Results 31 to 40 of about 8,887 (226)

Differential Phanerozoic evolution of cratonic and non-cratonic lithosphere from a thermochronological perspective: São Francisco Craton and marginal orogens (Brazil) [PDF]

open access: yesGondwana Research, 2021
Abstract The Sao Francisco Craton (SFC) and its marginal Aracuai and Brasilia orogens exhibit a significant diversity in their lithospheric architecture. These orogens were shaped during the Neoproterozoic–Cambrian amalgamation of West Gondwana. The rigid cratonic lithosphere of the SFC and the relatively weak lithosphere of the Aracuai Orogen were ...
Ana Fonseca   +5 more
openaire   +2 more sources

Two-step Gravity Inversion Reveals Variable Architecture of African Cratons

open access: yesFrontiers in Earth Science, 2021
The lithospheric build-up of the African continent is still to a large extent unexplored. In this contribution, we present a new Moho depth model to discuss the architecture of the three main African cratonic units, which are: West African Craton, Congo ...
Peter Haas   +3 more
doaj   +1 more source

Tectonic overview of the West Gondwana margin [PDF]

open access: yes, 2008
The oceanic southern margin of Gondwana, from southern South America through South Africa, West Antarctica, New Zealand (in its pre break-up position), and Victoria Land to Eastern Australia is one of the longest and longest-lived active continental ...
Pankhurst, Robert J., Vaughan, Alan P.M.
core   +1 more source

Noroeste da África – Nordeste do Brasil (Província Borborema) Ensaio comparativo e problemas de correlação [PDF]

open access: yesGeologia USP. Série Científica, 2001
A correlação geológica entre as porções Noroeste da África e Nordeste do Brasil enfrentam ainda uma série de problemas, de natureza virtual e real. A falta de um Projeto Internacional de Correlação Geológica (PICG) voltada para este tema é um aspecto ...
Allen H. Fetter   +2 more
doaj   +3 more sources

Review of the spatial distribution of kimberlite pipes in the tectonic structures of the world

open access: yesGeo&Bio
Kimberlite pipes are vertical or inclined cylindrical or cone-shaped bodies filled with kimberlite, an ultramafic igneous rock. The diameter of kimberlite pipes can vary from a few metres to 1.5 km, and their depth reaches several kilometres.
Andrii Luniachek
doaj   +1 more source

Neoarchean sanukitoids from the Karelian and Bundelkhand cratons: comparison of composition, distribution and geodynamic setting

open access: yesTransactions of the Karelian Research Centre of the Russian Academy of Sciences, 2019
This study presents comparison of distribution and composition of Neoarchean sanukitoid massifs from Karelian (Fennoscandian Shield) and Bundelkhand (Indian Shield) Cratons.
Кумар Батук Джоши   +3 more
doaj   +1 more source

The Lomagundi-Jatuli carbon isotopic event recorded in the marble of the Tandilia System basement, Río de la Plata Craton, Argentina [PDF]

open access: yes, 2019
The “Lomagundi-Jatuli event” corresponds to the most important δ13C positive anomaly (≥5‰) globally reported in Palaeoproterozoic marine carbonates (between ∼2.30 and 2.06 Ga).
Ballivian Justiniano, Carlos Alberto   +6 more
core   +1 more source

A new limit for the NW Río de la Plata Craton Border at about 24°S (Argentina) detected by Magnetotellurics [PDF]

open access: yes, 2015
Old South American structures constitute a puzzle where the Río de la Plata Craton is the most important clue in the assembly of SW Gondwana. The present study is aimed at characterizing the western border of the Río de la Plata Craton on the basis of ...
Barcelona, Hernan   +4 more
core   +1 more source

U-Pb age of Kaapvaal craton titanite: geotectonic interpretation and correlation with the Karelian craton

open access: yesTransactions of the Karelian Research Centre of the Russian Academy of Sciences, 2019
The results of dating of Kaapvaal Craton titanite are reported. It is shown that metamorphiczircon, apatite, amphibole and garnet in the Neoarchaean tectono-thermal activation belt in the eastern Swaziland terrane have an age of ca.
Наталья Сергеевна Нестерова   +5 more
doaj   +1 more source

Organic Geochemical Characterization and Exploration Prospects of Hydrocarbon Source Rocks in Nepal

open access: yesEnergy Science &Engineering, EarlyView.
It provides a more detailed introduction to the current situation of oil and gas exploration in Nepal, as well as the properties and distribution characteristics of source rocks. ABSTRACT This study aims to evaluate the hydrocarbon generation potential and exploration prospects of hydrocarbon source rocks in the Dailekh to Dang–Tansen area of Nepal ...
Guoqiang Zhang   +4 more
wiley   +1 more source

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