新疆地质
新疆地質
신강지질
XINJIANG GEOLOGY
2015年
1期
1-6
,共6页
邢令%杨维忠%藏梅%林泽华%陈威
邢令%楊維忠%藏梅%林澤華%陳威
형령%양유충%장매%림택화%진위
新疆%西天山%卡特巴阿苏%二长花岗岩%SHRIMP U-Pb年龄
新疆%西天山%卡特巴阿囌%二長花崗巖%SHRIMP U-Pb年齡
신강%서천산%잡특파아소%이장화강암%SHRIMP U-Pb년령
Xinjiang%Western Tianshan Mountains%Kateba’asu%Monzonitic granite%SHRIMP U-Pb dating
新疆卡特巴阿苏金铜矿床是在那拉提中天山构造带内发现的首个特大型金铜矿床,矿床赋存于二长花岗岩体的脆性断裂破碎带内。通过对二长花岗岩的锆石进行SHRIMP U-Pb测年,获得25粒锆石加权平均值为(359.3±5.3)Ma,表明该岩体侵位时间为晚泥盆世末期,同时限定了卡特巴阿苏金矿金铜矿床的形成年龄上限为(359.3±5.3)Ma。
新疆卡特巴阿囌金銅礦床是在那拉提中天山構造帶內髮現的首箇特大型金銅礦床,礦床賦存于二長花崗巖體的脆性斷裂破碎帶內。通過對二長花崗巖的鋯石進行SHRIMP U-Pb測年,穫得25粒鋯石加權平均值為(359.3±5.3)Ma,錶明該巖體侵位時間為晚泥盆世末期,同時限定瞭卡特巴阿囌金礦金銅礦床的形成年齡上限為(359.3±5.3)Ma。
신강잡특파아소금동광상시재나랍제중천산구조대내발현적수개특대형금동광상,광상부존우이장화강암체적취성단렬파쇄대내。통과대이장화강암적고석진행SHRIMP U-Pb측년,획득25립고석가권평균치위(359.3±5.3)Ma,표명해암체침위시간위만니분세말기,동시한정료잡특파아소금광금동광상적형성년령상한위(359.3±5.3)Ma。
The Au-Cu deposit of Kateba’asu Located in the nalati tectonic belt of Western Tianshan Mountains was the first discovered superlarge Au deposit in nalati tectonic belt.The ore-controlling strata is brittle fracture zone in monzonit-ic granite,zircon SHRIMP U-Pb dating of monzonitic granite intrusion yield apparent 206Pb/238U age of(359.3 ± 5.3)Ma. Meanwhile,the age limits the deposit formed in the end of late Devonian.