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本文根据钻孔样品对苏州花岗岩主侵入阶段岩石作了较详细的氧同位素研究。内部相岩石全岩、石英与长石的δ18O值变化小，石英和长石的氧同位素组成处于同位素平衡状态，在δ18OQ－δ18Of图上分布于一个很小区域内，表明内部相岩石并未受到雨水热液作用影响；而边缘相岩石的全岩δ18O变化明显，石英和长石的氧同位素组成处于极端不平衡状态，在δ18OQ－δ18Of图上，呈近乎垂直状态分布，表明已受到雨水热液作用的显著影响。强烈的水一岩交换作用还导致了Nb、Ta、Zr、Hf、Th等稀有元素在边缘相的矿化作用。本文还对苏州花岗岩的源区物质特征作了讨论。
In this paper, a detailed oxygen isotope study of rock samples from the main intrusive stage of granites in Suzhou is carried out based on the drilling samples. The δ18O value of quartz and feldspar is small in isotopic composition of isotopic composition of quartz and feldspar, and is distributed in a small area on the δ18OQ-δ18Of diagram, indicating that the rock in the inner phase is not exposed to rain water Hydrothermal processes. However, the δ18O of the whole rock in the marginal facies obviously changes. The oxygen isotopic composition of quartz and feldspar is in an extremely unbalanced state, and is near vertical distribution on the δ18OQ-δ18Of diagram, indicating that it has been affected by rain hydrothermal fluids The significant impact. The intense water-rock exchange also resulted in the mineralization of marginal facies such as Nb, Ta, Zr, Hf, Th and other rare elements. This article also discusses the source material characteristics of granites in Suzhou.