Results 61 to 70 of about 20,365 (298)

Papua New Guinea Moho inversion based on XGM 2019e gravity field model

Frontiers in Earth Science, 2023
The construction of the high-resolution Moho depth model is significant for studying the characteristics of the complex tectonic movement (seafloor spreading, plate subduction phenomena) in Papua New Guinea.
Yijun Liu, Guangliang Yang, Guangliang Yang, Jie Zhang, Bingjie Zhao   +4 more
doaj   +1 more source

The Holocene sedimentary record of Mittie Glacier dynamics in Smith Bay, Ellesmere Island (eastern Canadian Arctic Archipelago)

Journal of Quaternary Science, EarlyView.
ABSTRACT The physical, sedimentological, mineralogical, and elemental geochemical properties of sediment cores collected in Smith Bay (22BC and 01PC), and near the front of Mittie Glacier (23BC and 01GC), were used to reconstruct glacial sediment discharge and trace the long‐term composition and provenance of detrital sediments for the northeastern ...
Elodie Bracquart, Jean‐Carlos Montero‐Serrano, Patrick Lajeunesse, Guillaume St‐Onge, Luke Copland   +4 more
wiley   +1 more source

Constraining South Atlantic growth with seafloor spreading data [PDF]

Tectonics, 2014
Recent models of South Atlantic opening history focus on early plate divergence by incorporating intracontinental deformation, which is poorly constrained. Aiming to avoid the uncertainties in this approach, we model the entire divergence history with a joint inversion for seafloor spreading data.
Pérez-Díaz, Lucía, Eagles, Graeme
openaire   +4 more sources

The essential role of large research vessels in marine ecosystem observations and ocean sustainability

Limnology and Oceanography, EarlyView.
Abstract Our understanding of marine ecosystems and ability to manage them sustainably has come from multidisciplinary observations made repeatedly over long periods of time. These long‐term ecosystem observations depend on the capabilities of large research vessels, which play an essential role in the collection of global ocean observations.
Erin V. Satterthwaite, John C. Field, Andrea J. Fassbender, Gerardo Aceves‐Medina, Steven J. Bograd, Elliott L. Hazen, Nastassia V. Patin, Zachary Gold, Katherine A. Barbeau, Danie Kinkade, Adam Shepherd, Rasmus Swalethorp, Andrew R. Thompson, Henry A. Ruhl, Brice Semmens   +14 more
wiley   +1 more source

The Evolution of Seafloor Spreading Behind the Tip of the Westward Propagating Cocos‐Nazca Spreading Center

Geochemistry, Geophysics, Geosystems, 2020
At the Galapagos triple junction in the equatorial Pacific Ocean, the Cocos‐Nazca spreading center does not meet the East Pacific Rise (EPR) but, instead, rifts into 0.4 Myr‐old lithosphere on the EPR flank.
Deborah K. Smith, Hans Schouten, Ross Parnell‐Turner, Emily M. Klein, Johnson Cann, Charles Dunham, Gabriella Alodia, Iker Blasco, Benjamin Wernette, Dominik Zawadzki, Elvira Latypova, Sara Afshar, Scott Curry   +12 more
doaj   +1 more source

Revisiting the silicon isotopic signal of sponge skeletons and its implications

Limnology and Oceanography, EarlyView.
Abstract This study investigates the relationship between the silicon (Si) isotopic composition of sponge skeletal silica (δ30SibSi) and seawater characteristics in sponge habitats, specifically the concentration of dissolved silicic acid and its Si isotopic signature (δ30SidSi).
Manuel Maldonado, Katharine R. Hendry
wiley   +1 more source

Volcanic evolution of an ultraslow-spreading ridge

Nature Communications, 2023
Nearly 30% of ocean crust forms at mid-ocean ridges where the spreading rate is less than 20 mm per year. According to the seafloor spreading paradigm, oceanic crust forms along a narrow axial zone and is transported away from the rift valley.
H. H. Stubseid, A. Bjerga, H. Haflidason, L. E. R. Pedersen, R. B. Pedersen   +4 more
doaj   +1 more source

Deep lithospheric structures along the southern central Chile Margin from wide-angle P-wave modellilng [PDF]

, 2009
Crustal- and upper-mantle structures of the subduction zone in south central Chile, between 42 degrees S and 46 degrees S, are determined from seismic wide-angle reflection and refraction data, using the seismic ray tracing method to calculate minimum ...
A. Krabbenhoeft, Angermann, Bangs, Barrientos, Behrmann, Behrmann, Bialas, Bourgois, Brasse, Bry, C. J. Petersen, C. Papenberg, Cande, Cifuentes, Cisternas, Contreras-Reyes, Contreras-Reyes, Contreras-Reyes, Currie, DeMets, E. Contreras-Reyes, E. R. Flueh, Farr, Fischer, Flueh, Flueh, Gonzalez, Grevemeyer, Grevemeyer, Grevemeyer, Gross, Haberland, Hackney, Heesemann, Hyndman, I. Grevemeyer, Ivandic, Kapinos, Kirby, Krawczyk, Lange, Lefeldt, M. Scherwath, Melnick, Melnick, Mordohovich, Oleskevich, R. W. Weinrebe, Ranero, Ranero, Ranero, Ranero, Rietbrock, Roeser, Scherwath, Scholl, Song, Stein, Takahashi, Tassara, Taylor, Tebbens, Thierer, Tilmann, Voelker, Voelker, von Huene, Wessel, White, Yanez, Zelt, Zelt, Zelt, Zelt   +73 more
core   +1 more source

Oblique seafloor spreading across intermediate and superfast spreading centers

Earth and Planetary Science Letters, 2018
Abstract We show that oblique seafloor spreading occurs in several regions where obliquity, α, was not recognized before. These include the slow spreading centers of the Red Sea ( α ≈ 20 ° ), intermediate spreading centers of the Cocos–Nazca plate boundary between 91°W and 94°W ( α ≈ 9 ° ), and superfast spreading centers of the East ...
Tuo Zhang, Richard G. Gordon, Chengzu Wang   +2 more
openaire   +3 more sources

Sources of marine carbonyl sulfide and its precursors traced by sulfur isotopes

Limnology and Oceanography, EarlyView.
Abstract Carbonyl sulfide (OCS) is a major precursor of stratospheric sulfate aerosols and a proxy for terrestrial photosynthesis. In recent years, sulfur‐isotope measurements (δ34S) of OCS emerged as an approach to constrain the OCS budget. Yet, such measurements are still scarce for aquatic OCS.
Chen Davidson, Alon Angert, Yasmin Avidani, Sinikka T. Lennartz, Marc von Hobe, Alon Amrani   +5 more
wiley   +1 more source