State of stress in Texas: Implications for induced seismicity
نویسندگان
چکیده
Compilation of almost 200 new maximum horizontal stress (SHmax) orientations in Texas reveals a complex intraplate stress field. A large extensional stress province is associated with extensive growth faulting from northeastern Mexico to Louisiana. SHmax is subparallel to the coastline, following the strikes of the growth faults. In contrast, we observe a strike-slip/normal faulting regime with SHmax approximately E-W in much of west Texas and the Texas Panhandle, similar to the stress fields observed in northeast NewMexico and north-central Oklahoma. Within the Fort Worth Basin in northeast Texas, SHmax is NNE-SSW. The faulting regime transitions from strike-slip/normal faulting in the northern part of the basin to normal faulting with subequal horizontal principal stress magnitudes further south. Recent sites of apparently injection-related seismicity near Snyder/Cogdell (west Texas), Karnes City/Fashing (south Texas), the Dallas-Fort Worth metroplex, and Timpson (east Texas) involves fault slip compatible with local stress fields.
منابع مشابه
Pore pressure/stress coupling and its implications for seismicity
Periodic pressure measurements made during the depletion of oil fields and virgin pressure measurements through normallyand over-pressured sequences in sedimentary basins both demonstrate that changes in pore pressure and minimum horizontal stress (σh) are coupled to one another. Pore pressure/stress coupling is predicted by poroelastic theory. Data from the North Sea (Ekofisk Field) and Texas ...
متن کاملVulnerability of Prepubertal Mice Testis to Iron Induced Oxidative Dysfunctions In Vivo and Functional Implications
Background The present study describes the susceptibility of prepubertal testis of mice to prooxidant induced oxidative impairments both under in vitro and in vivo exposure conditions. MaterialsAndMethods Following in vitro exposure to iron (5,10 and 25 M), oxidative response measured in terms of lipid peroxidation and hydroperoxide levels in testis of pre pubertal mice (4 wk) was more robust c...
متن کاملFluid‐induced seismicity: comparison of rate‐ and state‐ and critical pressure theory
Background Gaucher et al. (2015) provide an overview on published methods employed for modelling induced seismicity in geothermal reservoirs. Here I focus exclusively on the rateand state-dependent theory of Dieterich (1994), further referred to as RST for modelling fluid injection induced seismicity. For simplicity, I consider the case of fluid injection at the origin in a medium with isotropi...
متن کاملStatistical Evaluation of Induced Seismicity at the Karkheh Dam, Iran
Karkheh Dam is the largest dam in Iran with a capacity of about 7.4×109 cubic meters and height of 127 meters. Since the first impoundment, increasing in seismic activity in the dam area has been observed that indicates the possible occurrence of reservoir-induced seismicity (RIS).In the present work, a preliminary evaluation is conducted firstly in order to investigate these observations. Base...
متن کاملConsensus Molecular Subtypes of Colorectal Cancer and their Clinical Implications
The colorectal cancer (CRC) subtyping consortium has unified six independent molecular classification systems, based on gene expression data, into a single consensus system with four distinct groups, known as the consensus molecular subtypes (CMS); clinical implications are discussed in this review based on articles relevant to the CMS of CRC indexed in PubMed as well as the authors’ own ...
متن کامل