气候变化领域集成服务门户(CCPortal): A 3D Full Stress Tensor Model for Oklahoma

CCPortal

DOI	10.1029/2020JB021113
	A 3D Full Stress Tensor Model for Oklahoma
	Chai C.; Delorey A.A.; Maceira M.; Levandowski W.; Guyer R.A.; Zhang H.; Coblentz D.; Johnson P.A.
发表日期	2021
ISSN	21699313
卷号	126 期号:4
英文摘要	The stress tensor is an important property for upper crustal studies such as those that involve pore fluids and earthquake hazards. At tectonic plate scale, plate boundary forces and mantle convection are the primary drivers of the stress field. In many local settings (10–100 s of km and <10 km depth) in tectonic plate interiors, we can simplify by assuming a constant background stress field that is perturbed by local heterogeneity in density and elasticity. Local stress orientation and sometimes magnitude can be estimated from earthquake and borehole-based observations when available. Modeling of the local stress field often involves interpolating sparse observations. We present a new method to estimate the 3D stress field in the upper crust and demonstrate it for Oklahoma. We created a 3D material model by inverting multiple types of geophysical observations simultaneously. Integrating surface-wave dispersion, local travel times and gravity observations produces a model of P-wave velocity, S-wave velocity, and density. The stress field can then be modeled using finite element simulations. The simulations are performed using our simplified view of the local stress field as the sum of a constant background stress field that is perturbed by local density and elasticity heterogeneity and gravitational body forces. An orientation of N82°E, for the maximum compressive tectonic force, best agrees with previously observed stress orientations and faulting types in Oklahoma. The gravitational contribution of the horizontal stress field has a magnitude comparable to the tectonic contribution for the upper 5 km of the subsurface. © 2021. Oak Ridge National Laboratory, Managed by UT-Battelle, LLC. Journal of Geophysical Research: Solid Earth published by Wiley Periodicals LLC on behalf of American Geophysical Union.
英文关键词	gravity; joint inversion; Oklahoma; stress model; surface-wave dispersion; travel times
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187239
作者单位	Oak Ridge National Laboratory, Oak Ridge, TN, United States; Los Alamos National Laboratory, Los Alamos, NM, United States; Department of Physics and Astronomy, University of Tennessee, Knoxville, TN, United States; TetraTech, Inc., Superior, CO, United States; School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, China
推荐引用方式 GB/T 7714	Chai C.,Delorey A.A.,Maceira M.,et al. A 3D Full Stress Tensor Model for Oklahoma[J],2021,126(4).
APA	Chai C..,Delorey A.A..,Maceira M..,Levandowski W..,Guyer R.A..,...&Johnson P.A..(2021).A 3D Full Stress Tensor Model for Oklahoma.Journal of Geophysical Research: Solid Earth,126(4).
MLA	Chai C.,et al."A 3D Full Stress Tensor Model for Oklahoma".Journal of Geophysical Research: Solid Earth 126.4(2021).