摘要
托库孜巴依金矿位于阿尔泰山西段南缘克兰弧后盆地内,产于哈巴河斜长花岗岩体外接触带,明显受玛尔卡库里大断裂及其派生次一级断裂构造控制,赋矿岩性为中泥盆统阿勒泰组上亚组海相杂砂岩建造,典型蚀变矿物为绢云母、绿泥石、硅化、黄铁矿等.流体包裹体和稳定同位素研究表明:δD=-126.3‰～-107.0‰,δO18H2O-0.02‰～6.27‰,δS34=0.31‰～11.41‰;成矿温度集中于200～250℃;含盐度很低(6.00‰～9.44‰);成矿压力为1.85×107～3.97×107Pa;pH值为6.91.由此推断成矿流体以大气降水为主,成矿物质具有深源性,主要来源于地层岩石和岩浆岩,矿床成因属浅成中-低温变质热液金矿床.
Tuokuzibayi gold ore is located Kelan arc-shape back basin, south margin of west part of Altai basin. It is produced contact strip of outside slanting long granite in the Kaba River. It is obviously controlled by Maerkaku big fault （toughness cut metamorphism zone）and its derived sub-class fault structure..The gold ore bodies are distributed northeast to Markakoly deep fracture with a range of 400～2 000 m.The gold mine is produced in the marine greywacke formation of the upper sub-Formation of Middle Devonian Altay Formation.It＇s typical altered minerals include sericite,chiorite,silification,pyrite and so on.Some studies of the fluid inclusions and stable isotopes show that：the Value of δD is -126.3‰ to -107.0‰, is -0.02‰ to 6.27‰, δ^34S is 0.31‰ to 11.41‰, the ore-forming temperature and pressure is 200 to 250℃ and 1.85×10^7 to 3.97×10^7 Pa respectively,and Low-middle Salinity（6.00 to 9.44‰ NaCl）,the mean Value of pH is 6.91 .Based on above Studies, we suppose that the ore-forming fluid is mainly meteoric water,the are-forming material has a deep source characteristics and is mainly derived from sedimentary strata and plagioclase granites of Variscan stage.As a result, it Should be a Kind of epithermal middle-low temperature metamorphic hydro-thermal ore deposit. The metallogenetic regulation and mineral prospecting indicators are also expounded in this paper.
出处
《新疆地质》
CAS
CSCD
2007年第3期258-262,共5页
Xinjiang Geology
关键词
托库孜巴依金矿
地质特征
大气降水
矿床成因
Tukuzbuy gold deposit
geological characteristics
meteoric water
oregenesis
