Results 91 to 100 of about 15,451 (231)

Origin and evolution of the Amazonian craton [PDF]

open access: yes
The Amazonian craton appears to be formed and modifed by processes much like those of the better-known Precambrian cratons, but the major events did not always follow conventional sequences nor did they occur synchronously with those of other cratons ...
Gibbs, A. K., Wirth, K. R.
core   +1 more source

Geochemistry of granitoid rocks from the western Superior Province: Evidence for 2- and 3-stage crustal evolution models [PDF]

open access: yes
The Superior Province is divisible into subprovinces that can be classified as greenstone-tonalite, paragneiss, or batholitic terranes and are distinguished by differences in lithologic proportions, metamorphic grade, and structural style. The origin and
Beakhouse, G. P., errane) are discussed.
core   +1 more source

U–Pb zircon geochronology, petrochemical and Sr–Nd isotopic characteristic of Late Neoproterozoic granitoids of the Bornaward complex (Bardaskan-NE Iran) [PDF]

open access: yes, 2014
The Bornaward granitoids in the Taknar zone are located in the northeast of the central Iranian block in northeast Iran (Khorasan Razavi province), about 280 km southwest of Mashhad city and 28 km northwest of Bardaskan city.
Heidarian Shahri, M. R.   +6 more
core   +1 more source

Geochemistry of I-type Volcanic Arc Granitoid From Tanggamus Regency, Southern Sumatra

open access: yesJournal of Mathematical and Fundamental Sciences
Granitoid intrusion of several provinces on Sumatra is correlated with Southeast Asia tectonics that have occurred since the Permian. Granites from several volcanic arc provinces are located along the western part of Sumatra Island and are found near ...
Ronaldo Irzon   +4 more
doaj   +1 more source

THERMOCHRONOLOGY OF GRANITOID BATHOLITHS AND THEIR TRANSFORMATION INTO METAMORPHIC CORE COMPLEXES (EXAMPLE OF SONG‐CHAI MASSIF, NORTHERN VIETNAM)

open access: yesГеодинамика и тектонофизика, 2019
Based on the reconstruction of the thermal evolution of granitoid batholith, represented by the Song‐Chai gneiss‐granite massif (Northern Vietnam), the long‐term existence of granitoid magma at deep levels of the Earth's crust (H≥25 km, Δt~20–50 Ma) is ...
A. G. Vladimirov   +8 more
doaj   +1 more source

REE Comparison Between Muncung Granite Samples and Their Weathering Products, Lingga Regency, Riau Islands [PDF]

open access: yes, 2016
DOI:10.17014/ijog.3.3.149-161The increasing demand for Rare Earth Elements (REE) is related to the continous development of technology, and these elements are used in modern equipments.
Hutabarat, J. (Johannes)   +3 more
core   +3 more sources

Update Heat Flow Density Map for Portugal [PDF]

open access: yes, 2010
New thermal conductivity, heat production and temperature data obtained in Portugal were used to produce a new heat flow density map. Heat flow density values in Portugal vary between 42 and 115 mW/m2 and allow the extrapolation of temperatures to depths
Correia, Antonio, Ramalho, Elsa Cristina
core  

The tectonic evolution of central and Northern Madagascar and its place in the final assembly of Gondwana [PDF]

open access: yes, 2002
Copyright © 2002 by The University of Chicago. All rights reserved.Recent work in central and northern Madagascar has identified five tectonic units of the East African Orogen (EAO), a large collisional zone fundamental to the amalgamation of Gondwana ...
Collins, A., Windley, F.
core   +2 more sources

Some progress on understanding the Phanerozoic granitoids in China

open access: yesChina Geology, 2018
: There are large volumes of the Phanerozoic granitoid rocks in China and neighboring areas. In recent years, numerous new and precise U-Pb zircon ages have been published for these granitoids, and define many important magmatic events, such as ca.
Tao Wang   +8 more
doaj   +1 more source

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