辽宁暖泉子金矿中的自然钌及其地质意义  

Native Ruthenium in the Nuanquanzi Gold Deposit of Liaoning Province and Its Geological Significance

作　　者：许虹[1] 贺义兴[1] 彭齐鸣 

机构地区：[1]长春地质学院

出　　处：《岩石矿物学杂志》1994年第3期255-259,T001,共6页Acta Petrologica et Mineralogica

摘　　要：暖泉子金矿床是产于太古宙绿岩带中的韧性剪切带型矿床。自然钉及含铂赫碲铋矿发现于其中的黄铁矿石英脉型矿五中。自然钌中Ｗ含量高，反映了矿化区的地球化学背景和矿化温度（＞３００℃）。铂族元素可以作为成矿过程的示踪剂。该矿床中铂族矿物的首次发现支持了绿岩带中的镁铁质岩、超镁铁质岩是金的矿源层的看法。Hosted in the Archean greenstone belt, the Nuanquanzi gold deposit is ofductile shear metamorphic hydrothermal origin,with the mineralization con-trolled by the NW-trending shear belts.Native ruthenium and hedleyite wereidentified in the pyrite quartz lodes.Ruthenium occurs as tabular or irregulargraills or aggregates,mostly less than l0 μm in grain size,It usllally occurs atthe contacts between pyrite and quartz,or less commonly,in cracks of quartz.Structures and textures suggest that the native ruthenium is coeval with thepyrite and quartz,Compared with the native ruthenium from the oxidationzones of ultramafic rocks,the native ruthenium from the Nuanquanzi depositis more enriched in W,Co and Fe and relatively lower in Ru,with the che-mical formula being Ru_(0.675)W_(0.125)Fe_(0.095)Co_(0.064),Pt is extremely inhomogeneousin ruthenium, Hedleyite contains considerable amounts of Pt.The coexistencebetween Ru,Pt and Au throws light on the sources of ore-forming materials.The mafic and ultramafic rocks in the Anshan Group may be the major“goldreservoir”.During the tectono-magmatic remobilization,PGE and gold weretransported upwards,resulting in gold mineralization in the upper part of thegreenstone belt.Such an inference is consistent with the sulfur isotope data,suggesting that S,Au and PGE are derived from the mantle,The first disco-very of platinum group minerals in the deposit supports the suggestion thatmafic and ultramafic rocks in greenstone belts seem most likely to be thesource bed of gold.

关 键 词：自然钌 金矿床 绿岩带 地质意义 

分 类 号：P618.510.4[天文地球—矿床学]