US-Turkey Cooperative Research: Integrated Seismological Studies of Crust and Upper Mantle Structure in Western Anatolia

美国-土耳其合作研究：安纳托利亚西部地壳和上地幔结构的综合地震学研究

• 批准号: 0217493
• 负责人: Brian Mitchell
• 金额: $ 3.45万
• 依托单位: Saint Louis University
• 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
• 起止时间: 2002-08-01 至 2004-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0217493&HistoricalAwards=false
• 关键词: US; Turkey; Cooperative; Research; Integrated

0217493MitchellDescription:This award is for support of a joint research project by Dr. Brian Mitchell, Dr. Lupei Zhu, both at the Department of Earth and Atmospheric Sciences at Saint Louis University, Saint Louis, Missouri and Dr. Nihal Akyol, Department of Geophysical Engineering at Dokuz Eylul University, Izmir, Turkey. They plan to conduct a seismological study of the western part of Turkey using groups of both high-frequency (2 Hz) and broadband seismographs. They plan to use data from the high-frequency linear array to obtain a two-dimensional structural model of the grabens and underlying rock by using teleseismsic receiver functions and employing a stacking procedure recently developed by Dr. Zhu. They will use both the linear array and regional array recordings of local earthquakes to perform a combined inversion for precise event location and a tomographic velocity model of the region, and will use data from the broadband instruments for several additional studies. Objectives of this project are to obtain models for velocity structure, including possible anisotropy, for the region, to ascertain the degree of agreement or disagreement among crust/upper mantle models of anisotropy obtained in different locations and by different methods, to infer from those models the directions and consistency of mantle flow and orientation of the crustal stress fields, and to determine the best methods for obtaining information on anisotropic structure in a region of complex structure and tectonics.Scope:The selected sites of this study are particularly suitable for the proposed research. Western Turkey is one of the most seismically active continental regions in the world, and much of it is undergoing extensive north-south extensional deformation. Because the region experiences a large number of low to medium-magnitude earthquakes it is particularly suitable for a seismological study of the continental crust in Eurasia. The region's high attenuation values have been attributed to fluid-filled cracks, which tend to cause the crust to be anisotropic. The project will lead to a better understanding of the tectonics of Western Anatolia, which comprises a portion of the Tethysides orogenic belt. The project will enhance international collaborations between scientists in the U.S. and in Turkey. It will involve a recent PhD (Zhu), as well as collaboration with and training of a female seismologist from Turkey.

0217493 Mitchell描述：该奖项是为了支持密苏里州圣刘易斯的圣刘易斯大学地球和大气科学系的Brian Mitchell博士和Lupei Zhu博士以及土耳其伊兹密尔的Dokuz Eylul大学地球物理工程系的Nihal Akyol博士的联合研究项目。 他们计划利用高频（2赫兹）和宽带地震仪组对土耳其西部进行地震学研究。 他们计划利用高频线性阵列的数据，通过使用地震接收函数和朱博士最近开发的叠加程序，获得地堑和下伏岩石的二维结构模型。他们将使用当地地震的线性阵列和区域阵列记录，对精确的事件位置和该地区的层析成像速度模型进行联合反演，并将使用宽带仪器的数据进行其他几项研究。 本项目的目标是获得该区域的速度结构模型，包括可能的各向异性，以确定在不同地点以不同方法获得的地壳/上地幔各向异性模型之间的一致或不一致程度，从这些模型推断地幔流动的方向和一致性以及地壳应力场的方向，并确定在复杂构造和构造区域获取各向异性构造信息的最佳方法。范围：本研究所选地点特别适合进行拟议研究。土耳其西部是世界上地震最活跃的大陆地区之一，其中大部分地区正在经历广泛的南北伸展变形。由于该地区经历了大量的低至中等地震，因此特别适合对欧亚大陆地壳进行地震学研究。 该区域的高衰减值归因于充满流体的裂缝，这往往导致地壳各向异性。 该项目将有助于更好地了解西安纳托利亚的构造，该地区是特提斯造山带的一部分。 该项目将加强美国和土耳其科学家之间的国际合作。它将涉及最近的博士学位（朱），以及与土耳其的一名女性地震学家合作和培训。