Results 51 to 60 of about 343 (176)

Influence of Glacial Isostatic Adjustment on Intraplate Stress and Seismicity in Eastern North America in the Presence of Pre‐Existing Weak Zones

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 10, October 2025.
Abstract Eastern North America has hosted significant historical earthquakes, where seismicity clusters along tectonically inherited structures. Using the spherical finite‐element code CitcomSVE and fully 3D viscosity structure, we model the intraplate stress response to glacial isostatic adjustment (GIA) using ICE‐6G, both with and without low ...
Erin Hightower, Michael Gurnis
wiley   +1 more source

Distinct Fracture Mineralogy That is Out of Equilibrium With Modern Groundwaters Provides Important Context for Subsurface Life

Journal of Geophysical Research: Biogeosciences, Volume 130, Issue 10, October 2025.
Abstract Rock fracture surfaces in the crust are essential habitat for microorganisms. Fracture‐groundwater interfaces provide physical substrates for biofilm growth and are sources of carbon, nutrients, and electron donors and acceptors. To better understand geochemical processes impacting fracture surfaces and the subsurface microbiome, we identified
Christopher J. Schuler, Sarah L. Nicholas, Ryan Tappero, Dean M. Peterson, Cara M. Santelli, Brandy M. Toner   +5 more
wiley   +1 more source

How to deal with sparse macroseismic data: Reflections on earthquake records and recollections in the Eastern Baltic Shield

Annals of Geophysics, 2011
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Tatiana N. Tatevossian, Ruben E. Tatevossian, Päivi Mäntyniemi   +2 more
doaj   +1 more source

Formation mechanism of the Vaasa Batholith in the Fennoscandian shield: Petrographic and geochemical constraints [PDF]

Bulletin of the Geological Society of Finland, 2012
The ~1.88 Ga Vaasa Batholith in western Finland is a large granitoid area (8 000 km2) with gradational contacts against the garnet- and cordierite-bearing diatexite and metatexite migmatites of the Pohjanmaa Belt.
H. Mäkitie, P. Sipilä, H. Kujala, A. Lindberg, A. Kotilainen   +4 more
doaj   +1 more source

De Geer moraine internal architecture based on sedimentological and geophysical investigations and implications for ice‐marginal reconstructions

Boreas, Volume 54, Issue 4, Page 687-710, October 2025.
De Geer moraines may act as valuable ice‐marginal indicators; however, to date, their variable mode of formation has presented challenges for this utility. Here, we present sedimentological and ground penetrating radar data of DGMs located in southwest Finland.
Gwyneth E. Rivers, Robert D. Storrar, Antti E. K. Ojala, Joni Mäkinen, Camilla Holmroos, Naomi Holmes   +5 more
wiley   +1 more source

Using a titanium-in-quartz geothermometer for crystallization temperature estimation of the Palaeoproterozoic Suursaari quartz porphyry [PDF]

Estonian Journal of Earth Sciences, 2012
The Suursaari volcanic sequence represents volcanic activity related to Wiborg Batholith rapakivi intrusions in the southern part of the Fennoscandian Shield. The estimated pressure conditions for batholith granitic rocks are 1–5 kbar and crystallization
Kairi Ehrlich, Evelin Verš, Juho Kirs, Alvar Soesoo   +3 more
doaj   +1 more source

Use of LiDAR to derive a new model of glacial hydro‐dynamic events shaping southern Ontario landscapes, Canada

Boreas, Volume 54, Issue 4, Page 590-624, October 2025.
High‐resolution LiDAR data with field validation of inferred southern Ontario ice stream terrains indicate that steady‐state ice streaming is difficult to reconcile with our observations. Rather, these new observations show strong evidence of significant fluvial scouring across the area in which meltwater sheet flow overtopped the landscape.
David R. Sharpe, Chris C. Smart
wiley   +1 more source

CH4‐He‐H2‐Rich Fluids Associated With the Intrusive Rocks of the Mid‐Continent Rift System in Minnesota (USA)

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 9, September 2025.
Abstract Several studies have shown that H2 and CH4 emissions are recorded within Precambrian areas, where the origin of gases has yet to be determined. The Mid‐Continent Rift (MCR) is an aborted rift aged from 1.1 Ga and composed of volcanic and (ultra)‐mafic rocks.
V. Combaudon, O. Sissmann, J. Guélard, S. Noirez, H. Derluyn, E. Deville   +5 more
wiley   +1 more source

Lithosphere-asthenosphere system in shield areas of North America and Europe

Annals of Geophysics, 1997
In previous papers surface dispersion data have been combined with the results of deep seismic refraction data to derive a regionalization of the lithosphere-asthenosphere system and to investigate the presence of significant heterogeneity down to depths
P. Pierri, V. Del Gaudio, G. Calcagnile
doaj   +1 more source

From Hydrocarbon to CO2 Storage: Unveiling the Potential of the Miocene Lille John Member in the Danish North Sea

Basin Research, Volume 37, Issue 5, September–October 2025.
Depositional evolution of the upper Miocene complex. ABSTRACT To achieve net‐zero carbon emissions by 2050, gigatonnes of CO2 must be captured and stored in the subsurface. Screening and exploration of prospective storage sites have thus gained momentum in recent years.
Zeenat Maniar, Florian Smit, Erik Skovbjerg Rasmussen, Kresten Anderskouv, Kenneth Bredesen, Lars Nielsen   +5 more
wiley   +1 more source