SGER: Testing the Viability of (U-Th)/He Thermochronology in Complex Tectonic Systems
SGER: Testing the Viability of (U-Th)/He Thermochronology in Complex Tectonic Systems
批准号:
0221133
负责人:
Kevin Furlong
金额:
$1.8万
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
2002
资助国家:
美国
项目状态:
已结题
起止时间:
2002-05-01 至 2003-04-30
中文摘要
北方加州海岸山脉的折返作用,以及一般的造山带,是驱动隆升的地球动力学过程与响应隆升速率和模式的地表过程相互作用的结果。各种方法已被用来确定模式的剥露,但放置强大的,量化的限制,这些估计是困难的,因为反馈和大规模的地球动力学,热,景观evolutionprocess之间的联系。目前迫切需要一种技术来限制地壳浅层(低温)岩石的轨迹,以限制活动造山带的隆起和折返。最近,(U-Th)/He热年代学已被确定为一个潜在的工具,以帮助定量限制折返和隆升。(U-Th)/He系统的优点是封闭温度低(磷灰石为60-70 ℃),因此原则上它记录了最后几公里的去顶过程。作为一种低温热时计,使(U-Th)/He对地貌研究如此有吸引力的相同特性也提出了关于其在复杂的热历史和/或构造历史地区的效用的问题。目前还不确定这一工具是否能从一个复杂的信号中提取有意义的信息,该信号既包含了折返历史,也包含了由折返驱动的不可避免的热反馈。在本项目中,我们将应用(U-Th)/He定年技术,结合景观演化、热动力学和地球动力学模拟,来评估(U-Th)/He定年技术是否可以可靠地应用于热或地貌不稳定的活动构造地区。
英文摘要
Exhumation in the northern California Coast Ranges, and orogens in general, results fromthe interplay of geodynamic processes that drive uplift and surface processes that respond to therates and patterns of uplift. A variety of approaches have been used to determine patterns ofexhumation, but placing robust, quantifiable constraints on these estimates is difficult because ofthe feedbacks and linkages among large scale geodynamic, thermal, and landscape evolutionprocesses. There is a critical need for a technique to constrain the trajectory of rocks at shallow-crustal (low-temperature) levels to constrain uplift and exhumation in active orogenic belts. Mostrecently, (U-Th)/He thermochronometry has been identified as a potential tool to helpquantitatively constrain exhumation and uplift. The (U-Th)/He system has the advantage of a lowclosure temperature (~ 60-70 C for apatite) and thus in principal it records the last fewkilometers of unroofing. As a low-T thermochronometer the same characteristics that make (U-Th)/He so appealing for geomorphic studies also raise questions about its utility in regions ofcomplex thermal and/or tectonic histories. It is uncertain whether this tool can extract meaningfulinformation from a complex signal that incorporates both the exhumation history and theinevitable thermal feedbacks driven by that exhumation. In this project we will apply (U-Th)/Hethermochronometry coupled with landscape evolution, thermal and geodynamic modeling, toevaluate if (U-Th)/He dating can be confidently applied in regions of active tectonism that are notin thermal or geomorphic steady-state.
期刊论文(0)
专著(0)
科研奖励(0)
会议论文
Collaborative Research: Evaluating the contribution of crustal deformation to the present-day tectonics of convergent margins: the southern Cascadia forearc
-
批准号:1757581
-
项目类别:Standard Grant
-
资助金额:$17.03万
-
财政年份:2018
-
负责人:Kevin Furlong
-
依托单位:
EAGER: Upper-plate Response to a Great Eathquake: Integrating Deformation from Seismic to Geologic Timescales
-
批准号:1153317
-
项目类别:Standard Grant
-
资助金额:$10.22万
-
财政年份:2011
-
负责人:Kevin Furlong
-
依托单位:
Northern California Plate Boundary Evolution: Workshop Focused on Defining LIDAR (ALSM) Targets and Priorities
-
批准号:0544540
-
项目类别:Standard Grant
-
资助金额:$2.84万
-
财政年份:2006
-
负责人:Kevin Furlong
-
依托单位:
Active Learning in Large Enrollment Classes: Learning Modules that Work
-
批准号:0607995
-
项目类别:Continuing Grant
-
资助金额:$15.0万
-
财政年份:2006
-
负责人:Kevin Furlong
-
依托单位:
Plate Boundary Geodynamics - The New Zealand Observatory: A Workshop Proposal
-
批准号:0530977
-
项目类别:Standard Grant
-
资助金额:$2.13万
-
财政年份:2005
-
负责人:Kevin Furlong
-
依托单位:
Collaborative Research: : Co-evolution and Dynamic Interplay of the San Jacinto and Southernmost San Andreas Fault Zones
-
批准号:0207520
-
项目类别:Standard Grant
-
资助金额:$7.62万
-
财政年份:2002
-
负责人:Kevin Furlong
-
依托单位:
Geodynamics and Active Tectonics of Fiordland, New Zealand: Workshop
-
批准号:0118939
-
项目类别:Standard Grant
-
资助金额:$1.5万
-
财政年份:2001
-
负责人:Kevin Furlong
-
依托单位:
Collaborative Research: Geodynamics of the Eastern California Shear Zone
-
批准号:0003396
-
项目类别:Standard Grant
-
资助金额:$14.71万
-
财政年份:2001
-
负责人:Kevin Furlong
-
依托单位:
Collaborative Research: Tectonically Driven Landform Response to the Mendocino Crustal Conveyor, Northern Coast Ranges, California
-
批准号:9902937
-
项目类别:Standard Grant
-
资助金额:$12.62万
-
财政年份:1999
-
负责人:Kevin Furlong
-
依托单位:
Lithospheric Tectonics of a Transpressional Plate Boundary Fiordland, New Zealand
-
批准号:9725187
-
项目类别:Standard Grant
-
资助金额:$21.28万
-
财政年份:1998
-
负责人:Kevin Furlong
-
依托单位:
Active Plate Boundary Tectonics Along the San Andreas
-
批准号:9628347
-
项目类别:Standard Grant
-
资助金额:$20.25万
-
财政年份:1996
-
负责人:Kevin Furlong
-
依托单位:
The Structural Framework of the San Francisco Bay Area and its Implications for Earthquake Hazards: Workshop
-
批准号:9412260
-
项目类别:Standard Grant
-
资助金额:$1.0万
-
财政年份:1994
-
负责人:Kevin Furlong
-
依托单位:
Implications of Grain Growth Observations for the Evolution of the Western Mediterranean Upper Mantle
-
批准号:9405820
-
项目类别:Standard Grant
-
资助金额:$2.61万
-
财政年份:1994
-
负责人:Kevin Furlong
-
依托单位:
COLLABORATIVE RESEARCH: Thermal Modelling of Himalayan Geology
-
批准号:9314662
-
项目类别:Standard Grant
-
资助金额:$1.56万
-
财政年份:1993
-
负责人:Kevin Furlong
-
依托单位:
Workshop on Numerical Modeling of Lithospheric and Mantle Dynamics, to be held August 6-11, 1991, Weilburg, Germany
-
批准号:9111113
-
项目类别:Standard Grant
-
资助金额:$2.3万
-
财政年份:1991
-
负责人:Kevin Furlong
-
依托单位:
Rheology of Transform Plate Boundaries
-
批准号:9104185
-
项目类别:Standard Grant
-
资助金额:$10.36万
-
财政年份:1991
-
负责人:Kevin Furlong
-
依托单位:
Thermal-Mechanical Evolution of the Northern San Andreas Fault System
-
批准号:8816966
-
项目类别:Continuing Grant
-
资助金额:$9.81万
-
财政年份:1989
-
负责人:Kevin Furlong
-
依托单位:
Collaborative Research: Evolution of Continental Lithos- phere - Constraints from Seismic and Thermal-mechanical Modeling of Triple Junction Migration in the Western N. Amer
-
批准号:8417276
-
项目类别:Standard Grant
-
资助金额:$3.0万
-
财政年份:1985
-
负责人:Kevin Furlong
-
依托单位:
Timing of Volcanic Events by Secular Variation and Thermal Modeling
-
批准号:8313743
-
项目类别:Standard Grant
-
资助金额:$4.03万
-
财政年份:1984
-
负责人:Kevin Furlong
-
依托单位:
Collaborative Research: Thermal Aspects of the Basin and Range - Colorado Plateau Transition
-
批准号:8219113
-
项目类别:Standard Grant
-
资助金额:$1.13万
-
财政年份:1983
-
负责人:Kevin Furlong
-
依托单位:
海外基金