Results 71 to 80 of about 61,955 (243)

Discovery and Fine‐Scale Mapping of Hadal Xenophyophore Habitat in the Nova Canton Trough, Central Pacific Ocean

Remote Sensing in Ecology and Conservation, EarlyView.
Discovery and fine‐scale mapping of a hadal xenophyophore field: submersible video transects and photogrammetry enable semi‐automated delineation of xenophyophores, revealing their abundance, spatial organisation, structural complexity and contribution to habitat heterogeneity at ~8000 m depth.
Denise J. B. Swanborn, Joana Gafeira, Megan Cundy, Daniel C. Bates, Heather A. Stewart, Alan J. Jamieson   +5 more
wiley   +1 more source

Horizontal mantle flow controls subduction dynamics

Scientific Reports, 2017
It is generally accepted that subduction is driven by downgoing-plate negative buoyancy. Yet plate age –the main control on buoyancy– exhibits little correlation with most of the present-day subduction velocities and slab dips. “West”-directed subduction
E. Ficini, L. Dal Zilio, C. Doglioni, T. V. Gerya   +3 more
doaj   +1 more source

Subduction termination through progressive slab deformation across Eastern Mediterranean subduction zones from updated P-wave tomography beneath Anatolia [PDF]

, 2018
Using finite-frequency teleseismic P-wave tomography, we developed a new three-dimensional (3-D) velocity model of the mantle beneath Anatolia down to 900 km depth that reveals the structure and behavior of the sub-ducting African lithosphere beneath ...
Susan L. Beck, Özacar, A. Arda, Jonathan R. Delph, Portner, Daniel Evan, Niyazi Türkelli, George Zandt, A. Arda Özacar, Eric Sandvol, Sandvol, Eric, C. Berk Biryol, Delph, Jonathan R., Beck, Susan L., Özacar, Atilla Arda, Zandt, George, Daniel Evan Portner, Biryol, C. Berk, Türkelli, Niyazi   +16 more
core   +1 more source

Response of Remote Tropical West Pacific Islands to Climate Variability: A Multiproxy Record From T‐Lake, Palau, Spanning the Early Holocene to Present

Archaeometry, EarlyView.
ABSTRACT Lake sediments are natural archives of past environmental dynamics and how these systems have responded to past climate variability. Sediment geochemistry, governed by local geology and climate processes, is unique to each lake‐catchment and geochemical proxies must be validated for each study site.
Jalene Nalbant, Larissa Schneider, Jessica L. Blois, Matthew Wolhowe, Julian P. Sachs, Simon G. Haberle, Geoffrey Clark   +6 more
wiley   +1 more source

Depositional processes of varved sediments from proglacial Lago Frías since 1800 CE (North Patagonian Andes, Argentina)

Boreas, EarlyView.
The glacierized Valle Frías in Northern Patagonia is one of the best‐studied valleys in South America and includes varved sediments from Lago Frías. We complement this lacustrine record with a high‐resolution documentation of varve counts and their composition.
Bernd Zolitschka, Philipp Böning, A. Catalina Gebhardt, M. Alicia Irurzun, Wojciech Tylmann, Christoph Vogt, Claudia S. G. Gogorza   +6 more
wiley   +1 more source

Reawakening of large earthquakes in south central Chile: The 2016 Mw 7.6 Chiloé event

Geophysical Research Letters, 2017
On 25 December 2016, the Mw 7.6 Chiloé earthquake broke a plate boundary asperity in south central Chile near the center of the rupture zone of the Mw 9.5 Valdivia earthquake of 1960. To gain insight on decadal‐scale deformation trends and their relation
S. Ruiz, M. Moreno, D. Melnick, F. delCampo, P. Poli, J. C. Baez, F. Leyton, R. Madariaga   +7 more
doaj   +1 more source

Early development of anoxia prior to the main euxinic phase of the Jenkyns Event on the margin of the Western Tethys (Sachrang Basin, Eastern Alps)

Sedimentology, EarlyView.
ABSTRACT Although the global expansion of oxygen‐depleted marine environments during the Early Toarcian Jenkyns Event (or Toarcian Oceanic Anoxic Event) is primarily inferred from successions in the NW European epicontinental basins, the timing of the expansion of anoxia in Tethyan basins, where hydrography potentially played a minor role, is poorly ...
Tamás Müller, Stefan Neumeister, Jan Schlögl, Emanuela Mattioli, Hans‐Jürgen Gawlick, Thomas J. Algeo, Adam Tomašových   +6 more
wiley   +1 more source

Plate coupling and strain in the far western Aleutian arc modeled from GPS data

Geophysical Research Letters, 2017
The Aleutian and Kuril‐Kamchatka arcs meet at a triple junction of the Pacific (PAC), Bering (BER), and North American (NAM) plates. We invert GPS observations from the westernmost Aleutian (Komandorsky) Islands and Kamchatka for the fault locking depth ...
Mikhail G. Kogan, Dmitry I. Frolov, Nikolay F. Vasilenko, Jeffrey T. Freymueller, Grigory M. Steblov, Göran Ekström, Nikolay N. Titkov, Alexandr S. Prytkov   +7 more
doaj   +1 more source

Evolution of tear faults in subduction zones: an analogue modelling perspective [PDF]

, 2020
Tear faults are common structures in subduction zones, especially at slab edges, where they origin from differential forces applied to a subducting slab in areas close to the trench.
Basili, Roberto, Tiberti, Mara Monica, Bertone, Nicolò, Del Ben, Anna, Bonini, Lorenzo, Maesano, Francesco Emanuele, Pini, Gian Andrea   +6 more
core   +1 more source

Fault‐Controlled Permeability: A Key Parameter in Geothermal Electricity Production Assessment

Terra Nova, EarlyView.
ABSTRACT Geothermal energy is central to the global green energy transition, but its development has long focused on regions with positive thermal anomalies. Through a semi‐quantitative global‐scale review and spatial analysis of 361 geothermal sites, we show that 56.2% of global geothermal electricity production occurs in regions with thermal ...
Vincent Roche, Gaétan Milesi
wiley   +1 more source