Discovery of Quaternary Potassic Volcanic Rocks and the Establishment of Sailipu Formation in Western Gangdis of Tibet, China

详细信息   

• 责任者：Ma Runze (College of Earth Sciences ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Tao Xiaofeng
• 刊名：Journal of Chengdu University of Technology
• 出版年：2008
• 卷期：35(1)
• 关键词：早更新世 ; Lower Pleistocene ; 中更新世 ; Middle Pleistocene ; 火山岩 ; volcanic rocks ; 冈底斯山 ; Gangdise Range
• 页码：p.87-92
• 图表：6 illus., 10 refs.
• 分类号：1400
• issnNo：ISSN1671-9727
• isbnNo：CN51-1634/N

摘要

Large area of potassic volcanic rocks distributed over the Sailipu area of Western Gangdis were originally assigned to the Sailipu Group and the age was Pliocene-Early Pleistocene. The volcanic stratum has been investigated in detail and a section of the volcanic rocks has been remeasured by the authors. Studies of petrology and petrochemistry indicate that such suit of volcanic rocks dominated by lattite belongs to shoshonite series to potassic alkali basalt series. This discovery provides important evidences for the Cenozoic magmatism and tectonic evolution of the Gangdis belt, and is significant for the further study of uplifting mechanism of Qinghai-Tibeten Plateau.