The First Discovery of a Tin Deposit Related to Hercynian A-Type Granites in China

This paper introduces the petrological, mineralogical and geochemical fea. tures of the rocks hosting the Sareshik tin deposit—an independent tin deposit related to Hercynian A-type granites discovered in China in 1987. A comparison with the features of A-type granites at home and abroad indicates that some of their petrological features are more typical than those of famous A-type granites of Nigeria. The geological features of the tin deposit are salient and notably different from those of some famous tin deposits in China, so the deposit may represent China's deposits associated with anorogenic granites. This tin deposit was formed in the Hercynian Stage. This type of tin deposit was for the first time discovered in China and is also rare in the world. It is a new type of tin deposit in China.     

我国与海西期A型花岗岩有关钖矿床的新发现

本文介绍我国1987年新发现一处与海西期A型花岗岩有关的独立锡矿床——萨惹什克锡矿。其岩体岩石学、矿物学及地球化学特征与国内外A型花岗岩特征进行了类比,指出其岩石学某些特征不仅比国际上著名的尼日利亚A型花岗岩还要典型,而且锡矿床地质特征特别,明显不同于国内著名的一些锡矿床,可作为我国与非造山花岗岩伴生锡矿床之代表,该锡矿且形成于海西期,在国内属首次发现,在世界上亦罕见,将成为我国一新的锡矿类型。