Results 71 to 80 of about 151,860 (247)

Slab‐Mantle Interaction During Subduction Initiation: Constraints From Trace Element and Sr‐Nd‐Pb Isotope Systematics of Boninite and Other Magmas and Metamorphic Sole in the Oman Ophiolite

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 2, February 2026.
Abstract The Late Cretaceous Oman ophiolite includes a series of volcanic rocks generated during the transition from spreading ridge to protoarc associated with subduction initiation. We analyzed major and trace elements and Sr, Nd, and Pb isotope compositions of lavas and dikes of the protoarc stage, especially boninites. We also analyzed amphibolites
Tsuyoshi Ishikawa, Kazuya Nagaishi, Kyoko Kanayama, Keitaro Kitamura, Shigeyuki Wakaki, Yuki Kusano, Susumu Umino   +6 more
wiley   +1 more source

Fluid–rock interactions in the shallow Mariana forearc: carbon cycling and redox conditions [PDF]

Solid Earth, 2019
Few data exist that provide insight into processes affecting the long-term carbon cycle at shallow forearc depths. To better understand the mobilization of C in sediments and crust of the subducting slab, we investigated carbonate materials that ...
E. Albers, W. Bach, F. Klein, C. D. Menzies, C. D. Menzies, F. Lucassen, D. A. H. Teagle   +6 more
doaj   +1 more source

Impact Reactivation of a Hydrothermal System in Basalt in the Vargeão Dome Impact Structure, Brazil

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract As hydrous minerals have been observed in impact craters on Mars, impact‐generated hydrothermal systems (IGHSs) have been considered as potential habitats for life on that planet. The Vargeão Dome, a 12 km wide impact structure in southern Brazil, was formed in basalts with at least two hydrothermal alteration stages.
Jitse Alsemgeest, Fraukje M. Brouwer, Luis F. Auqué, Kirsten van Zuilen, Natalia Hauser, Wolf Uwe Reimold   +5 more
wiley   +1 more source

"NOVOSIBIRSK" MUD VOLCANO AND EVIDENCE OF ITS ACTIVATIONS (LAKE BAIKAL)

Геодинамика и тектонофизика
An integrated study of mud volcanoes in the World Ocean is important for making assessment of potential geological-ecological disasters caused by rapid large-volume gas discharge into the water column and mud volcano eruptions at the bottom. The study of
О. М. Khlystov, А. V. Khabuev
doaj   +1 more source

High-Resolution Topographic Analyses of Mounds in Southern Acidalia Planitia, Mars: Implications for Possible Mud Volcanism in Submarine and Subaerial Environments

Geosciences, 2018
A northern ocean of Mars is still debated and, if it existed, it may have accompanied valley networks and/or outflow channels, which may have led to the emplacement of a large amount of water to the northern lowlands during the Noachian and/or Hesperian ...
Ryodo Hemmi, Hideaki Miyamoto
doaj   +1 more source

Box Models of Volatile Cycles over the Entire Phanerozoic [PDF]

, 2006
Three stand-alone geochemical box models have been developed to simulate globally coupled biogeochemical cycles. These models reflect the evolution of the participating biotic and abiotic constituents in marine and terrestrial environments, including the
Bartdorff, Oliver
core  

Evolution and Provenance of the Polish Rotliegend in the Southern Permian Basin

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 2, February 2026.
Abstract The Southern Permian Basin (SPB) has been extensively explored for ore deposits. However, a comprehensive evaluation of the remaining copper potential, specifically for sediment‐hosted stratiform copper system, remains lacking. This study applies goSPL, an open‐source landscape and stratigraphic evolution model, to reconstruct the Permian rift‐
Beatriz Hadler Boggiani, Claire Mallard, Tristan Salles, Nicholas Atwood   +3 more
wiley   +1 more source

VOLCANIC ENVIRONMENTS MONITORING BY DRONES MUD VOLCANO CASE STUDY [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2013
Abstract. Volcanic activity has often affected human life both at large and at small scale. For example, the 2010 Eyjafjallajokull eruption caused severe economic damage at continental scale due to its strong effect on air traffic. At a local scale, ash fall and lava flow emission can cause harm and disruption.
S. Amici, M. Turci, F. Giulietti, S. Giammanco, M. F. Buongiorno, A. La Spina, L. Spampinato   +6 more
openaire   +3 more sources

Pliocene–Pleistocene Redox Evolution of the Peruvian Margin: A Multi‐Proxy Approach

Paleoceanography and Paleoclimatology, Volume 41, Issue 2, February 2026.
Abstract Due to upwelling of nutrient‐rich waters, the Peruvian Margin is one of the most productive regions of the global ocean, hosting one of the most pronounced and shallowest oxygen minimum zones. This combination of high productivity and low oxygen makes the Peruvian margin a critical site for reconstructing past environmental changes.
P. L. Fraga‐Ferreira, C. Siebert, M. F. Lehmann, M. Frank, F. Scholz   +4 more
wiley   +1 more source

Rootless cones on Mars indicating the presence of shallow equatorial ground ice in recent times [PDF]

, 2001
High resolution Mars Orbiter Camera (MOC) images have revealed the existence of clusters of small cones in the Cerberus plains, Marte Valles, and Amazonis Planitia, Mars.
Alfred S. McEwen, Burr, Carr, Chapman, Clifford, Fagents, Frey, Hartmann, Hartmann, Hoffman, Keszthelyi, Keszthelyi, Laszlo P. Keszthelyi, Lowry, Mellon, Mouginis-Mark, Peter D. Lanagan, Plescia, Tanaka, Tanaka, Thorarinsson, Thordarson, Thordarson, Thorvaldur Thordarson   +23 more
core   +1 more source