developed from east to west Sarajekin, Baylor Kutcher, dry sorghum, Calm four independent tin deposits. They are mainly two types in the main ore types and gangue minerals. The Sayashikh tin mine belongs to the quartz type. The predominant gangue minerals are quartz, followed by feldspar, while the muscovite is poorly developed. The other three tin deposits are characterized by a dolomitic rock type, with the main gangue minerals being quartz and feldspar and the minor minerals being muscovite. This paper reports the results of ~ (10) Ar- ~ (39) Ar isotopic dating of muscovite, Qianliangzi and Belleukurkix tin deposits in the development of muscovite. The three muscovite symbiosis with cassiterite have a very flat age spectrum, and the isochronal ages of ~ (40) Ar / ~ (36) Ar- ~ (39) Ar / ~ (36) Ar and their The age is very consistent, the age range is 305 ~ 315Ma. Together with the reported Re-Os isochron age of the Sayashikh mine, we have identified the age of all four tin deposits and confirmed their formation as a tin mineralization. In addition, the consistency of the age of tin ore and granite indicates that there is a possible relationship between tin mineralization and granite magmatism in the study area.