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中文摘要：
云南个旧锡铜多金属矿床是世界级超大型矿床,个旧矿集区内与蚀变玄武岩有关的（似）层状铜矿床是其重要的矿床类型。该类型矿床的围岩玄武岩均发生蚀变,且蚀变强度与矿化关系密切。本文对个旧卡房矿化玄武岩中的金云母进行^40Ar-^39Ar同位素定年分析,得到其坪年龄为（85.49±0.63）Ma,等时线年龄为（85.62±0.42）Ma,反等时线年龄为（85.59±0.81）Ma,三者基本一致,代表了变玄武岩的蚀变年龄及同期矿化年龄,属于晚白垩世,可与个旧锡铜多金属矿床的成矿时代进行对比。
英文摘要：
The Gejiu polymetallic tin ore district in Yunnan Province is the largest tin deposit in the world,and the Kafang copper（tin） deposit is a component part of this ore district.The stratoid ore body of the Kafang copper（tin） deposit,closely related to meta-basalt,is characterized by enriched copper.The basalt has been altered and the alteration intensity is related to the copper mineralization.This paper presents a new 40Ar-39Ar phlogopite age for the meta-basalt in the Kafang tin-copper deposit in order to constrain the timing and duration of the alteration of basalt and the mineralization.Phlogopite yielded 40Ar-39Ar plateau age of 85.49±0.63 Ma,isochronal age of 85.62±0.42 Ma,and inverse isochronal age of 85.59±0.81 Ma.These ages are substantially consistent with each other,pointing to late Cretaceous.These results are coincident with the data obtained from the Gejiu polymetallic tin-copper deposit.
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