Results 71 to 80 of about 7,754 (208)

Characterizing the Forearc Basement and Subducting Structures of the Northern Ecuadorian Margin

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract We present 2D P‐wave velocity (Vp) models from the northern Ecuadorian subduction zone, north of the Carnegie Ridge. Data were collected during the HIPER2 3D wide‐angle seismic experiment, both onshore and offshore. Key seismic profiles were manually picked to determine P‐wave first‐arrival times, which were used for a traveltime tomographic ...
Arnaud Delsuc, Audrey Galve, Mireille Laigle, Andreas Rietbrock, Laure Schenini, Hans Agurto‐Detzel, Alexandra Skrubej, Boris Marcaillou, Sandro Vaca, Annika Maier, Michele Paulatto   +10 more
wiley   +1 more source

Melting of old refractory mantle during subduction initiation of the western Pacific plate

Communications Earth & Environment
The source characteristics and melting mechanisms for forearc basalts formed during subduction initiation in the western Pacific plate remain unclear.
Hong-Yan Li, Chun Yang, Marguerite Godard, Jeffrey G. Ryan, Yi-Gang Xu   +4 more
doaj   +1 more source

Inner forearc faults in northern Cascadia do not accommodate elastic strain driven by the megathrust seismic cycle

Seismica
We employ numerical models to explore the connection between subduction zone coupling or megathrust rupture and upper plate faults in the northern Cascadia forearc.
Nicolas Harrichhausen, Kristin D Morell, Christine Regalla   +2 more
doaj   +1 more source

Building the Andean Crust at ∼35°S: Arc Geochemistry Reveals Cretaceous Thinning and Rapid Neogene Thickening

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract Quantification of the timing and mechanisms of crustal thickening in Cordilleran orogenic hinterlands remains challenging. We address this in the Andes using whole‐rock geochemistry and zircon petrochronology from a >70 Myr volcanic record in the Tinguiririca valley of Chile (∼35° ${}^{\circ}$S), which captures a pivotal transition from ...
Chance B. Ronemus, Caden J. Howlett, Peter G. DeCelles, Barbara Carrapa, Andrés Echaurren, Matías Barrionuevo, Jesse G. Mosolf, Michelle L. Foley, Mihai N. Ducea   +8 more
wiley   +1 more source

Thermal and Structural Signatures Associated With Subducted Seamounts in Hyuga‐nada and Off Cape Muroto, Southwest Japan

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract We present heat flow estimates beneath the forearc slopes off Hyuga‐nada and Cape Muroto in the Nankai Trough, where the Philippine Sea plate subducts beneath the southwestern Japan. Using seismic reflection data, we identified Bottom Simulating Reflectors and derived heat flow ranging from 20 to >140 mW/m2.
Masataka Kinoshita, Kazuya Shiraishi, Yoshitaka Hashimoto, Yohei Hamada, Rie Nakata   +4 more
wiley   +1 more source

A new look at the geodynamic development of the Ediacaran–early Cambrian forearc basalts of the Tannuola-Khamsara Island Arc (Central Asia, Russia): Conclusions from geological, geochemical, and Nd-isotope data

Open Geosciences
Oceanic igneous rocks throughout the Altai-Sayan Fold Belt (ASFB) in central-southern Siberia are often considered to be late Precambrian–early Paleozoic accreted elements of oceanic crust – often of uncertain paleogeographic or geodynamic origin.
Mongush Andrey Alexandrovich, Olschewski Pascal   +1 more
doaj   +1 more source

Detailed plate boundary structure off northeast Japan coast

Geophysical Research Letters, 2000
In 1997, a seismic experiment using an airgun array and ocean bottom seismographs (OBSs) was performed in the forearc region of the northeast Japan (NEJ) arc.
Narumi Takahashi, Shuichi Kodaira, Tetsuro Tsuru, JinOh Park, Yoshiyuki Kaneda, Hajimu Kinoshita, Shintaro Abe, Minoru Nishino, Ryota Hino   +8 more
doaj   +1 more source

Interseismic Strain Accumulation and Partitioning in Hispaniola From GNSS and InSAR

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract We combine GNSS and InSAR observations to constrain the spatial distribution of strain across the northeastern Caribbean plate boundary, focusing on Hispaniola, to investigate strain partitioning and fault slip rates in an actively deforming tectonic setting with significant seismic hazard.
Christian Emmanuel, Eric Calais, Romain Jolivet, Bryan Raimbault, Steeve J. Symithe, Dominique Boisson   +5 more
wiley   +1 more source

The early Pliocene Titiokura Formation: stratigraphy of a thick, mixed carbonate-siliciclastic shelf succession in Hawke's Bay Basin, New Zealand [PDF]

, 2004
This paper presents a systematic stratigraphic description of the architecture of the early Pliocene Titiokura Formation (emended) in the Te Waka and Maungaharuru Ranges of western Hawke's Bay, and presents a facies, sequence stratigraphic, and ...
Nelson, Campbell S., Graafhuis, Rhys B., Caron, Vincent, Campbell S. Nelson, Pallentin, Arne, Kamp, Peter J.J., Kyle J. Bland, Peter J. J. Kamp, Rhys Graafhuis, Bland, Kyle J., Arne Pallentin, Vincent Caron   +11 more
core   +1 more source

Preserved Through Hyperaridity, 150 Million Years of Exhumation and Strike‐Slip Deformation in the Atacama Coastal Cordillera

Tectonics, Volume 45, Issue 9, September 2026.
Abstract The Coastal Cordillera of northern Chile, in the forearc of the Andean subduction zone, provides an ideal site to evaluate exhumation above the oldest active subduction under extreme aridity. This range lies parallel to a sediment‐starved trench, has experienced hyperaridity since the Miocene, and is transected by the ∼1,000‐km‐long Atacama ...
T. F. Aránguiz‐Rago, A. R. Duvall, K. W. Huntington   +2 more
wiley   +1 more source