Results 101 to 110 of about 523,525 (211)

Dislocation creep may control bridgmanite deformation in the Earth’s lower mantle

Communications Earth & Environment
Seismic anisotropy in the Earth’s lower mantle, particularly around subduction zones, is commonly attributed to deformation by dislocation creep, yet much of the lower mantle appears nearly isotropic.
Longli Guan, Daisuke Yamazaki, Noriyoshi Tsujino, Yuji Higo, Sho Kakizawa, Xiang Wu, Junfeng Zhang   +6 more
doaj   +1 more source

Seismic anisotropy reveals crustal flow driven by mantle vertical loading in the Pacific NW. [PDF]

Sci Adv, 2020
Castellanos JC, Perry-Houts J, Clayton RW, Kim Y, Stanciu AC, Niday B, Humphreys E.   +6 more
europepmc   +1 more source

Borehole seismic methods for opencast coal exploration [PDF]

, 1990
Surface seismic techniques lack the resolution to image the top 100m or so of the earth's surface necessary for opencast coal exploration. The work reported in this thesis is the development of borehole seismic methods making use of the closely spaced ...
Kragh, J. Edward
core  

Shear-wave attenuation anisotropy: a new constraint on mantle melt near the Main Ethiopian Rift

Seismica
The behaviour of fluids in preferentially aligned fractures plays an important role in a range of dynamic processes within the Earth. In the near-surface, understanding systems of fluid-filled fractures is crucial for applications such as geothermal ...
Joseph Asplet, James Wookey, Micheal Kendall, Mark Chapman, Ritima Das   +4 more
doaj   +1 more source

The isotropic and anisotropic passive seismic tomography for mineral exploration: a case study of Dongchuan copper deposit, China

Geomechanics and Geophysics for Geo-Energy and Geo-Resources
Conventional metallic mineral exploration has primarily relied on potential field and electromagnetic methods, while reflection-based seismic methods have seen limited application in this field.
Xiuping Qi, Zhikun Liu, Yuqian Guo, Xinyang He, Liang Tuo, Jinli Huang   +5 more
doaj   +1 more source

One-dimensional physical reference models for the upper mantle and transition zone: combining seismic and mineral physics constraints [PDF]

One-dimensional seismic reference models are known to be a nonunique solution to global seismic data, hampering an interpretation in terms of physical structure. Here we test the compatibility of the simplest hypothesis of a mantle convecting as a whole,
Giardini, D., Deuss, A., Cammarano, F., Goes, S.   +3 more
core   +1 more source

Meltwater Orientations Modify Seismic Anisotropy in Temperate Ice

Geophysical Research Letters
Seismology is increasingly used to infer the magnitude and direction of glacial ice flow. However, the effects of interstitial meltwater on seismic properties remain poorly constrained.
Cassandra Seltzer, Maria‐Gema Llorens, Andrew J. Cross   +2 more
doaj   +1 more source

High temperature elastic anisotropy of the perovskite and post-perovskite polymorphs of Al2O3 [PDF]

, 2005
Finite temperature ab initio molecular dynamics calculations were performed to determine the high temperature elastic and seismic properties of the perovskite and post-perovskite phases of pure end-member Al2O3.
Price, GD, Brodholt, JP, Stackhouse, S
core  

The seismic response to Faroe basalts from integrated borehole and wide-angle seismic data [PDF]

We study the seismic response of layered basalts in the Faroe Islands using borehole data and vertical seismic profiles from the Vestmanna borehole, combined with reflection and wideangle seismic data recorded into arrays of both borehole and land ...
Worthington, M. H., Andersen, M. S., White, R. S., Group, Seifaba, Bais, G.   +4 more
core  

Seismic anisotropy of the D″ layer induced by (001) deformation of post-perovskite. [PDF]

Nat Commun, 2017
Wu X, Lin JF, Kaercher P, Mao Z, Liu J, Wenk HR, Prakapenka VB.   +6 more
europepmc   +1 more source