摘要
西藏纳个丁日矿区位于班怒结合带内,属于班公湖—怒江成矿带中西段。矿体赋存于早白垩世中酸性岩裂隙带及其侵入接触带和围岩滑脱裂隙中。区内化探异常发育,元素组合有利,各元素套合较好,主成矿元素具有三级水系沉积物异常,浓集中心明显。发现多个地表矿(化)体,其中最高Cu品位达9.17%、Au品位1.21g/t。近年来,班怒成矿带陆续发现了多布杂、青草山等大型-超大型矿床,其主要分布于班怒结合带两侧陆内弧上,而纳个丁日矿区位于结合带内,具备优越的成矿地质条件和较大的找矿潜力。
The Najidingri mining area in Tibet is located in the middle and western part of the Banggongco-Nujiang metallogenic belt.The ore body occurs in the fracture zone of the middle acid rock in the early Cretaceous,the intrusion contacts zone and the slippage fracture of the wall rocks.The geochemical anomaly is developed in the area,the element combination is favorable,the elements are well integrated,the main ore-forming element has the third-order stream sediment anomaly,and the concentration center is obvious.Several surface mineralized bodies were found,with the highest Cu grade of 9.17%and Au grade of 1.21g/t.In recent years,large and super-large deposits such as Duobuzaand Qingcaoshan have been discovered in the Banggongco-Nujiang metallogenic belt,which are mainly distributed in the continental arc on both sides of the belt.The Najidingri mining area is located in the joint zone,which has superior metallogenic geological conditions and greater prospecting potential.
作者
格桑次仁
扎西
杨长进
次仁欧珠
旦增他青
GESANG Ci-ren;Zha Xi;YANG Changjin;CIREN Ou-zhu;DANZENG Ta-qing(Regional geological survey team,Geological Survey Bureau of Tibet,Lhasa 851400)
出处
《四川地质学报》
2023年第4期632-637,647,共7页
Acta Geologica Sichuan
关键词
班怒带
纳个丁日
铜金矿
西藏改则
Bangongco–Nujiangsuture zone
Najidingri
copper gold ore
Geze in Tibet
