西藏曲水岩基4个系列花岗岩类的特征及构造意义

曲水岩基解体，建立７个超单元和６个独立单元。该岩基由Ｍ型、俯冲Ⅰ型、同碰撞Ⅰ型和同碰撞Ｓ型花岗岩类４个系列组成。着重描述这４个系列花岗岩类的地质学、岩石学、岩石化学、地球化学及就位特征；并就新特提斯洋规模、性质、关闭以及印度板块与拉萨陆块的碰撞、西藏高原隆升机制等提出了一些新认识。

CHARACTERISTICS OF FOUR SERIES OF GRANITOIDS IN THE QUXU BATHOLITH, TIBET, AND ITS TECTONIC SIGNIFICANCE

Seven superunits and six independent units are established for the disintegrated Quxu batholith. The batholith is composed of subduction M type, subduction I type, syn collision I type and syn collision S type granitoids. This paper mainly presents an introduction to the geological, petrological, petrochemical, geochemical and emplacement characteristics of those series of granitoids and discusses their tectonic significance. In addition, the author also puts forward some new ideas about the scale, nature and closing of the Neo Tethys ocean, the collision between the Indian plate and the Lhasa block and the mechanism for the uplift of the Qinghai Tibet plateau.