Results 61 to 70 of about 29,724 (300)

The effects of the overriding plate thermal state on the slab dip in an ocean-continent subduction system [PDF]

Comptes Rendus Geoscience, Volume 343, pp. 323-330, 2011, 2011
To evaluate the effects of variations in the thermal state of the overriding plate on the slab dip in an ocean-continent subduction system, a 2-D finite element thermo-mechanical model was implemented. The lithosphere base was located at the depth of the 1600 K isotherm.
arxiv   +1 more source

Nature, origin and significance of a clayey cave deposit: Relationship between karst and Oligocene/Miocene tephra (NW Dinarides)

The Depositional Record, EarlyView.
A limestone cave in the NW Dinarides exhibits an anomalous presence of montmorillonite clay, not commonly found in surrounding caves, posing questions about its origin and age. Analysis reveals a composition similar to weathered tephra from the Smrekovec Volcanic Complex, suggesting transport by north‐east winds.
Nadja Zupan Hajna, Pavel Bosák, Andrej Mihevc, Michał Banaś, Jiří Filip, Lukáš Krmíček, Lenka Lisá, Šárka Matoušková, Jan Rohovec, Roman Skála, Jiří Sláma, Martin Šťastný, Jaromír Ulrych   +12 more
wiley   +1 more source

Seafloor geodetic constraints on interplate coupling of the Nankai Trough megathrust zone [PDF]

(2016) Nature, 534, 374-377, 2018
Interplate megathrust earthquakes have inflicted catastrophic damage on human society. An extremely hazardous megathrust earthquake is predicted to occur along the Nankai Trough off southwestern Japan, an economically active and densely populated area with historical records of megathrust earthquakes.
arxiv   +1 more source

Seismic performance of concrete tunnel–sand–pile interaction by the shake table test

Deep Underground Science and Engineering, EarlyView.
This research presents the square root sum of squares response of displacements and tunnel moments under the Kobe and Loma Prieta seismic excitations with a peak ground acceleration of 0.05 g for various dry relative densities of local sand in Bangladesh.
Md. Foisal Haque, Mehedi A. Ansary
wiley   +1 more source

Petrogenetic and geochemical characteristics of some auriferous granitoids in the Kumasi Basin, Ghana: Implications for geodynamic settings and controls of orogenic gold mineralization in the Edikan Gold Mine

Deep Underground Science and Engineering, EarlyView.
The Fobinso granitoids are granodiorites, while the Esuajah granitoids are granites based on their mineralogical composition. The granitoids are generally enriched in LILE and LREE than HFSE, MREE, and HREE, indicating mixing with crustal sources during their evolution.
Emmanuel D. Sunkari, Obed Oppong, Theophilus K. Agbenyezi   +2 more
wiley   +1 more source

Deep fault sliding rates for Ka-Ping block of Xinjiang based on repeating earthquakes

Open Geosciences
The seismically active Ka-Ping Block within Xinjiang, China, represents a zone of potential earthquake hazards, and existing surface measurements cannot fully reflect the area’s sub-surface slip rates.
Gao Chaojun, Liu Daiqin, Li Jie, Song Chunyan, Yideresi Gulizinati, Yushan Ailixiati   +5 more
doaj   +1 more source

Petrografi dan Geokimia Unsur Utama Granitoid Pulau Bangka: Kajian Awal Tektonomagmatisme

Eksplorium: Buletin Pusat Pengembangan Bahan Galian Nuklir, 2013
Bangka Island is composed by Klabat Granite and its granitoid variations. This study aims to investigate the characteristics of granitoid Bangka Island to be applied in the study of magmatism, tectonic situations and relationships developed in granitoid ...
Kurnia Setiawan Widana
doaj   +1 more source

Geological Screening for CO2 Storage in Deep Saline Aquifers in the Lower Mainland British Columbia (LMBC), Canada

Greenhouse Gases: Science and Technology, EarlyView.
ABSTRACT Deep saline aquifers and depleted reservoirs are prime candidates for CO2 storage, but feasibility assessments remain limited in regions with little oil and gas activity, such as the Lower Mainland of British Columbia (LMBC), Canada. This study evaluates the CO2 storage potential of the Georgia Basin strata beneath the LMBC, focusing on three ...
Maziyar Nazemi, Shahin E. Dashtgard, Francyne Bochi do Amarante, Hassan Hassanzadeh, Andrew D. La Croix   +4 more
wiley   +1 more source

Contrasting magma chemistry in the Candelaria IOCG district caused by changing tectonic regimes

Scientific Reports
Iron oxide-copper-gold (IOCG) deposits are a vital source of copper and critical elements for emerging clean technologies. Andean-type IOCG deposits form in continental arcs undergoing extension, and they have a temporal relationship with magmatism ...
R. Romero, F. Barra, M. Reich, A. Ojeda, M. J. Tapia, I. del Real, A. Simon   +6 more
doaj   +1 more source

Rigorous statistical detection and characterization of a deviation from the Gutenberg-Richter distribution above magnitude 8 in subduction zones [PDF]

Pure and Applied Geophysics 161 (4), 839-864 (2004), 2002
We present a quantitative statistical test for the presence of a crossover c0 in the Gutenberg-Richter distribution of earthquake seismic moments, separating the usual power law regime for seismic moments less than c0 from another faster decaying regime beyond c0. Our method is based on the transformation of the ordered sample of seismic moments into a
arxiv   +1 more source