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曲水岩基是组成冈底斯花岗岩类岩带的岩基之一。由于该岩基地处交通要道,临近拉萨,因此自五十年代以来,许多地质学家在这里工作过。本岩基也是冈底斯岩带中同位素地质年代学研究得最多、最详细的一个岩基。前人的研究表明,对曲水岩基的时代和成因的认识分歧很大。我们自1974年以来持续对该岩基的岩石学、地球化学和同位素地质年代学进行了研究。本文就1980年以来,作者在法国巴黎地球物理研究所C.J.Allègre教授实验室以及中国科学院地质研究所对该岩基的时代、成因进行的U-Pb和Rb-Sr同位素研究的成果作一概述和讨论
Qushuiyanji is one of the rock formations that make up the Gangdese granite belt. Because of the traffic base of this rock base near Lhasa, many geologists have worked here since the 1950s. The rock base is also the most studied and most detailed rock base in the isotope geochronology of the Gangdese rock belt. Previous studies show that there is great divergence of understanding of the age and origin of Qushuiyan base. We have continuously studied the petrology, geochemistry and isotopic geochronology of this rock mass since 1974. In this article, we summarize the results of the U-Pb and Rb-Sr isotope studies on the age and genesis of the rock foundation since the year of 1980 by Professor CJAllègre Laboratory, Institute of Geophysics, Paris, France, and the Institute of Geology, Chinese Academy of Sciences discuss