| The Indosinian-Yanshan gold-bearing and antimony(rare earth,tungsten,tin,mercury)metallogenic belts in the North Bayankala,Qinghai Province are important gold metallogenic belts in Qinghai Province.Many years of geological exploration work have discovered large deposits in the metallogenic belt(Dachangrockgoldmine),mediumsizeddeposits(jiagelongwagoldmine(antimony ore),Dachang Gravelmine,Kerzancheng Gravelmine,Doka Gravelmine,Jika Gravelmine),small deposits(DongchengGongma rock goldmine,Dongdatan antimony and gold,Qingshuichuan Gravelmine)and so on.The above deposits are mainly concentrated around the large-scale gold deposits in the large deposits.There is no substantial prospecting progress in the western and eastern sections.The author chooses Qinghai Beibayanka Indo-Yinshan gold,antimony(rare earth,tungsten,tin).,the mercury deposits in the western part of the metallogenic belt,as the research object,in the mining area after 1:25 million regional geochemical exploration,1:50,000 chemical anomaly verification,mineral investigation and evaluation,mineral foresight for nearly 5 years of field geology Work,through the different scales of geochemical anomaly characteristics as the main line,as well as geological structure,rock ore characteristics and large field gold deposits for comparative study.The strata of the Zangjingou mining area belong to the Qumalai stratum in the Bayan Hara strata,which is the Early Middle Permian Changmahe Formation and is divided into sandstone slate and slate sandstone sections;The North Bayan Kala Mountain orogenic belt in the south of the unit's joint site.The zone is dominated by the thrust-fold structure formed by the north-south thrust thrusting of the Dongkunnan tectonic belt.The structure is dominated by fault structures,consisting of the northeast-southwest and near east-west faults;Porphyry veins,quartz diorite porphyrites,quartz porphyry development;metamorphism is dominated by regional low temperature dynamic metamorphism;1:250,000 water system sediment geochemical anomaly elements are combined into Au,As,Sb,Cu,Ni;The geochemical anomaly of 1:500 water sediments is AuAsSbCu,accompanied by W-Mo and Zn,and tightly nested;1:10000 soil geochemical anomaly is AuAsSb combination;ore industrial type mainly includes gold ore(pyrite,brown iron)Mineral,arsenopyrite,stibnite ore,gold ore,gold-copper ore(malachite,copper blue ore,chalcopyrite);gangue minerals are mainly quartz,calcite,sericite,carbonate minerals,etc.;The rock is generally broken and affected by the structure,and there are fragmented rocks or mylonite.The pyrite mineralization is common,and silicification is observed locally.The mineralization is represented by pyrite mineralization,limonite mineralization and stibnite mineralization.The alteration is characterized by silicification,muddy and carbonation.It is believed that the Zangjingou mining area has certain prospecting prospects,the main prospecting direction is gold,the genetic type is “ "medium and low temperature hydrothermal pulse type" ” gold deposit;the possibility of forming medium-large gold deposits in the mining area is low;the gold formed in the late Ming-Indian branch The mine is seriously damaged by the northeast,north and south secondary structures;the next step can be traced to the northeastward tectonic development in the area,especially the combination with the northwest and near east-west structure;the study considers the Beibayankala gold mineralization The ore-forming process and mineralization period of the western belt are similar to those of the Dachang gold deposit.The Jinyu deposit formed in the late Indosinian period suffered from the northeast-oriented secondary fault destruction.The overall prospecting prospect in the western section is not optimistic. |
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