Collaborative Research: Timing, Extent, and Spatial Progression of Neogene Displacement Transfer, Southern Walker Lane, Western Great Basin
合作研究:西部大盆地沃克巷南部新近纪位移转移的时间、范围和空间进展
基本信息
- 批准号:0948552
- 负责人:
- 金额:$ 14.59万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2010
- 资助国家:美国
- 起止时间:2010-08-15 至 2011-06-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Northwesterly displacement of the Sierra Nevada with respect to the Great Basin in the western US Cordillera has been ongoing for the last 12 to 15 Ma. This motion is accommodated by a complicated and incompletely understood belt of deformation along the western margin of the Great Basin that links major, misaligned strike-slip faults in eastern California and western Nevada. Based on previous research and our preliminary work, we have identified that the deformed belt underlies a region of nearly 15,000 km2 and contains large tectonic blocks that both translate toward the northwest as the crust is pulled apart and also undergo vertical-axis rotations of 20° to 90°. In this project, we will provide a better understanding of the dimensions of the tectonic blocks, how far they have moved laterally, to what degree they experienced vertical-axis rotation, and the spatial-temporal pattern of deformation. Much of the western borderland of North America and many parts of other continents around the world reside in similar tectonic settings and record comparable histories of deformation. This study will provide the opportunity to better understand how and to what degree the translation and rotation of large crustal blocks is accommodated as the continental crust is fragmented in response to the relative movement of lithospheric plates.Crustal response to displacement transfer in structural stepovers linking misaligned segments of large-magnitude transcurrent faults is accommodated by components of translational and rotational displacement and strain and results in complex three-dimensional arrays of structures. The mechanisms by which rotational and translational strain are accommodated either by rigid-blocks and/or by distributed strain and to what degree the translational and rotational processes are coupled in space-time are poorly understood. In this study, we integrate detailed and regional geologic mapping with thermochronologic, structural, and paleomagnetic analysis to unravel the history of transcurrent structures separating the Sierra Nevada and central Great Basin. The objective of the work is to characterize transcurrent and high-angle normal fault displacement, estimate slip on low-angle detachment faults, and assess the relation between translational deformation and differential rotation. Our research results will provide the needed detailed understanding of the spatial and temporal pattern of deformation and supply the constraints to differentiate between coeval and serial translational and rotational deformation histories within the stepover system and provide the means to assess whether or to what degree rotation is accommodated by rigid-body motion or distributed strain processes.
在过去的 12 到 15 Ma 中,内华达山脉相对于美国西部科迪勒拉大盆地的向北位移一直在持续,这一运动是由沿着大盆地西缘的复杂且不完全了解的变形带所适应的。根据之前的研究和我们的前期工作,我们发现该变形带位于加利福尼亚州东部和内华达州西部主要的错位走滑断层之下。并且包含大型构造块,这些构造块在地壳被拉开时会向西北方向平移,并且还会经历 20° 至 90° 的垂直轴旋转。在这个项目中,我们将更好地了解构造块的尺寸以及如何旋转。它们横向移动了多远,经历了垂直轴旋转的程度,以及北美西部边境的大部分地区和世界其他大陆的许多地区都处于类似的构造环境中。并记录可比较的变形历史。这项研究将提供机会更好地了解当大陆地壳响应岩石圈板块的相对运动而破碎时,大型地壳块的平移和旋转是如何以及在多大程度上被适应的。连接大范围横流断层未对准部分的结构跨距中的位移传递由平移和旋转位移和应变的分量调节,并产生复杂的三维结构阵列。应变是通过刚性块和/或分布应变来调节的,而平移和旋转过程在时空中的耦合程度却知之甚少。在这项研究中,我们将详细的区域地质测绘与热年代学、结构和地质学相结合。古地磁分析揭示了分隔内华达山脉和大盆地中部的横流构造的历史。这项工作的目的是表征横流和高角度正断层位移,估计低角度滑脱断层上的滑动,并评估平移断层之间的关系。我们的研究结果将提供对变形的空间和时间模式所需的详细理解,并提供区分步距系统内同时期和串行平移和旋转变形历史的约束,并提供评估是否或需要的方法。刚体运动或分布应变过程可适应多大程度的旋转。
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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John Geissman其他文献
Paleoenvironmental and paleoclimatic evolution and cyclo- and chronostratigraphy of upper permian-Lower triassic fluvial-lacustrine deposits in Bogda Mountains, NW China – Implications for diachronous plant evolution across the permian-triassic boundary
中国西北博格达山上二叠世-下三叠世河流-湖泊沉积物的古环境和古气候演化以及旋回和年代地层学——对跨越二叠纪-三叠纪边界的历时植物演化的启示
- DOI:
10.1016/j.earscirev.2021.103741 - 发表时间:
2021 - 期刊:
- 影响因子:12.1
- 作者:
Wan Yang;Mingli Wan;James L. Crowley;Jun Wang;Xiaorong Luo;Neil Tabor;Kenneth D. Angielczyk;Robert Gastaldo;John Geissman;Feng Liu;Peter Roopnarine;Christian A. Sidor - 通讯作者:
Christian A. Sidor
John Geissman的其他文献
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{{ truncateString('John Geissman', 18)}}的其他基金
Collaborative Research: Terrestrial Late Permian to Early Triassic Earth Systems in NE Pangea: Insights into the Tempo, Effects, and Causes of the End-Permian Mass Extinction
合作研究:盘古大陆东北部的陆地晚二叠世至早三叠世地球系统:深入了解二叠纪末大规模灭绝的节奏、影响和原因
- 批准号:
1714928 - 财政年份:2017
- 资助金额:
$ 14.59万 - 项目类别:
Standard Grant
Collaborative Research: Tectonic Significance of Long Run-Out Coarse-Grained Facies in the Cordilleran Foreland Basin
合作研究:科迪勒拉前陆盆地长程粗粒相的构造意义
- 批准号:
1524578 - 财政年份:2015
- 资助金额:
$ 14.59万 - 项目类别:
Continuing Grant
Quaternary and Late Neogene Growth of the Cucomungo Canyon Restraining Bend and Associated Deformation Rates, Death Valley-Fish Lake Valley Fault System, Western Great Basin
西部大盆地死亡谷-鱼湖谷断层系库科蒙戈峡谷第四纪和新近纪晚期的抑制弯曲和相关变形率的生长
- 批准号:
1318727 - 财政年份:2013
- 资助金额:
$ 14.59万 - 项目类别:
Continuing Grant
Collaborative Research: Integrated Tectonic and Paleomagnetic Study of the Early Cenozoic Rotation and Extrusion of Asian Crust Around the Eastern Himalayan Syntaxis
合作研究:东喜马拉雅构造系亚洲地壳早新生代旋转和挤压的构造和古地磁综合研究
- 批准号:
1139176 - 财政年份:2011
- 资助金额:
$ 14.59万 - 项目类别:
Standard Grant
Collaborative Research: Timing, Extent, and Spatial Progression of Neogene Displacement Transfer, Southern Walker Lane, Western Great Basin
合作研究:西部大盆地沃克巷南部新近纪位移转移的时间、范围和空间进展
- 批准号:
1139177 - 财政年份:2011
- 资助金额:
$ 14.59万 - 项目类别:
Standard Grant
Collaborative Research: Terrestrial Paleoenvironmental Record Through the Permian-Triassic Transition of Texas and New Mexico
合作研究:德克萨斯州和新墨西哥州二叠纪-三叠纪过渡期间的陆地古环境记录
- 批准号:
0843839 - 财政年份:2009
- 资助金额:
$ 14.59万 - 项目类别:
Standard Grant
Collaborative Research: Magma Dynamics in Sill and Dike Systems - Constraints From Magnetic Fabrics and Paleomagnetism in the Karoo Large Igneous Province
合作研究:岩床和岩脉系统中的岩浆动力学 - 来自卡鲁大型火成岩省磁性织物和古地磁的约束
- 批准号:
0738667 - 财政年份:2008
- 资助金额:
$ 14.59万 - 项目类别:
Standard Grant
Collaborative Research: Integrated Tectonic and Paleomagnetic Study of the Early Cenozoic Rotation and Extrusion of Asian Crust Around the Eastern Himalayan Syntaxis
合作研究:东喜马拉雅构造系亚洲地壳早新生代旋转和挤压的构造和古地磁综合研究
- 批准号:
0537604 - 财政年份:2006
- 资助金额:
$ 14.59万 - 项目类别:
Standard Grant
Collaborative Research: Origin of High Magnetic Remanence in Fault Pseudotachylites
合作研究:断层拟泰石高剩磁的成因
- 批准号:
0228849 - 财政年份:2003
- 资助金额:
$ 14.59万 - 项目类别:
Standard Grant
Collaborative Research: Identification of the Plate Boundary Between India and Indochina Through Integrated Petrologic, Structural, and Paleomagnetic Analyses
合作研究:通过综合岩石学、构造和古地磁分析识别印度和印度支那之间的板块边界
- 批准号:
0309910 - 财政年份:2003
- 资助金额:
$ 14.59万 - 项目类别:
Standard Grant
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