Results 21 to 30 of about 11,994 (188)

Changing Mantle Sources and the Effects of Crustal Passage on the Steens Basalt, SE Oregon: Chemical and Isotopic Constraints

Geochemistry, Geophysics, Geosystems, 2020
Continental flood basalts are more prone to compositional modification from passage through thicker and (or) more felsic crust in comparison to their oceanic counterparts.
N. E. Moore, A. L. Grunder, W. A. Bohrson, R. W. Carlson, I. N. Bindeman   +4 more
doaj   +1 more source

A Mesoarchean Large Igneous Province on the Eastern Kaapvaal Craton (Southern Africa) Confirmed by Metavolcanic Rocks from Kubuta, Eswatini

Lithosphere, 2022
Mesoarchean magmatism is widespread on the eastern margin of the Kaapvaal Craton, but its origin is still poorly understood, mainly because geochemical data is rare.
K. P. Schneider, J. E. Hoffmann, A. Kröner, A. Balduin, P. Sprung, A. M. Schleicher, C. Münker   +6 more
doaj   +1 more source

Distributed Extension Across the Ethiopian Rift and Plateau Illuminated by Joint Inversion of Surface Waves and Scattered Body Waves

Geochemistry, Geophysics, Geosystems, 2022
The East African Rift System provides a rare location in which to observe a wide scope of rifting states. Well‐defined active narrow rifting in the Main Ethiopian Rift (MER) transitions to incipient extension and eventually pre‐rifted lithosphere through
J. Petruska, Z. Eilon
doaj   +1 more source

Constraining the Magmatic Plumbing System in a Zoned Continental Flood Basalt Province

Geochemistry, Geophysics, Geosystems, 2018
The geographic heterogeneities in lava composition observed in continental flood basalt provinces could provide a probe of material upwelling from the deep mantle and their length scales, but their utility is limited by uncertainties in the locus of ...
Tyrone O. Rooney, Susan R. Krans, Daniel Mège, Nicolas Arnaud, Tesfaye Korme, John Kappelman, Gezahegn Yirgu   +6 more
doaj   +1 more source

Heavy Rare Earth Elements and the Sources of Continental Flood Basalts

Journal of Petrology, 2022
AbstractHeavy rare earth elements (HREEs) in mafic and ultramafic volcanic rocks are useful recorders of mantle source processes because their ratios are not easily modified by differentiation. Here we utilize REEBOX PRO, a simulator of adiabatic decompression melting of the mantle, to study the behavior of HREEs in the formation of continental flood ...
Heinonen, Jussi S., Brown, Eric L, Turunen, Sanni T, Luttinen, Arto V   +3 more
openaire   +2 more sources

Frictional Instabilities and Carbonation of Basalts Triggered by Injection of Pressurized H2O- and CO2- Rich Fluids [PDF]

, 2018
The safe application of geological carbon storage depends also on the seismic hazard associated with fluid injection. In this regard, we performed friction experiments using a rotary shear apparatus on precut basalts with variable degree of hydrothermal ...
Andrea, Marzoli, Elena, Spagnuolo, Francois, Passelegue, Giacomel, Piercarlo, Giulio Di Toro,, Nasrrddine, Youbi, Nazzari, Manuela   +6 more
core   +1 more source

Multivariate analysis of elements from the microhabitats of selected plateaus in the Western Ghats, Maharashtra, India

Journal of Threatened Taxa, 2019
The Western Ghats represents a small part of the Deccan Traps continental flood basalt province that erupted about 65 million years ago.  It is an area of outstanding scenic beauty and has attracted the attention of geologists, naturalists and ...
Priti Vinayak Aphale, Dhananjay Chintaman Meshram, Dnyaneshwar Maruti Mahajan, Prasad Anil Kulkarni, Shraddha Prasad Kulkarni   +4 more
doaj   +1 more source

Organic walled microfossils in wet peperites from the early Cretaceous Paraná-Etendeka volcanism of Brazil

Scientific Reports, 2023
Large igneous provinces (LIPs) are major magmatic events that have a significant impact on the global environment and the biosphere, for example as triggers of mass extinctions.
Lucas Del Mouro, Bruno Becker-Kerber, Valdecir A. Janasi, Marcelo de Araújo Carvalho, Breno L. Waichel, Evandro F. Lima, Lucas M. M. Rossetti, Vinicius Cruz, Mateus Souza Silva, Natália Famelli, Javier Ortega-Hernández   +10 more
doaj   +1 more source

Geochemistry of Deccan Tholeiite Flows and Dykes of Elephanta Island: Insights into the Stratigraphy and Structure of the Panvel Flexure Zone, Western Indian Rifted Margin

Geosciences, 2020
Elephanta Island near Mumbai is an important area for understanding the stratigraphic and structural framework of the Deccan flood basalt province in the tectonically disturbed Panvel flexure zone on the western Indian rifted margin.
Vanit Patel, Hetu Sheth, Ciro Cucciniello, Gopal W. Joshi, Wencke Wegner, Hrishikesh Samant, Bibhas Sen, Christian Koeberl   +7 more
doaj   +1 more source

Rift and plume: a discussion on active and passive rifting mechanisms in the Afro-Arabian rift based on synthesis of geophysical data [PDF]

Solid Earth
The causal relationship between the activity of mantle plumes and continental break-up is still elusive. The Afro-Arabian rift system offers an opportunity to examine these relationships, in which an ongoing continental break-up intersects a large ...
R. Issachar, R. Issachar, P. Haas, P. Haas, N. Augustin, J. Ebbing   +5 more
doaj   +1 more source