摘要
康古尔金矿床形成于脆韧性—脆性剪切变形构造演化过程中。应用透射电镜超微技术分析水热成矿期石英位错构造、位错密度及差应力值有助于加深认识剪切构造条件下的成矿动力学机制。石英位错构造特征反映成矿期构造变形环境为中温—中低温、高差异应力、高应变速率。成矿期构造差应力演化呈明显的脉动性,这种脉动性所形成的“应力地震泵吸”机制对金矿成矿至关重要。
Kanggur gold deposit was formed in the tectonic evolutional process from brittle
ductile to brittle shearing deformation.Dislocation micro structures,dislocation density and
differential stress values of quartz from hydrothermal ore forming stages were studied by
means of transmission electron microscope(TEM),which is helpful to understand shearing
tectonic conditions.Disolcation micro structures shows that ore forming tectonic setting
belongs to middle to middle low temprature,high differential stress and high strain rate.Ore
forming tectonic differential stress values shows a remarkable pulse evalution.The "Earthquake
pump" mechanism caused by the pulse evolution has a significance to gold mineralization
引文
[1]张连昌,曾章仁,姬金生,等.康古尔韧性剪切带型金矿构造地球化学特征[J].贵金属地质,1997,6(1):13~21.[2]姬金生,陶洪祥,曾章仁,等.东天山康古尔塔格金矿带地质与成矿[M].北京:地质出版社,1994.95~110.[3]马瑞士,舒良树.东天山构造演化与成矿[M].北京:地质出版社,1997.94~125.[4]许志琴.地壳变形与显微构造[M].北京:地质出版社,1984.51~69.[5]万天丰.古构造应力场[M].北京:地质出版社,1988.58~95.[6]赵伦山,陈岳龙,叶荣,等.胶东金矿成矿构造地球化学动力学[J].现代地质,1996,10(2):213~221.[7]SibsonRH.Faultrocksandfaultmechanism[J].J.Gedl.Soc.1977,33:191~213.[8]SibsonRH,RobertF.High-anglereversefaultsfluidpresurecyclingandmesothermalgold-quartzdeposits[J].Geology,1988,16:551~555.[9]SibsonRH.Earthquakefaultingas9structuralproces[J].J.struc.Geol.1989,11:1~14.