DISCUSSION ON GOLD MINERALIZATION TYPE AND ITS RELATION WITH TECTONIC IN NORTHWESTERN JIAODONG

In northwest of Jiaodong,there are three kinds of gold deposits known as altered rock type,quartz vein type and transitional type,all called Linglong Jiaojia type of gold deposit.They have obviously relation of kindred and paragenesis,and were the products of the same tectonic dynamic action.So they have similar metallogenic materials,ore-forming temperature, metallogenic pressure, stable isotope and REE component.These deposits were different in wall-rock,orebody shape,orebody scale,occurence,mineralization feature,ore natural shape etc.They were caused by the differences of ore and rock controlling features,such as tectonics,tectonic position,fault nature,and tectonic power and differentiation happened in later stage of tectonic-magmatic activity.Altered rock type deposit mostly developed in tectonic compression and shear position.The occurence of ore-hosting fault was more gentle with NW dip.The wall rock was well altered.The quartz vein type deposit mostly developed in extension and shear-tension position.The occurence of ore-hosting fault was more steep with the SE dip.The wall rock was slightly altered.The transitional type deposit occured in the position between the above two.Various types of mineralization showed grading transitional relation in vertical and dip directions.The horizontal zoning of mineralization was obvious.