Geometry and Timing of Gneiss Dome Formation, Southern Tibet, China

中国西藏南部片麻岩穹丘形成的几何形状和形成时间

• 批准号: 9526861
• 负责人: Jeffrey Lee
• 金额: $ 20.74万
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-04-01 至 2000-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9526861&HistoricalAwards=false
• 关键词: Geometry; Timing; Gneiss; Dome; Formation

; R o o t E n t r y F " C o m p O b j b W o r d D o c u m e n t D O b j e c t P o o l " " 4 @ + , - . / 0 1 2 3 4 5 F Microsoft Word 6.0 Document MSWordDoc Word.Document.6 ; 9526861 Lee An integrated geological investigation, to be completed in collaboration with Professor Chen, Wenji and Dr. Hao Jie, Institute of Geology, State Seismological Bureau, Beijing, China, is proposed to test and refine postulated mechanisms for the formation of the gneiss domes in southern Tibet. Field-based investigations will focus on the little-studied Kangmar dome and unstudied Lhagoi Kangri dome. Integrated investigations include geologic mapping, structural, kinematic, geochronologic, and thermochronologic investigations within these two domes to document the geometry, kinematics direction, and magnitude of ductile and brittle deformation, the relative timing between pluton emplacement and deformation, and the age of intrusions, ductile deformation and fault motions. These data, integrated with ongoing seismic reflection data by other workers, provide an opportunity to document the space-time evolution of gneiss dome formation within an overall lithospheric convergent setting. The processes that lead to their creation have important implications for the tectonic evolution f the Tib etan plateau. Therefore, an accurate characterization of the development of these gneiss domes in terms of their structural, kinematic, and temporal evolution will have significant implications for the formation of overthickened crust and perhaps the timing that high elevations were achieved on the Tibetan plateau. This project provides an excellent opportunity for structural geologists and geochronologists from the USA and China to collaborate on an integrated field and analytical research project that addresses fundamental questions about processes of gneiss dome formation in a continent-continent collisional tectonic setting. ; Oh +' 0 $ H l D h R:\WWUSER\TEMPLATE\NORMAL.DOT 9526684 Felicia Smith Felicia Smith @ S u m m a r y I n f o r m a t i o n ( * @ @ @ Microsoft Word 6.0 2 ; e = e D j j j j j j j 1 ! ! ! @ l T 5 j j j j j ~ j j j j w 9526861 Lee An integrated geological investigation, to be completed in collaboration with Professor Chen, Wenji and Dr. Hao Jie, Institute of Geology, State Seismological Bureau, Beijing, China, is proposed to test and refine postulated mechanisms for the formation of the gneiss domes in southern Tibet. Field-based investigations will focus on the little-studied Kangmar dome and unstudied Lhagoi Kangri dome. Integrated investigations include geologic mapping, structural, kinematic, geochronologic, and thermochronologic investigations within these two domes to document the geometry, kinematics direction, and magnitude of ductile and brittle deformation, the relative timing between pluton emplacement and deformation, and the age of intrusions, ductile deformation and fault motions. These data, integrated with ongoing seismic reflection data by other workers, provide an opportunity to document the space-time evolution of gneiss dome formation within an overall lithospheric convergent setting. The processes that lead to their creation have important implications for t

;​“我不喜欢你，我不喜欢你，我喜欢你，我喜欢你，我喜欢你，我喜欢你，我喜欢你，我喜欢你，我喜欢你。”4 @ +, -。/ 0 1 2 3 4 5 F Microsoft Word 6.0 Document MSWordDoc。6;​9526861 Lee一项综合地质调查，将与Chen教授、Wenji和Dr.合作完成。实地调查将集中在研究较少的Kangmar穹窿和未研究的Lhagoi Kangri穹窿上。综合调查包括地质制图、构造、运动学、地质年代学和热年代学调查，以记录这两个圆顶内的韧性和脆性变形的几何形状、运动学方向和大小，岩体侵位和变形之间的相对时间，以及侵入物、韧性变形和断层运动的年龄。这些数据与其他工作人员正在进行的地震反射数据相结合，为记录整个岩石圈会聚环境中片麻岩穹丘形成的时空演化提供了机会。导致它们形成的过程对青藏高原的构造演化具有重要意义。该项目为中美两国的构造地质学家和地质年代学家提供了一个绝佳的机会，在一个综合的野外和分析研究项目上进行合作，以解决大陆-大陆碰撞构造背景下片麻质圆顶形成过程的基本问题。;Oh +' 0 $ H l D H R:\WWUSER\TEMPLATE\NORMAL。点 9526684 费利西亚史密斯 费利西亚史密斯 @ y S u m m r I f n o r m t I o n ( *微软Word 6.0;e = e D jjjjjjjjj1 ！!!@ 1 T 5 j j j j ~ j j j j j w 9526861李安综合地质实地调查将集中在很少被研究的Kangmar穹窿和未被研究的Lhagoi Kangri穹窿。综合调查包括地质制图、构造、运动学、地质年代学和热年代学调查，以记录这两个圆顶内的韧性和脆性变形的几何形状、运动学方向和大小，岩体侵位和变形之间的相对时间，以及侵入物、韧性变形和断层运动的年龄。这些数据与其他工作人员正在进行的地震反射数据相结合，为记录整个岩石圈会聚环境中片麻岩穹丘形成的时空演化提供了机会。导致它们产生的过程对t具有重要意义