Results 21 to 30 of about 72,842 (206)
Ultra-depleted melts from Kamchatkan ophiolites : evidence for the interaction of the Hawaiian plume with an oceanic spreading center in the Cretaceous? [PDF]
, 2009 We report new data on the major and trace element composition of melt inclusions in spinel phenocrysts (Mg# = 0.7-0.8, Cr/(Cr + Al) = 0.32-0.52, TiO2 = 0.06-0.60 wt.%) from Cretaceous MORB-like basalt (La/Yb = 0.94, Th/Nb = 0.055, Th/La = 0.041) in the ...
Hoernle, Kaj +2 more
core +1 more source
Cretaceous-to-recent record of elevated 3He/4He along the Hawaiian-Emperor volcanic chain [PDF]
, 2004 Helium isotopes are a robust geochemical tracer of a primordial mantle component in hot spot volcanism. The high 3He/4He (up to 35 RA, where RA is the atmospheric 3He/4He ratio of 1.39 × 10−6) of some Hawaiian Island volcanism is perhaps the classic ...
Duncan, R. A. +4 more
core +1 more source
Solid Earth Sciences, 2022 Identifying magmatic rock associations in a subduction zone is substantial for understanding the related geodynamic evolution. The final closure time of the Paleo-Asian Ocean and the exact subduction processes have continuously been controversial ...
Jialiang Li +5 more
doaj +1 more source
Eos, Transactions American Geophysical Union, 1982 Terrestrial basalts are generally saturated with two or more crystal species on eruption and display a limited range of major‐element composition in combination with wide variations in concentrations and ratios of those trace elements that are excluded from the common crystal phases during crystal‐liquid separation events [Jamieson and Clarke, 1970 ...
openaire +2 more sources
A Machine Learning Based‐Approach to Predict the Water Content of Mid‐Ocean Ridge Basalts
Geochemistry, Geophysics, Geosystems, 2023 Water is critical in the evolution of the mantle due to its strong influence on the physicochemical properties of mantle rocks. Mid‐ocean ridge basalts (MORBs) are commonly used to study the compositional characteristics of the convecting upper mantle ...
Jingjun Zhou +5 more
doaj +1 more source
Evidence for a reducing Archean ambient mantle and its effects on the carbon cycle [PDF]
, 2016 Chemical reduction-oxidation mechanisms within mantle rocks link to the terrestrial carbon cycle by influencing the depth at which magmas can form, their composition, and ultimately the chemistry of gases released into the atmosphere.
Aulbach, Sonja, Stagno, Vincenzo
core +1 more source
Geologia USP. Série Científica, 2011 O Grupo Votuverava (ca. 1500 - 1400 Ma) faz parte do Terreno Apiaí, um segmento do Cinturão Ribeira Meridional. É constituído por turbiditos distais com expressivo magmatismo básico representado por lentes concordantes de metabasito.
Frederico Meira Faleiros +3 more
doaj +1 more source
The Significance of Multiple Saturation Points in the Context of Polybaric Near-fractional Melting [PDF]
, 2004 Experimental petrologists have successfully located basaltic liquid compositions parental to mid-ocean ridge basalt that are, within experimental resolution, multiply saturated with three-phase harzburgite or four-phase lherzolite assemblages on their ...
Asimow, Paul D., Longhi, John
core +2 more sources
, 2023 This zip file contains data presented in the submission “Marine magnetic anomalies enhanced by internal stress in rapidly cooled submarine basalts” by Han et al., 2023. 1. Folder “MicroMag” contains two subfolders and a MATLAB script. (1) Subfolder "MicroMag_Models" contains the MERRILL scripts and Patran geometries to reproduce the results.
openaire +1 more source
Morphology and Petrogenesis of Pillow Lavas from the Ganj Ophiolitic Complex, Southeastern Kerman, Iran [PDF]
Journal of Sciences, Islamic Republic of Iran, 2009 The Upper Cretaceous Ganj complex, a part of the Jazmurian ophiolitic belt, is located on the western boundary of Jazmurian depression and separated from Kahnuj ophiolitic complex by north-south trending Jiroft fault.
A.R. Shaker Ardakani
doaj