Subduction-Related Quartz Syenite Porphyries in the Eastern Qiangtang Terrane, Qinghai—Tibetan Plateau: Constraints from Geochemical Analyses

• 责任者：Zhang Hongrui (Institute of Geology ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Hou Zengqian
• 刊名：Geological Review
• 出版年：2010
• 卷期：56(3)
• 关键词：正长斑岩 ; syenite porphyry ; 岩石地球化学 ; lithogeochemistry ; 青藏高原 ; Qinghai-Tibetan Plateau
• 页码：p.403-412
• 图表：7 illus., 2 tables, 44 refs.
• 分类号：0801
• issnNo：ISSN0371-5736
• isbnNo：CN11-1952/P

It is chronically debated on the Permian tectonic evolution of the northern Qiangtang block, oft-com:office:smarttags" />Qinghai—Tibetan Plateau. Newly identification of the Late Permian quartz syenitic porphyries in the Tuotuo River area may provide some constraints on the Paleo-Tethyan tectonic evolution of the northern Qiangtang, even of the whole northern Qinghai—Tibetan Plateau.  During the ascending and intrusion, fractional crystallization and crustal contamination may have modified the rock’s chemistry. Obviously, there must be a subduction of oceanic slab during the Late Permian along one margin of the northern Qiangtang block.oft-com:office:office" />