气候变化领域集成服务门户(CCPortal): Mechanical strength and physical properties of Oklahoma's igneous basement

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DOI	10.1016/j.tecto.2020.228336
	Mechanical strength and physical properties of Oklahoma's igneous basement
	Kibikas W.M.; Carpenter B.M.; Ghassemi A.
发表日期	2020
ISSN	00401951
卷号	777
英文摘要	From 2009 to 2016, a drastic increase in seismic activity occurred in the Central and Eastern US (CEUS), particularly in the Oklahoma-Kansas region. The majority of hypocenters were focused in the crystalline basement rock. Information regarding the physical properties (elastic wave velocity, peak strength, etc.) of rocks in the CEUS basement to date is sparse. Forecasting future seismic hazard and predicting the in situ response of the crystalline basement requires their geomechanical parameters be adequately constrained. This work assesses the mechanical and petrophysical properties of several sets of basement rocks from Oklahoma to provide a better framework for understanding intraplate seismicity and overall basement deformation in the continental United States. Laboratory experiments were conducted with granite, rhyolite and diabase basement rock samples collected from southern Oklahoma. Evolution of compressional and shear wave velocity with increasing confinement was measured through a series of ultrasonic velocity tests. A suite of uniaxial and triaxial tests were conducted to measure the elastic and inelastic deformation behavior of the basement rocks. Deformation data was evaluated using the Mohr-Coulomb criterion and compared with additional preexisting deformation data of igneous basement rocks. Dynamic and static elastic properties compare favorably with available field measurements and demonstrate the role physical properties can play in varying mechanical behavior. Granitic samples demonstrate moderate variation of intrinsic physical properties can alter elastic properties and failure behavior significantly. Water-weakening in the basement rocks may indicate fluid-assisted processes such as stress corrosion cracking enhance deformation in the crystalline basement. © 2020 Elsevier B.V.
关键词	Central United States Crystalline basement Intraplate seismicity Mechanical strength Petrophysical properties
英文关键词	Acoustic wave velocity; Deformation; Elasticity; Granite; Petrophysics; Physical properties; Rock mechanics; Seismology; Shear flow; Shear waves; Strength of materials; Stress corrosion cracking; Ultrasonic testing; Wave propagation; Central United States; Crystalline basement; Elastic wave velocity; Intraplate seismicity; Laboratory experiments; Mohr coulomb criterion; Petrophysical properties; Ultrasonic velocity tests; Buildings; basement rock; crystalline rock; deformation; igneous rock; intraplate process; physical property; physicochemical property; seismicity; strength; Kansas; Oklahoma [United States]; United States
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207788
作者单位	School of Geosciences, University of Oklahoma, 100 E. Boyd St., Norman, OK 73019, United States; Mewbourne School of Petroleum and Geological Engineering, University of Oklahoma, 100 E. Boyd St., Norman, OK 73019, United States
推荐引用方式 GB/T 7714	Kibikas W.M.,Carpenter B.M.,Ghassemi A.. Mechanical strength and physical properties of Oklahoma's igneous basement[J],2020,777.
APA	Kibikas W.M.,Carpenter B.M.,&Ghassemi A..(2020).Mechanical strength and physical properties of Oklahoma's igneous basement.Tectonophysics,777.
MLA	Kibikas W.M.,et al."Mechanical strength and physical properties of Oklahoma's igneous basement".Tectonophysics 777(2020).