Terra Nova, Volume 38, Issue 2, Page 77-86, April 2026.ABSTRACT Deep crustal fragments and structural lineaments identified through satellite gravity data provide evidence for the extension of the reworked ancient basement of the Central African Block into the northern São Francisco Craton and southern Borborema Province.
Douglas Teixeira Martins +3 more
wiley +1 more source
Terra Nova, Volume 38, Issue 2, Page 97-105, April 2026.ABSTRACT The Transbrasiliano‐Kandi‐4°50′ (TK4) shear zone in western Gondwana crosscuts South America and NW Africa for at least 6000 km. Despite its impressive size, the timing of the main episode of dextral ductile shearing is uncertain. We present detailed in situ multi‐mineral geochronology of mylonites from both Brazil and Algeria supporting that ...
F. A. Caxito +4 more
wiley +1 more source
The role of high- and low-temperature ocean crust alteration for the marine calcium budget [PDF]
, 2007 Calcium (Ca) is a key element for the understanding of the chemical evolution of the ocean and for the global climate on long geological time scales.
Amini, Marghaleray
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Characterization and nutrient release from silicate rocks and influence on chemical changes in soil
Revista Brasileira de Ciência do Solo, 2012 The expansion of Brazilian agriculture has led to a heavy dependence on imported fertilizers to ensure the supply of the growing food demand. This fact has contributed to a growing interest in alternative nutrient sources, such as ground silicate rocks ...
Douglas Ramos Guelfi Silva +6 more
doaj +1 more source
Naturally Occurring Asbestos in Alaska and Experiences and Policy of Other States Regarding its Use [PDF]
, 2009 INE/AUTC 09 ...
Hargesheimer, John +2 more
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Distinct Hadean Mantle Sources of Felsic and Mafic Terranes Juxtaposed in the Paleoarchean
Geochemistry, Geophysics, GeosystemsThe short‐lived radionuclide system 146Sm‐142Nd can provide direct information about geological differentiation events in the terrestrial Hadean (>4.0 Ga) mantle.
Arathy Ravindran +5 more
doaj +1 more source
Workshop on Magmatic Processes of Early Planetary Crusts: Magma Oceans and Stratiform Layered Intrusions [PDF]
The significance of the lunar highland pristine cumulate samples were reevaluated with the aid of the additional insights provided by geologically constrained terrestrial investigations.
Mccallum, I. S., Walker, D.
core +1 more source
Mineralised ultramafic rocks in South Greenland
Rapport Grønlands Geologiske Undersøgelse, 1971 In 1960 several mineralised ultramafic boulders with a remarkable content of Pt were found by M. Loretan in the neighbourhood of Sarqa fjord in the Nanortalik district, South Greenland. This stimulated interest in a closer examination of the mafic and ultramafic rocks of South Greenland and in 1962 and 1963 J. P.
openaire +2 more sources
Stored mafic/ultramafic crust and early Archean mantle depletion [PDF]
Both early and late Archean rocks from greenstone belts and felsic gneiss complexes exhibit positive epsilon(Nd) values of +1 to +5 by 3.5 Ga, demonstrating that a depleted mantle reservoir existed very early.
Chase, Clement G., Patchett, P. J.
core +1 more source
Relationships of soil, grass, and bedrock over the Kaweah serpentine melange through spectral mixture analysis of AVIRIS data [PDF]
A linear mixing model is used to model the spectral variability of an AVIRIS scene from the western foothills of the Sierra Nevada and calibrate these radiance data to reflectance.
Mustard, John F.
core +1 more source