Collaborative Research: High-resolution Basin Analysis of a Large-offset Extensional System, Lake Mead Domain, East-Central Basin and Range Province
合作研究:大偏移距伸展系统、米德湖域、中东部盆地和山脉省的高分辨率盆地分析
基本信息
- 批准号:0838596
- 负责人:
- 金额:$ 19.77万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2009
- 资助国家:美国
- 起止时间:2009-03-01 至 2014-02-28
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This project aims to determine the tectonic and paleogeographic development of the central Basin and Range in the Lake Mead area near Las Vegas, Nevada, through a high-resolution analysis of syn-extensional basins. This region includes low-angle detachment faults, normal faults, transtensional fault systems, areas of complex three-dimensional strain with extensional and contractional structures, and locally voluminous magmatism. This study will focus on three major questions that are important for extensional tectonics globally: (1) Is there a predictable series of processes in the evolution of a major extensional episode in wide, magmatic rifts built on thick crust such as in the Basin and Range? (2) Are extensional processes in the internal part of wide continental plate boundaries controlled by far-field or internal forces? (3) How does climate change and evolving topography affect sedimentation in a major extensional orogen? The main hypotheses the research team is testing are that: (1) the Lake Mead domain developed from east to west in discrete stages from detachment faulting to transtensional faulting, to tectonic escape accompanied by shortening; (2) extension, detachment faulting, and exhumation were initially driven by over thickened crust, but the temporal evolution was controlled by far-field plate boundary changes; (3) changes in patterns and rates of faulting exert a first-order control on basin geometry and stratal thickness, but climate controls significant details of the stratal architecture that have heretofore been attributed to tectonic processes. Basin analysis techniques - including characterization of stratigraphic architecture, facies analysis, geochronology, structural mapping, and stable isotope geochemistry - are being utilized to address these hypotheses.This research will examine Miocene age basins in Lake Mead to determine the detailed development of faulting and the changing landscape between 6 and 10 million years ago during an episode of crustal extension. This is the geologic episode that fundamentally formed the low landscape of the region and made the Basin and Range a distinct province from the adjacent Colorado Plateau. Despite decades of research, there remain fundamental unanswered questions about the mechanism and evolution of deformation in the central Basin and Range that this project aims to address. The research has wide application because extensional regions are common hosts of oil and gas globally and the Basin and Range is considered a well exposed example of these processes.
该项目旨在通过对同伸展盆地的高分辨率分析,确定内华达州拉斯维加斯附近米德湖地区中央盆地和山脉的构造和古地理发展。该地区包括低角度拆离断层、正断层、张扭断层系统、具有伸展和收缩构造的复杂三维应变区以及局部大量岩浆活动。本研究将集中于对全球伸展构造学具有重要意义的三个主要问题:(1)在建立在厚地壳上的广泛的岩浆裂谷(如盆地和山脉)中,在一个主要伸展幕的演化过程中是否存在一系列可预测的过程?(2)宽大陆板块边界内部的伸展过程是受远场还是内力控制?(3)气候变化和地形演变如何影响主要伸展造山带的沉积作用?研究小组正在验证的主要假设是:(1)密德湖域自东向西经历了从拆离断层到张扭断层再到构造逃逸并伴随缩短的不连续阶段:(2)伸展、拆离断层和折返最初是由地壳过厚驱动的,但时间演化受远场板块边界变化控制;(3)断层活动模式和速率的变化对盆地的几何形状和地层厚度具有一级控制作用,但气候控制着迄今被认为是构造作用的地层结构的重要细节。盆地分析技术--包括地层结构特征、相分析、地质年代学、构造制图和稳定同位素地球化学--正被用来解决这些假设。这项研究将检查米德湖中新世盆地,以确定600万至1000万年前地壳伸展期间断层的详细发展和景观变化。这是地质事件,从根本上形成了该地区的低景观,并使盆地和山脉从邻近的科罗拉多高原独特的省。尽管进行了数十年的研究,但本项目旨在解决的关于中央盆地和山脉变形机制和演变的基本问题仍然没有得到解答。该研究具有广泛的应用,因为伸展区域是全球石油和天然气的共同宿主,盆地和山脉被认为是这些过程的良好暴露的例子。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Paul Umhoefer其他文献
Paul Umhoefer的其他文献
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{{ truncateString('Paul Umhoefer', 18)}}的其他基金
Collaborative Research: Evaluating the Influence of Eocene Ridge Subduction on Magmatism, Deformation, and Basin Evolution, Pacific NW
合作研究:评估始新世洋脊俯冲对太平洋西北地区岩浆作用、变形和盆地演化的影响
- 批准号:
1119063 - 财政年份:2012
- 资助金额:
$ 19.77万 - 项目类别:
Continuing Grant
COLLABORATIVE RESEARCH: Central Anatolian Tectonics (CD-CAT): Surface to mantle dynamics during collision to escape
合作研究:安纳托利亚中部构造(CD-CAT):碰撞逃逸过程中的地表到地幔动力学
- 批准号:
1109826 - 财政年份:2011
- 资助金额:
$ 19.77万 - 项目类别:
Continuing Grant
Collaborative Research: Reconstructions of the Gulf of California - Salton Trough Plate Boundary Since 14 Ma: A Digital Synthesis of Recent Advances and Outstanding Problems
合作研究:自 14 Ma 以来加利福尼亚湾 - 索尔顿海槽板块边界的重建:最新进展和突出问题的数字综合
- 批准号:
0948167 - 财政年份:2010
- 资助金额:
$ 19.77万 - 项目类别:
Standard Grant
Collaborative Research: Neotectonics across an active Oblique-Divergent Plate Margin, Southwestern Gulf of California
合作研究:加利福尼亚湾西南部活跃的斜发散板块边缘的新构造运动
- 批准号:
0505348 - 财政年份:2005
- 资助金额:
$ 19.77万 - 项目类别:
Standard Grant
Margins: Collaborative Research: Seismic and Geologic Study of Gulf of California Rifting and Magmatism
边缘:合作研究:加利福尼亚湾裂谷和岩浆作用的地震和地质研究
- 批准号:
0111738 - 财政年份:2002
- 资助金额:
$ 19.77万 - 项目类别:
Standard Grant
Collaborative Research: The Four-Dimensional Pattern of Rifting in the Southern Gulf of California
合作研究:加利福尼亚湾南部裂谷的四维模式
- 批准号:
0203616 - 财政年份:2002
- 资助金额:
$ 19.77万 - 项目类别:
Standard Grant
RUI: COLLABORATIVE RESEARCH: Active Strain within the Pacific-North America Oblique-Divergent Plate Boundary, Baja California Sur, Mexico
RUI:合作研究:墨西哥南下加利福尼亚州太平洋-北美斜发散板块边界内的活跃应变
- 批准号:
9802792 - 财政年份:1998
- 资助金额:
$ 19.77万 - 项目类别:
Standard Grant
RUI: Collaborative Research: Quaternary Deformation in the Cascades Foothills and Southern Puget Lowland, Washington
RUI:合作研究:华盛顿州喀斯喀特山麓和普吉特低地南部的第四纪变形
- 批准号:
9627856 - 财政年份:1996
- 资助金额:
$ 19.77万 - 项目类别:
Standard Grant
RUI: COLLABORATIVE RESEARCH: Active Tectonics of a Young Oblique-Rifted Continental Margin, Loreto Area, Baja California Sur, Mexico
RUI:合作研究:墨西哥南下加利福尼亚州洛雷托地区年轻斜裂大陆边缘的活跃构造
- 批准号:
9526506 - 财政年份:1995
- 资助金额:
$ 19.77万 - 项目类别:
Standard Grant
RUI: Jurassic-Cretaceous Tectonostratigraphy and Structure of the Western Margin of the Intermontane Terrane, Chilko Lake Area, British Columbia
RUI:侏罗纪-白垩纪构造地层学和山间地体西缘结构,奇尔科湖地区,不列颠哥伦比亚省
- 批准号:
9304426 - 财政年份:1993
- 资助金额:
$ 19.77万 - 项目类别:
Standard Grant
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