研究|Research

地震背景噪音特征与机制|Characteristics and mechanisms of seismic backgound noises

利用地震背景噪音研究大气-海洋-固体地球的耦合机制。Footprints of various atmospheric, and oceanic events on seismic records; multi-scale coupling mechanisms among atmosphere-ocean-solid Earth.

img_8791  img_8785 
img_8708 
20160828_121524

2016年8月与新疆维吾尔自治区地震局监测中心合作在温泉布设甚宽频地震台站(360秒-50Hz)和便携式气象站。
Deploying a very broad band seismic station and a portable weather station in Wenquan, collaborating with Earthquake Monitoring Center, Earthquake Administration of Xinjiang province, Aug., 2016.

20150825_093346  20150825_154919
20150825_141256  20150825_170112

2015年8月与福建省地震局泉州基准地震台合作在泉州设甚宽频地震台站(360秒-50Hz)和便携式气象站。
Deploying a very broad band seismic station and a portable weather station in Quanzhou, collaborating with Quanzhou base station, Earthquake Administration of Fujian province, Aug., 2015.

边缘海内部构造和地质演化|Deep structure and geological processes of marginal sea basins

综合不同的地震学方法(如横波分裂、体波走时层析成像等)研究边缘海的三维构造及其相应的地质演化,目前研究区域为南中国海。
Using integrated seismological techniques such as shear-wave splitting, traveltime tomography to explore the seismic structure of the marginal sea basins and understand their geological processes. Current study area is focused on South China Sea.

vietnam_scs左图:2009年在越南布设地震台站,2012年在南海布设OBS。
Left figure: Deploying stations in Vietnam in 2009 and OBS in South China Sea in 2012.

 

震源特征描述以及震源区分|Source Discription & Discrimination

震源机制反演、震源描述以及震源区分:天然地震、火山引发的地震以及爆破的震源特征。 Moment tensor inversion, source discription and discrimination: source characteristics of earthquakes,earthquakes caused by volcanos, and explosions.

****************************************************************************************************
****************************************************************************************************

国外博士期间研究题目| Research during PhD

美国西部地下三维速度模型/Western USA 3D velocity structure

美国西部地区是一个构造活跃区,在该区域,太平洋板块、北美板块和Juan de Fuca板块相互作用,地质结构复杂。我们建立这一区域的高分辨率的速度模型和各向异性结构,对地幔的对流过程提供重要的线索,从而系统地理解美国西部的演化过程,例如Juan de Fuca板块俯冲到北美板块之下、黄石地幔柱的上涌过程等等。
Western USA is a tectonically active region involving comlicated interactions among different geologica provinces. We want to understand its evolution as a whole system. We have been building high resolution velocity models beneath this region, which can therefore provide important clues to mantle convection processes, e.g., the subduction of the Juan de Fuca plate, the upwelling of the Yellowstone plume, and the delamination of the Wallowa plutonic roots, etc.

考虑有限频率的影响后的反演结果见/See the results using the finite frequency approach at:http://dna.berkeley.edu

俄勒冈地震台列远震研究/Oregon Array for Teleseismic Study

俄勒冈地处北美板块,在这里我们想研究两个问题: (1) Juan de Fuca板块从西面沿东北方向沉降于北美板块之下,该板块是否沉降延伸到俄勒冈州沉降带火山圈以东的地幔深处?(2)Newberry火山轨迹位于北美板块,该轨迹的走向与北美板块运动的方向成120度角而不平行, Newberry火山轨迹的成因到底是什么?
Oregon is located on the North American Plate and we want to study two targets here: (1) the Juan de Fuca plate is subducting beneath the North American Plate from the west. The question is however, does the Juan de Fuca slab extend down into the mantle east of the Cascade beneath Oregon? (2) the Newberry volcanic track, located on the North American Plate, orients at ~120 degrees to the plate motion. The causal mechanism of the Newberry track remains enigmatic.

冰岛地幔柱/Iceland Upwelling

冰岛地幔柱的存在以及它对邻近洋中脊Kolbeinsey和Reykjanes的影响被来自地质、地球物理学和地球化学的证据所证实。当地幔柱到达岩石圈的底层后,它的扩散方式被提出有两种可能:洋中脊平行模式和辐射模式。哪一个是正确的呢?
The existence of the Icelandic upwelling and its influence on the Kolbeinsey and Reykjanes ridges have been supported by evidence from geology, geophysics and geochemistry. Rift-parallel flow and radial flow have been suggested as two candidate dispersion patterns of upwelling material when it arrives the base of the lithosphere. Which one is appropriate?

WordPress Themes