摘要
本文采用40 Ar 3 9Ar真空击碎技术和阶段加热技术 ,测定了采自落雪矿的”东川式”层状铜矿之两个石英样品的年龄 ,获得了 810～ 770Ma的40 Ar 3 9Ar等时线年龄 ,这些年龄与我们从前获得的脉状铜矿石英的年龄范围一致 ,再次表明晋宁 澄江期是东川铜矿的主要成矿期。
Tow quartz samples from the Dongchuan-type layered copper deposit in the Luoxue Mine were determined by 40Ar- 39Ar crushing and heating techniques.The ages of 810～770 Ma,gained from the 40Ar- 39Ar isochrons of 98-4aQ by stepped heating and of 98-4fQ by crushing and stepped heating,which are in well agreement with the 40Ar- 39Ar isochron ages of the quartz samples DC-50-3Q and DC-51-1Q by crushing and siliceous breccia DC-5-2 by heating selected from the quartz-vein ores are interpreted as the copper mineralization ages.These ore-forming ages further indicate that the major mineralizations in the Dongchuan Copper Deposits took place in the Jinning-Chengjiang period.
出处
《矿物岩石地球化学通报》
CAS
CSCD
2001年第4期358-359,共2页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
国家自然科学基金项目 ( 4 9972 0 33)
国家 973项目 (G19990 432 0 1)
国家攀登预选项目 ( 95 YU 2 5 )
中国科学院大型仪器功能开发项目 ( 980 4A 0 77) )
