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作者研究了德兴铜厂花岗闪长斑岩的氧同位素组成特征在垂直方向上的变化规律，及蚀变作用对花岗闪长斑岩全岩和单矿物氧同位素组成的影响。结果表明，从地表到深部，花岗闪长斑岩全岩和长石单矿物的δ１８ Ｏ 值总体上有逐渐降低的趋势，反映花岗闪长斑岩受到已演化了的大气降水水岩氧同位素交换作用的影响。水岩交换作用对花岗闪长斑岩氧同位素组成的影响在浅部和深部是不同的，这主要受控于水岩交换温度和交换水的初始氧同位素组成等因素。石英的氧同位素组成及变化特征不同于全岩和长石，其值与岩石的蚀变作用有关。从花岗闪长斑岩的氧同位素组成及其变化规律可以推论，由大气降水演化为德兴斑岩铜矿成矿热液是可能的。
The authors studied the vertical variation of oxygen isotopic composition of granodiorite porphyry in Dexing copper plant and the effect of alteration on the composition of oxygen isotopes of the whole rock and single mineral of granodiorite porphyry. The results show that from the surface to the deep, the δ18O value of granite diorite porphyrite whole rock and feldspar monolith generally decreases gradually, which indicates that the granodiorite porphyry has been affected by the evolution of atmospheric precipitation water rock Effect of Oxygen Isotope Exchange. The effect of water-rock exchange on the oxygen isotopic composition of the granodiorite porphyry is different between shallow and deep, mainly due to factors such as the water-rock exchange temperature and the initial oxygen isotope composition of the exchange water. Oxygen isotopic composition and variation characteristics of quartz are different from those of whole rock and feldspar, and their values are related to rock alteration. From the oxygen isotopic compositions of granodiorite porphyry and its variation, it can be deduced that it is possible to evolve from atmospheric precipitation into ore-forming hydrothermal fluids of Dexing porphyry copper deposit.