Results 11 to 20 of about 5,077 (206)

Coupled sulfur-silicon isotopes reveal supracrustal origin of Archean continents [PDF]

open access: yesNature Communications
The genesis of Archean continental crust through partial melting of hydrous mafic protolith is widely acknowledged, yet the origin of the mafic protolith remains highly contentious.
Kun Shang   +8 more
doaj   +2 more sources

Constraining the Protoliths of the Apollo Granulite Suite

open access: yesThe Planetary Science Journal
The Apollo granulite suite represents the metamorphosed products of impact-contaminated polymict and monomict lunar breccias. We combine bulk and mineral major and trace element systematics with noble gas isotopes to constrain the highland lithologies ...
J. F. Pernet-Fisher   +4 more
doaj   +3 more sources

The south margin of the central Altyn is an early paleozoic tectonic unit confirmed by Zircon dating evidence [PDF]

open access: yesScientific Reports
The south margin of Central Altyn (SMCA) has long been considered as Precambrian stratigraphic unit of the Altyn Orogen. However, their strata attribution is subjected to challenge by the new finding of Siluran-Devonian metamorphic rocks.
Tuo Ma   +4 more
doaj   +2 more sources

Geochemistry and paleotectonomagmatic setting of metabasites protolith from Asalem metamorphic complex (northwest Rasht) [PDF]

open access: yesپترولوژی, 2016
Asalem metamorphic complex consists mostly of metabasite, metapelite and serpentinite. Metabasites display metamorphic features of greenschist and blueschist facies.
Mohsen Nasrabady, mohammad saadat
doaj   +1 more source

The Protolith of the Carbonate Rich Rocks of the Larder Lake Break [PDF]

open access: yes, 1979
Title: The Protolith of the Carbonate Rich Rocks of the Larder Lake Break, Author: George M.
Werniuk, George M.
openaire   +3 more sources

Tin in granitic melts: The role of melting temperature and protolith composition

open access: yesLithos, 2018
Abstract Granite bound tin mineralization typically is seen as the result of extreme magmatic fractionation and late exsolution of magmatic fluids. Mineralization, however, also could be obtained at considerably less fractionation if initial melts already had enhanced Sn contents.
Wolf, Mathias   +3 more
openaire   +4 more sources

The protoliths of central Himalayan eclogites

open access: yesGSA Bulletin, 2021
Abstract Eclogites represent the highest pressure conditions yet observed from rocks thrust to the surface in the central Himalaya. A detailed investigation of the protolith nature of these eclogites is needed to better understand pre-Himalayan geological history.
Guibin Zhang   +7 more
openaire   +4 more sources

U-Pb geochronology of the Fort Augustus granite gneiss: constraints on the timing of Neoproterozoic and Palaeozoic tectonothermal events in the NW Highlands of Scotland [PDF]

open access: yes, 2001
The West Highland granite gneiss suite in Inverness-shire, Scotland, represents a series of S-type, anatectic granites formed by partial melting of host Neoproterozoic metasediments of the Moine Supergroup.
Kinny, P.D.   +4 more
core   +5 more sources

Graphical interface to construct and apply Machine-learning based Protolith Reconstruction Models (PRMs)

open access: yes, 2023
<p>This project has developed a <strong>Graphical User Interface (GUI) application for Protolith Reconstruction Models (PRMs)</strong> using Python and Streamlit.
Satoshi Matsuno
core   +2 more sources

The Manhattan Schist, New York City: Proposed Sedimentary Protolith, Age, Boundaries, and Metamorphic History

open access: yesGeosciences
There are some persistent basic questions pertaining to the bedrock schist of New York City (NYC). How many mappable schist formations are exposed in NYC, and what was the sedimentary protolith of the Manhattan schists?
John H. Puffer   +2 more
doaj   +2 more sources

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