doi:10.16186/j.cnki.1673-9787.2020030062

Received:2020/03/17

Revised:2020/04/13

Published:2021/11/15

Study on the ore-bearing properties of strata and rock masses in Dorniang area ， Qinghai Province

LIU Liang1,2, WANG Chao2, SUN Zhanying2, ZHANG Jie2, MA Yunchao2, ZHAO Xiangguo2, YANG Yudong2

1.Guangxi Baise Natural Resources Bureau， Baise 533000 ， Guangxi， China， Mian- yang  621010 ， Sichuan， China;2.Northwest Sichuan Geological and Mineral Exploration Team， Mian- yang  621010 ， Sichuan， China

Abstract:In order to study the ore-bearing properties of strata and rock masses in Dorniang area ， the characteristic parameters ， distribution and evolution of elements in each geological unit were analyzed based on 1：50 000 stream sediment survey. In the study area ， Au ，As and Sb were strongly differentiated（C>1.5 ） ，Hg showed differentiation， Bi showed relatively uniform distribution ， and other elements showed uniform distribution. In second and third members of Gande formation ， Qingshuihe formation and granodiorite ， the elements were mostly distributed in low background and poor. The first member of Qingshuihe formation was characterized by strong enrichment of As ，Sb ，Au and Bi； The enrichment sequence from high to low was Au（2.39）→As（2.31）一Sb（2.15）一Bi（1.24 ） ；As（4.01 ）and Au（2.00 ） were strongly differentiated .As and Sb in monzonitic granite porphyry were strongly enriched and differentiated ， Bi and Au were enriched and distributedl， showing characteristics of differentiation ， having the potential to search for structural hydrothermal gold and antimony deposits. In the Quaternary strata， Sb was enriched and distributed， showing strong differentiation， Au and As were differentiated. It had the potential to search for placer gold and placer antimony deposits. Gold and antimony were the main ore types in the area， and the best enrichment age was the Late Triassic. The ore-bearing geological units were the first member of Qingshuihe formation and the monzonite granite porphyry.

Key words:Doriang area;stream sediment;ore-bearing property;geochemical exploration

 青海多尔娘地区地层和岩体含矿性研究_刘亮.pdf