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青海沟里整装勘查区金矿成矿要素及预测意义

Metallogenic elements of gold deposits in the Gouli integrated exploration area in Qinghai Province and their predictive significance

  • 摘要: 通过对沟里?翱辈榍诠辶荨⑺构⑼呃真亍⑸盏却笾行徒鹂蟠惨巴獾刂实鞑榧跋喙刈柿献酆涎芯康幕∩希治隽私鹂蟮某煽笠兀⑻教至嗽げ庖庖濉Q芯拷峁砻鳎汗道镎翱辈榍诮鹂蟮男纬墒贝ξ≈砥冢煽笫芄盘靥崴寡蟊蘸霞跋蛏煺棺暮笤焐交肪持圃迹唤鹂笥朐庞罱鹚谘胰汗叵得芮校鹂蠓植记虢鹚谘胰悍植记呛希撇饨鹚谘胰何鹂蟮目笤床悖挥≈砥谘医饔梦鹂蟮男纬商峁┝巳仍醇俺煽笪镏剩欢嗥诖味狭延虢鹂蟮某煽笞饔霉叵得芮校闳盏—德龙断裂控制金矿的形成和矿体侧伏方向、赋矿标高,是导矿、控矿断裂;北东向、北西向及南北向次级断裂为重要容矿断裂。金矿成矿要素可以归纳为:元古宇金水口岩群、印支晚期岩浆岩和断裂内外接触带三位一体。沟里整装勘查区及周边今后的找矿勘探工作,应围绕香日德—德龙断裂两侧、早—中三叠世花岗闪长岩及金水口岩群寻找金矿;深部找矿应根据矿体侧伏规律布置钻孔等勘探工程。

     

    Abstract: Based on the comprehensive study of field geological survey and related data of large and medium-sized gold deposits such as Guoluolongwa,Asiha,Walega and  Seri  in Gouli integrated exploration area of Qinghai Province,this paper analyzes the metallogenic elements of gold deposits and discusses the significance of prediction.The results show that the formation age of the gold deposits in the area should be late Indosinian,and the mineralization is restricted by the post orogenic environment of the closed collision and extension of the Paleo-Tethys Ocean; Gold deposits are closely related to the Paleoproterozoic Jinshuikou rock group,and the distribution area of gold deposits is consistent with the distribution area of Jinshuikou rock group.It is speculated that the Jinshuikou rock group is the source layer of gold deposits;Late Indosinian magmatism provided heat source and ore-forming materials for the formation of gold deposits;the multi-stage fault structure in the area is closely related to the mineralization of gold deposits,the Xiangride-Delong fault in the area controls the formation of gold deposits,the lateral direction of ore bodies and the ore-bearing elevation,and is the ore-conducting and ore-controlling fault in the area;the NE,NW and SN secondary faults are important ore-bearing faults.The gold metallogenic elements can be summarized as:Paleoproterozoic Jinshuikou rock group,Late Indosinian magmatic rocks,internal and external contact zone fault structure trinity.The prospecting and exploration work in Gouli area and its surrounding area should focus on both sides of the Xiangride-Delong fault,and search for gold deposits in the early-middle Triassic granodiorite and Jinshuikou rock group;drilling and other exploration works should be arranged in deep ore prospecting according to its lateral regulation.

     

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