Kinematics and dynamic implications of terrane transfer, a case study from Baja California, Mexico

地体转移的运动学和动力学影响，墨西哥下加利福尼亚州的案例研究

• 批准号: 31291521
• 负责人: Professor Dr. Valerian Bachtadse, since 11/2009
• 金额: --
• 依托单位: Sektion Geophysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/31291521?language=en
• 关键词: Kinematics; dynamic; implications; terrane; transfer

Many continental plate boundaries appear to be composed of various accreted terranes (e.g. California, Alaska, Sumatra, Sulawesi sea, Mediterranean sea). Such terranes have been ruptured from the continental plate along the plate boundary and transferred from one plate to another, in a process which is poorly understood. The observed kinematics can be outlined as a complex deformation pattern of interacting blocks and plates, separated by active faults and partition slip across the plate boundary. We suggest the Baja California peninsula, Mexico (Baja) as a study region for the kinematics settings and their dynamic implications of terrane transfer. In particular we want to evaluate the current kinematics of Baja, its coupling with the Pacific Plate (PA), its effect on obliquerifting in the Gulf of California to the east and to the north, the impact of Baja with the North American plate (NA) in southern California. Coupling geodetic measurements from Global Positioning System (GPS) with numerical modeling we constrain the kinematics of this region and quantify the dynamic implications. Three dense GPS networks in Baja California will provide observations of lithospheric deformation and can aid in answering questions about regional kinematics, as well as strain and slip rates along single faults. Such data is also important for estimating seismic hazard in populated regions.

许多大陆板块边界似乎是由各种增生体组成的（如加州、阿拉斯加、苏门答腊、苏拉威西海、地中海）。这种岩石圈是从大陆板块沿着板块边界破裂，并从一个板块转移到另一个板块的，这一过程人们还知之甚少。所观察到的运动学可以概括为相互作用的块体和板块的复杂变形模式，由活动断层和跨板块边界的分区滑动分开。我们建议的下加利福尼亚半岛，墨西哥（巴哈）作为一个研究区域的运动学设置和动力学意义的水转移。特别是，我们要评估目前的运动学巴哈，它与太平洋板块（PA）的耦合，其对东部和北部的加州湾的地壳抬升的影响，巴哈与北美板块（NA）在南部加州的影响。耦合全球定位系统（GPS）的大地测量与数值模拟，我们约束该地区的运动学和量化的动态影响。下加利福尼亚的三个密集的GPS网络将提供岩石圈变形的观测，并有助于回答有关区域运动学以及沿着单一断层的应变和滑动速率的问题。这些数据对于估计人口密集地区的地震危险也很重要。

项目成果

Strain rate patterns from dense GPS networks

• DOI: 10.5194/nhess-9-1177-2009
• 发表时间: 2009-07
• 期刊: Natural Hazards and Earth System Sciences
• 影响因子: 4.6
• 作者: M. Hackl;R. Malservisi;S. Wdowinski

New constraints on relative motion between the Pacific Plate and Baja California microplate (Mexico) from GPS measurements

• DOI: 10.1111/j.1365-246x.2007.03494.x
• 发表时间: 2007-09
• 期刊: Geophysical Journal International
• 影响因子: 2.8
• 作者: C. Plattner;R. Malservisi;T. Dixon;P. LaFemina;G. Sella;J. Fletcher;F. Suárez‐Vidal

On the Plate Boundary Forces that Drive and Resist Baja California Motion

论驱动和抵抗下加利福尼亚州运动的板块边界力

• DOI: 10.1130/g25360a.1
• 发表时间: 2009
• 期刊: Geology
• 影响因子: 5.8
• 作者: Plattner;R. Malservisi;R. Gover
• 通讯作者: R. Gover

Development of the Eastern California Shear Zone — Walker Lane belt: The effects of microplate motion and pre-existing weakness in the Basin and Range

• DOI: 10.1016/j.tecto.2009.11.021
• 发表时间: 2010-04
• 期刊: Tectonophysics
• 影响因子: 2.9
• 作者: C. Plattner;R. Malservisi;K. Furlong;R. Govers