Results 31 to 40 of about 59,876 (275)

Rapid transition from primary to secondary crust building on the Moon explained by mantle overturn

Nature Communications, 2023
Geochronology indicates a rapid transition (tens of Myrs) from primary to secondary crust building on the Moon. The processes responsible for initiating secondary magmatism, however, remain in debate.
Tabb C. Prissel, Nan Zhang, Colin R. M. Jackson, Haoyuan Li   +3 more
doaj   +1 more source

Water-rich basalts at mid-ocean-ridge cold spots [PDF]

, 2004
Although water is only present in trace amounts in the suboceanic upper mantle, it is thought to play a significant role in affecting mantle viscosity, melting and the generation of crust at mid-ocean ridges. The concentration of water in oceanic basalts
Bonatti, Enrico, Cipriani, Anna, Ligi, Marco, Ottolini, Luisa   +3 more
core   +2 more sources

Petrogenesis and tectonic significance of mafic–ultramafic rocks from Southwest Yunnan, China

Comptes Rendus. Géoscience, 2020
This study focuses on the mafic–ultramafic lavas of the Early Carboniferous outcrop in Mangxin, southwestern Yunnan, China. Picrites with 26–32 wt% MgO and a quenched texture are the most significant components of this rock association.
Shi, Qing, Fang, Nianqiao
doaj   +1 more source

The Meaning of Pressure for Primary Magmas: New Insights From PRIMELT3‐P

Geochemistry, Geophysics, Geosystems, 2023
This paper reports new software, PRIMELT3‐P, for computing the pressure and temperature range over which a primary basaltic magma was formed by adiabatic decompression and fractional melting of fertile mantle peridotite.
Claude T. Herzberg, Paul D. Asimow, Juan David Hernández‐Montenegro   +2 more
doaj   +1 more source

Insights into mantle composition and mantle melting beneath mid-ocean ridges from postspreading volcanism on the fossil Galapagos Rise [PDF]

, 2011
New major and trace element and Sr, Nd, and Pb isotope data, together with 39Ar-40Ar ages for lavas from the extinct Galapagos Rise spreading center in the eastern Pacific reveal the evolution in magma compositions erupted during slowdown and after the ...
Anderson, Arevalo, Batiza, Batiza, Batiza, Batiza, Batiza, Batiza, Bohrson, Buck, Castillo, Castillo, Choe, Choi, Cipriani, Clague, Davis, Davis, Donnelly, Duncan, Eakins, Eason, Garbe-Schönberg, Haase, Haase, Hart, Harvey, Herron, Hirano, Hirschmann, Hoernle, Hébert, Ingo Grevemeyer, Ito, Ito, Janney, Karsten M. Haase, Kasting, Klein, Konter, Koppers, Koppers, Langmuir, Lin, Liu, Macdonald, Mammerickx, Marcel Regelous, McKenzie, Menard, Michael, Nicole Stroncik, Niu, Niu, Niu, Niu, Niu, Parmentier, Pearce, Philipp A. Brandl, Phipps Morgan, Phipps Morgan, Phipps Morgan, Pilet, Presnall, Prinzhofer, Regelous, Regelous, Robert A. Duncan, Salters, Salters, Salters, Schilling, Scott, Shen, Sleep, Snow, Sotin, Spiegelman, Spiegelman, Stracke, Stracke, The MELT Seismic Team, Tian, Todt, Tormey, Warren, Wendt, Zindler   +88 more
core   +1 more source

Petrological Geodynamics of Mantle Melting II. AlphaMELTS + Multiphase Flow: Dynamic Fractional Melting

Frontiers in Earth Science, 2018
In this second installment of a series that aims to investigate the dynamic interaction between the composition and abundance of the solid mantle and its melt products, the classic interpretation of fractional melting is extended to account for the ...
Massimiliano Tirone
doaj   +1 more source

Dehydration Melting Below the Undersaturated Transition Zone

Geochemistry, Geophysics, Geosystems, 2020
A reflector 70–130 km below the base of the transition zone beneath Tibet is observed in receiver functions and underside seismic reflections, at depths consistent with the transition of garnet to bridgmanite.
W. R. Panero, C. Thomas, R. Myhill, J. S. Pigott, C. Raepsaet, H. Bureau   +5 more
doaj   +1 more source

Mid-Cretaceous extensional magmatism in the Alborz Mountains, north Iran; geochemistry and geochronology of Gasht-Masuleh gabbros

Swiss Journal of Geosciences, 2023
In the Gasht-Masuleh area in the Alborz Mountains, gabbroic magma intruded Palaeozoic metasediments and Mesozoic sediments and crystallised as isotropic and cumulate gabbros.
Leila Rezaei, Martin J. Timmerman, Mohssen Moazzen, Uwe Altenberger, Jiří Sláma, Masafumi Sudo, Christina Günter, Franziska D. H. Wilke, Anja M. Schleicher   +8 more
doaj   +1 more source

Post-collisional Tertiary–Quaternary mafic alkalic magmatism in the Carpathian–Pannonian region: a review [PDF]

, 2004
Mafic alkalic volcanism was widespread in the Carpathian–Pannonian region (CPR) between 11 and 0.2 Ma. It followed the Miocene continental collision of the Alcapa and Tisia blocks with the European plate, as subduction-related calc-alkaline magmatism was
Albarede, Aldanmaz, Alexandru Szakács, Balogh, Balogh, Balogh, Balogh, Blusztajn, Campbell, Cebria, Class, Csontos, Csontos, Dobosi, Dobosi, Dobosi, Downes, Downes, Downes, Ebner, Embey-Isztin, Embey-Isztin, Embey-Isztin, Fodor, Granet, Gîrbacea, Harangi, Harangi, Harangi, Harangi, Hilary Downes, Hofmann, Horváth, Höernle, Ioan Seghedi, Jung, Kadosa Balogh, Konečny, Konečny, Mason, Mason, Maţenco, McKenzie, Orlando Vaselli, Pécskay, Pécskay, Rosenbaum, Royden, Royden, Roşu, Salters, Seghedi, Seghedi, Seghedi, Seghedi, Seghedi, Shaw, Sims, Späth, Späth, Sun, Szabó, Szabó, Szakács, Tatsumi, Thirlwall, Thirlwall, Vaselli, Wedepohl, Wilson, Wilson, Wöerner, Zindler, Zoltán Pécskay, Zou, Šimon   +75 more
core   +1 more source

Geochemistry and Structure of Krakatoa Volcano in the Sunda Strait, Indonesia

Geosciences, 2018
The violent eruption of Krakatoa Volcano located in the Sunda Strait, Indonesia, in 1883 represents one of the deadliest eruptions in human civilization.
Mirzam Abdurrachman, Sri Widiyantoro, Bambang Priadi, Taufik Ismail   +3 more
doaj   +1 more source