Results 1 to 10 of about 315,004 (173)
Some of the next articles are maybe not open access.

Abiotic synthesis of graphitic carbons in the Eoarchean Saglek-Hebron metasedimentary rocks [PDF]

open access: yesNature Communications
Graphite in metasedimentary rocks of the Eoarchean Saglek-Hebron Gneiss Complex (Canada) is depleted in 13C and has been interpreted as one of the oldest traces of life on Earth.
Zixiao Guo   +6 more
doaj   +4 more sources

Geochemical constraints on provenance and source area weathering of metasedimentary rocks from the Paleoproterozoic (~2.1 Ga) Wa-Lawra Belt, southeastern margin of the West African Craton

open access: yesGeodinamica Acta, 2019
The Wa-Lawra Belt which is situated in the northern part of Ghana consists of Paleoproterozoic Birimian fine metasedimentary rocks metamorphosed to greenschist facies, particularly, in the western part.
Daniel K. Asiedu   +2 more
exaly   +2 more sources

Petrography and Metamorphism of the Metasedimentary Country-Rocks of the Jacurici Valley Chromitite-Hosting Mafic-Ultramafic Complexes, Bahia, Northeastern Brazil [PDF]

open access: yesGeologia USP. Série Científica, 2001
This paper deal with on the metasedimentary country-rocks of the chromite-bearing ultramafic rocks that occur in the “Jacurici River Valley Chromium District” northeastern Bahia, Brazil.
Eliane A. Del Lama   +2 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

Home - About - Disclaimer - Privacy