青海五龙沟金矿矿集区Ⅰ号韧性剪切带^(40)Ar/^(39)Ar年龄及地质意义  

^(40)AR/^(39)AR DATING OF THEⅠGOLD-BEARING SHEAR ZONE ON THE GOLD-ORE COLLECTED BELT OF THE WULONGGOU,QINGHAI,AND ITS SIGNIFICANCE

作　　者：寇林林[1] 罗明非[2] 钟康惠[2] 赵昌新 

机构地区：[1]沈阳地质矿产研究所,辽宁沈阳110034 [2]成都理工大学,四川成都6100591 [3]青海第六地质矿产勘查院,青海平安810600

出　　处：《新疆地质》2010年第3期330-333,共4页Xinjiang Geology

摘　　要：对五龙沟金矿矿集区NW向韧性剪切带中金矿点中的黑云母进行40Ar/39Ar法同位素测年,结果为(242.72±1.69)Ma,表明含金剪切带韧-脆性剪切活动时代及金成矿时代为印支期.区域地质资料显示,此韧性剪切带变形运动学和变形时序与印支期构造-岩浆热液活动事件较一致,其地球动力学背景为造山带构造演化后碰撞伸展构造环境.40Ar-39 isotopic dating for micaceous mineral occurred in NE trend ductile shear zones on the gold-ore collected belt of the Wulonggou, Biotite separated from samples YJG09-1 yield a well-defined 40Ar-39plateau age of （242.72±1.69）Ma,suggest that the age of ductile-brittle shear movement of gold-bearing shear zone and the metallogenic epoch of gold is Indosinian.With regional geological data,？This idea coincides with the deformational of ductile shear and and the accompanying structural-magmatic hydrothermalisms in Indo-Chinese epoch of the re-gion.The geodynamic background of the Wulonggou is extension tectonic environment after collision of orogenic tectonic evolution.

关 键 词：青海 韧性剪切带 40AR/39AR年龄 印支期 

分 类 号：P618.51[天文地球—矿床学] P597.3[天文地球—地质学]