康古尔塔格金矿床氧化带矿物初步研究及意义

氧化带分上、下两亚带，上亚带为矿床硫化物充分氧化、水解形成，主要为铁、锰的氧化物及氢氧化物，自然元素，碳酸盐，氯化物及硝酸盐；下亚带为硫化物氧化形成的硫酸溶液与中酸性火山岩围岩中的Na、K、Ca、Mg、Al等元素形成的各种硫酸盐。通过X射线粉晶衍射分析，部分矿物经化学分析，确定上亚带有自然金、针铁矿、钙锰矿、石英、方解石、石盐、氯铜矿、钾硝石、钠硝石、钙硝石等，下亚带有钠铁矶、磷锶铝矾、钠明矾石、白钠镁矾、羟铝铜铅矶、无水芒硝、斜钾铁矾、斜钠明矾、费羟铝矾、石膏、硬石膏等，其中钠明矶石、羟铝铜铅矶、斜钾铁矶、钙硝石、斜钠明矶、费羟铝矶属国内首次发现。氧化带有大量硫酸盐，为寻找硫化物矿床提供重要信息，氯铜矿广泛分布和自然金的发现揭示有可能找到金铜硫化物矿床。

Significance of oxidized zone minerals in Kanggu'er tage gold deposit

The oxidized zone is divided into upper and lower subzones.The upper subzone resulting from sulfide oxidation and decomposition in ore deposit is mainly composed of oxides and hydrates bearing Fe and Mn,natural element, carbonate, chloride, and nitrates, and lower subzone is composed of a variety of sulfates which are resultants of vitriol solutions formed by sulfides oxidation react on elements of Na, K, Ca, Mg, Al, etc, in enclosing rock of neutral-acid volcanic rock.Through the analysis of X rays powder diffraction and chemical analysis of part minerals it is confirmed that upper subzone contains gold, goethite, todorokite, quartz, calcite, halite, atacamite, nitratite, niter, nitrocalcite, etc.Lower subzone contains natrojarosite, svanbergite, natroalunite, bloedite, osarizawaite, thenardite,yavapaiite,tarmarugite,felsobanyaite,gypsum,anhydrite,etc.And natroalunite, osarizawaite,yavapaiite,nitrocalcite,tamarugite,felsobanyaite are the first discovery in China Oxidezed zone contains a lot of sulfates which supplies significant messages for surveying sulfide deposit,and the wide distribution of tacamite and the finding of gold reveal that Au-Cu sulfide deposit may be found.