新疆哈图金矿微球粒的发现及其地质意义

DISCOVERY OF MICRO SPHERULITES AND THEIR GEOLOGICAL IMPLICATION IN THE HATU GOLD DEPOSIT,XINJIANG

采自新疆哈图金矿区各地层单元和含矿脉体中的基岩人工重砂样品普遍含有一种“微球粒”物质。通过“微球粒”的一般特征，表面、断面结构、矿物组成和化学成分的研究，认为属消融型宇宙尘。并据此提出区内玄武质母岩浆在形成玄武岩的过程中同化、熔融了含宇宙尘的局部老地层物质；为区内金矿化提供含矿热液的花岗岩属重熔型花岗岩。

Microspherulites were commonly found in man made placer samples of bed rocks from the different stratigraphic units and gold orebodies in the Hatu gold deposit,Xinjiang.After studing their general character,surfacial and sectional structure,mineral and chemical composition,the authors define them as cosmic dusts and conclude that partial old strata with cosmic dusts might be melten and assimilated during the formation of basalt in the area,and the granitic rock which might provide ore bearing hydrothermal solution for the gold mineralization belongs to remelting type granite.