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Structural Geology and Tectonic Evolution of the Eastern Tibetan Plateau : 青藏高原东缘的构造地质与构造演化
Structural Geology and Tectonic Evolution of the Eastern Tibetan Plateau  : 青藏高原东缘的构造...
Structural Geology and Tectonic Evolution of the Eastern Tibetan Plateau : 青藏高原东缘的构造地质与构造演化

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자료유형  
 학위논문 서양
최종처리일시  
20260202105828
ISBN  
9798270224301
DDC  
551
저자명  
El-Fakih Simon, Abijah.
서명/저자  
Structural Geology and Tectonic Evolution of the Eastern Tibetan Plateau : 青藏高原东缘的构造地质与构造演化
발행사항  
[Sl] : University of California, Los Angeles, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
255 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-06, Section: B.
주기사항  
Advisor: Day, Mackenzie Denali.
학위논문주기  
Thesis (Ph.D.)--University of California, Los Angeles, 2025.
초록/해제  
요약This dissertation investigates the structural geology and tectonic evolution of the eastern Tibetan Plateau, a region shaped by the far-field effects of the Cenozoic India-Asia collision. Despite its importance for understanding collisional tectonics, the mechanisms of crustal deformation driving its uplift remain poorly understood. A fundamental issue is the lack of surface constraints due to limited systematic geologic field mapping in this region-a problem highlighted by recent large-magnitude earthquakes rupturing previously unmapped faults. To address this gap, new geologic mapping conducted over a ~30,000 km2 region is integrated with seismic reflection profile interpretations to construct balanced cross-sections, tectonic models, and maps that quantify and constrain deformation in the Longmen Shan, Min Shan, and surrounding Songpan-Ganzi terrane. Specific findings include: (1) systematic along-strike variations in the style, timing, and magnitude of shortening in the Longmen Shan; (2) a previously unrecognized crustal-scale tectonic wedge beneath the Min Shan; and (3) a regionally distributed conjugate strike-slip fault system across eastern Tibet. These findings are synthesized into a three-dimensional tectonic framework that encompasses active crustal deformation, surface uplift, and basin development.The results of this study resolve several long-standing enigmas of the region, including high topography despite unusually slow geodetic slip rates, restricted Cenozoic foreland basin development along the plateau margin, and the inability of range-bounding faults to account for uplift of the Min Shan. The details of crustal deformation outlined in these models contribute to the debate of ductile channel flow versus brittle thrusting for the development of the eastern plateau, where results align most closely with a modified version of the thrust model that features wedge and duplex structure development. The pre-Cenozoic shortening and along-strike structural transitions highlighted by this study are additional features not captured by the previously proposed endmember models. Another contribution of this work is the synthesis of new and previously mapped active faults across this region, which are significant due to the numerous large earthquakes that have occurred along previously unmapped faults in this region, thus improving understanding of seismic hazards. More broadly, this work advances understanding of mechanisms of continental deformation and orogenic plateau growth in collisional settings.
일반주제명  
Geology
일반주제명  
Geophysics
일반주제명  
Plate tectonics
키워드  
Longmen Shan
키워드  
Min Shan
키워드  
Neotectonics
키워드  
Structural geology
키워드  
Tectonics
키워드  
Tibetan Plateau
기타저자  
University of California, Los Angeles Geology 0402
기본자료저록  
Dissertations Abstracts International. 87-06B.
전자적 위치 및 접속  
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MARC

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■1001  ▼aEl-Fakih  Simon,  Abijah.
■24510▼aStructural  Geology  and  Tectonic  Evolution  of  the  Eastern  Tibetan  Plateau  ▼b青藏高原东缘的构造地质与构造演化
■260    ▼a[Sl]▼bUniversity  of  California,  Los  Angeles▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a255  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-06,  Section:  B.
■500    ▼aAdvisor:  Day,  Mackenzie  Denali.
■5021  ▼aThesis  (Ph.D.)--University  of  California,  Los  Angeles,  2025.
■520    ▼aThis  dissertation  investigates  the  structural  geology  and  tectonic  evolution  of  the  eastern  Tibetan  Plateau,  a  region  shaped  by  the  far-field  effects  of  the  Cenozoic  India-Asia  collision.  Despite  its  importance  for  understanding  collisional  tectonics,  the  mechanisms  of  crustal  deformation  driving  its  uplift  remain  poorly  understood.  A  fundamental  issue  is  the  lack  of  surface  constraints  due  to  limited  systematic  geologic  field  mapping  in  this  region-a  problem  highlighted  by  recent  large-magnitude  earthquakes  rupturing  previously  unmapped  faults.  To  address  this  gap,  new  geologic  mapping  conducted  over  a  ~30,000  km2  region  is  integrated  with  seismic  reflection  profile  interpretations  to  construct  balanced  cross-sections,  tectonic  models,  and  maps  that  quantify  and  constrain  deformation  in  the  Longmen  Shan,  Min  Shan,  and  surrounding  Songpan-Ganzi  terrane.  Specific  findings  include:  (1)  systematic  along-strike  variations  in  the  style,  timing,  and  magnitude  of  shortening  in  the  Longmen  Shan;  (2)  a  previously  unrecognized  crustal-scale  tectonic  wedge  beneath  the  Min  Shan;  and  (3)  a  regionally  distributed  conjugate  strike-slip  fault  system  across  eastern  Tibet.  These  findings  are  synthesized  into  a  three-dimensional  tectonic  framework  that  encompasses  active  crustal  deformation,  surface  uplift,  and  basin  development.The  results  of  this  study  resolve  several  long-standing  enigmas  of  the  region,  including  high  topography  despite  unusually  slow  geodetic  slip  rates,  restricted  Cenozoic  foreland  basin  development  along  the  plateau  margin,  and  the  inability  of  range-bounding  faults  to  account  for  uplift  of  the  Min  Shan.  The  details  of  crustal  deformation  outlined  in  these  models  contribute  to  the  debate  of  ductile  channel  flow  versus  brittle  thrusting  for  the  development  of  the  eastern  plateau,  where  results  align  most  closely  with  a  modified  version  of  the  thrust  model  that  features  wedge  and  duplex  structure  development.  The  pre-Cenozoic  shortening  and  along-strike  structural  transitions  highlighted  by  this  study  are  additional  features  not  captured  by  the  previously  proposed  endmember  models.  Another  contribution  of  this  work  is  the  synthesis  of  new  and  previously  mapped  active  faults  across  this  region,  which  are  significant  due  to  the  numerous  large  earthquakes  that  have  occurred  along  previously  unmapped  faults  in  this  region,  thus  improving  understanding  of  seismic  hazards.  More  broadly,  this  work  advances  understanding  of  mechanisms  of  continental  deformation  and  orogenic  plateau  growth  in  collisional  settings.
■590    ▼aSchool  code:  0031.
■650  4▼aGeology
■650  4▼aGeophysics
■650  4▼aPlate  tectonics
■653    ▼aLongmen  Shan
■653    ▼aMin  Shan
■653    ▼aNeotectonics
■653    ▼aStructural  geology
■653    ▼aTectonics
■653    ▼aTibetan  Plateau
■690    ▼a0372
■690    ▼a0592
■690    ▼a0373
■71020▼aUniversity  of  California,  Los  Angeles▼bGeology  0402.
■7730  ▼tDissertations  Abstracts  International▼g87-06B.
■790    ▼a0031
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17361294▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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