Results 21 to 30 of about 1,492 (184)

Determination of Rare Earth Elements in Peridotite by Inductively Coupled Plasma-Mass Spectrometry after Alkali Fusion and Mg(OH)2 and Fe(OH)3 Coprecipitation

Yankuang ceshi, 2017
Characteristics of REEs in peridotite is significant for studying petrogenesis and magmatic processes. Due to the serious interference of matrix elements such as Mg and Fe, it is difficult to determine the low contents of REEs in peridotite (∑REEs=0.1-1 ...
LI Wei-liang, CHENG Xiu-hua, LI Zhong-yu, WANG Peng   +3 more
doaj   +1 more source

Gravimetric structure for the abyssal mantle massif of Saint Peter and Saint Paul peridotite ridge, Equatorial Atlantic Ocean, and its relation to active uplift

Anais da Academia Brasileira de Ciências, 2014
This paper presents gravimetric and morphologic analyses based on the satellite-derived data set of EGM2008 and TOPEX for the area of the oceanic mantle massif of the Saint Peter and Saint Paul peridotite ridge, Equatorial Atlantic Ocean.
KENJI F. MOTOKI, AKIHISA MOTOKI, SUSANNA E. SICHEL   +2 more
doaj   +1 more source

Weakening of Peridotite Sheared at Hydrothermal Conditions

Geochemistry, Geophysics, Geosystems, 2021
We conducted triaxial friction tests at hydrothermal conditions (25°C–350°C) on gouges of peridotite and its principal mineral constituents olivine and orthopyroxene. Pore‐fluid chemistry was varied by the use of peridotite, granite, or quartzite driving
Diane E. Moore, David A. Lockner
doaj   +1 more source

Creation of a Landslide Susceptibility Map Using Short‐Term Data From the July 2018 Heavy Rainfall in Southern Hiroshima Prefecture

Geological Journal, EarlyView.
This work advances landslide susceptibility mapping by incorporating short‐term trigger data with landscape susceptibility mapping. We also examine the importance of downsampling, watershed delineation and geospatial correlations in evaluating outcomes.
Kanta Kotsugi, Ting Liu, Toshiro Hata, Rebecca Muenich   +3 more
wiley   +1 more source

Apatite in Carbonatite Preserving Primary Magmatic, Post‐Magmatic Overgrowth, and Post India‐Asia Collision‐Related Hydrothermal Alteration: Evidenced From U–Pb Isotope and Trace Element Geochemistry

Geological Journal, EarlyView.
U–Pb isotope and trace element geochemistry of apatite from carbonatites of Peshawar Plain Alkaline Igneous Province, western Himalaya shows Permo‐Carboniferous magmatism, an additional magmatic pulse during Cretaceous, and post‐magmatic hydrothermal/metasomatism during Oligocene. ABSTRACT U–Pb isotope and trace element geochemistry of apatite combined
Mehboob ur Rashid, Hafiz U. Rehman, Hao‐Yang Lee, Sun‐Lin Chung, Kaushik Das, Kazumasa Aoki, Muhammad Jawad Zeb, Nasir Ahmad, Muhammad Hussain, Hiroshi Yamamoto   +9 more
wiley   +1 more source

Chromian spinel geochemistry as a petrogenetic indicator in the chromitites and peridotites of the Bajgan Complex, Western Makran [PDF]

پترولوژی
IntroductionEconomic chromite deposits are very common in ophiolite belts. These deposits usually occur in the uppermost horizons of the ophiolite mantle sequence or within the ultramafic cumulitic rocks at the base of the crustal sequence (González ...
Leila Vahedi, Morteza Delavari, Emilio Saccani   +2 more
doaj   +1 more source

Genesis of pyroxenite veins in supra-subduction zone peridotites: Evidence from petrography and mineral composition of Egiingol massif (Northern Mongolia)

China Geology, 2020
: Swarms of orthopyroxenite and websterite veins are found within Egiingol residual SSZ peridotite massif of Dzhida terrain (Central Asian Orogenic Belt, Northern Mongolia).
Anas A. Karimov, Marina A. Gornova, Vasiliy A. Belyaev, Aleksander Ya. Medvedev, Nikolay V. Bryanskiy   +4 more
doaj   +1 more source

Neural Networks and Multivariate Analysis Based on Geochemical Data to Determine Stone Provenance From Ancient Calabrian Quarries (Southern Italy)

Archaeometry, EarlyView.
ABSTRACT This study shows an innovative approach to determine the origin of some Calabrian rocks quarried used in ancient times. Twenty‐five quarries, distributed in all the Calabrian provinces (Southern Italy), were studied and sampled. Ten samples were taken from each quarry, for a total of 250 samples.
Domenico Miriello, Stefano Columbu, Raffaella De Luca, Marco Lezzerini, Mirco Taranto, Fabrizio Antonelli   +5 more
wiley   +1 more source

Abundant Ancient Melt‐Depleted Peridotite Beneath the Marion Rise, Southwest Indian Ocean, Effects on Basalt Composition and Dynamic Topography

Geochemistry, Geophysics, Geosystems
The Marion Rise (MR) at the central Southwest Indian Ridge (SWIR) is an ultra‐slow spreading ridge with thin crust, shallow ridge depth, sparse basaltic coverage, and exposed peridotite.
Dominic Woelki, Vincent Salters, Andreas Stracke, Felix Genske, Gary White, Daniele Brunelli   +5 more
doaj   +1 more source

The capacity of hydrous fluids to transport and fractionate incompatible elements and metals within the Earth's mantle

Geochemistry, Geophysics, Geosystems, 2014
Both silicate melts and aqueous fluids are thought to play critical roles in the chemical differentiation of the Earth's crust and mantle. Yet their relative effects are poorly constrained. We have addressed this issue by measuring partition coefficients
John Adam, Marek Locmelis, Juan Carlos Afonso, Tracy Rushmer, Marco L. Fiorentini   +4 more
doaj   +1 more source