Results 21 to 30 of about 7,693 (174)

The Neodymium Stable Isotope Composition of the Oceanic Crust: Reconciling the Mismatch Between Erupted Mid-Ocean Ridge Basalts and Lower Crustal Gabbros

open access: yesFrontiers in Earth Science, 2020
The trace element and isotopic compositions of mid-ocean ridge basalts (MORB) provide an important cornerstone for all studies seeking to understand mantle evolution.
Alex J. McCoy-West   +3 more
doaj   +1 more source

Evaluation of the Impact of Land Use Changes on Soil Erosion in the Tropical Maha Oya River Basin, Sri Lanka

open access: yesLand, 2022
Soil degradation is a serious environmental issue in many regions of the world, and Sri Lanka is not an exception. Maha Oya River Basin (MORB) is one of the major river basins in tropical Sri Lanka, which suffers from regular soil erosion and degradation.
Chathura Palliyaguru   +6 more
doaj   +1 more source

Geochemistry of volcanic rocks and dykes from the Remeshk-Mokhtarabad and Fannuj-Maskutan Ophiolites (Makran Accretionary Prism, SE Iran): New constraints for magma generation in the Middle East neo-Tethys

open access: yesGeosystems and Geoenvironment, 2023
The Remeshk-Mokhtarabad and Fannuj-Maskutan ophiolites represent two major ophiolitic units in the North Makran Domain (Makran Accretionary Prism).
Emilio Saccani   +6 more
doaj   +1 more source

Geochemical characterization of basalts from west of Khash (SE Iran): an approach to the nature of the mantle source [PDF]

open access: yesپترولوژی, 2017
Monogenic basaltic cinder cones and lava flows from west of Khash are part of volcanic arc of northern Makran, formed as a result of subduction of Oman oceanic lithosphere beneath the Eurasian plate. The basalts belong to medium-K calc-alkaline series as
Zahra Firouzkouhi   +4 more
doaj   +1 more source

Geochemical characterization of oceanic basalts using Artificial Neural Network

open access: yesGeochemical Transactions, 2009
The geochemical discriminate diagrams help to distinguish the volcanics recovered from different tectonic settings but these diagrams tend to group the ocean floor basalts (OFB) under one class i.e., as mid-oceanic ridge basalts (MORB).
Iyer Sridhar D, Das Pranab
doaj   +1 more source

Chemical Geodynamics Insights From a Machine Learning Approach

open access: yesGeochemistry, Geophysics, Geosystems, 2022
The radiogenic isotope heterogeneity of oceanic basalts is often assessed using 2D isotope ratio diagrams. But because the underlying data are at least six dimensional (87Sr/86Sr, 143Nd/144Nd, 176Hf/177Hf, and 208,207,206Pb/204Pb), it is important to ...
A. Stracke   +4 more
doaj   +1 more source

MORB-derived amphibolites in the Paleozoic basement of the Aluminé Igneous-Metamorphic Complex, Neuquén, Argentina: Decoding its genesis, P-T evolution and pre-Andean regional correlations

open access: yesGeologica Acta, 2019
Amphibolites included in the metapelitic sequence and as xenoliths in intrusive magmatic rocks outcropping in the southern sector of the Aluminé Igneous-Metamorphic Complex (AIMC), Neuquén, Argentina, are studied in detail in order to determine their ...
I. URRAZA, S. DELPINO, L. GRECCO
doaj   +1 more source

Early Permian magmatism above a slab window in Inner Mongolia, North China: Implications for the Paleo-Asian Ocean subduction processes and accretionary crustal growth

open access: yesSolid 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

MORB—a Mohole misbegotten?

open access: yesDeep Sea Research Part B. Oceanographic Literature Review, 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

open access: yesGeochemistry, 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

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