Results 101 to 110 of about 89,166 (344)

The Magmatic Origin of Ores [PDF]

Geological Magazine, 1928
Of late years a great deal has been written on the genesis of ore-deposits, and in particular much space has been devoted to more or less controversial discussions of the possibility of a magmatic origin for many important types, both in individual instances and by way of generalizations.
openaire   +2 more sources

New Geochronological Constraints on the Late Palaeozoic Tarija Basin, Southern Bolivia: Tectonic and Palaeoclimatic Implications

Terra Nova, EarlyView.
ABSTRACT The Carboniferous‐Permian Tarija basin of southern Bolivia evolved under major tectonic and climatic influence. The timing of transition from glacially influenced to arid conditions, after the Gondwanide tectonic event, has been based mainly on palynological correlations.
Felipe R. Ferroni, Peter G. DeCelles, Jaime Oller Veramendi, Juan Andrés Dahlquist, Mercedes di Pasquo   +4 more
wiley   +1 more source

The structure and petrology of the Cnoc nan Cuilean Intrusion, Loch Loyal Syenite Complex, NW Scotland [PDF]

, 2013
In NW Scotland, several alkaline intrusive complexes of Silurian age intrude the Caledonian orogenic front. The most northerly is the Loch Loyal Syenite Complex, which is divided into three separate intrusions (Ben Loyal, Beinn Stumanadh and Cnoc nan ...
Goodenough, Kathryn M., Gunn, A. Gus, Hughes, Hannah S.R., Lacinska, Alicja, McCormac, Michael, Walters, Abigail S.   +5 more
core   +3 more sources

The end of Midcontinent Rift magmatism and the paleogeography of Laurentia

, 2017
Paleomagnetism of the North American Midcontinent Rift provides a robust paleogeographic record of Laurentia (cratonic North America) from ca. 1110 to 1070 Ma, revealing rapid equatorward motion of the continent throughout rift magmatism.
L. Fairchild, N. Swanson‐Hysell, J. Ramezani, C. Sprain, S. Bowring   +4 more
semanticscholar   +1 more source

Early-Devonian intrusive magmatism of the Urals as indicator critical stage Paleozoic history mobile belt

Литосфера, 2015
It is established that during all-Uralian stage of mantle-type magmatism of Early Devonian age (410-393 Ma) the mantle Ordovician-Silurian magmatism was changed by mantle-crustal and crustal types.
G. B. Fershtater
doaj  

Thermal and Magmatic Evolution of the Moon

Reviews in Mineralogy and Geochemistry, 2006
As with all science, our continually developing concepts of lunar evolution are firmly tied to both new types of observations and the integration of these observations to the known pool of data. This process invigorates the intellectual foundation on which old models are tested and new concepts are built.
Shearer, C, Hess, P, Wieczorek, M, Pritchard, M, Parmentier, E, Borg, L, Longhi, J, Elkins-Tanton, LT, Neal, C, Antonenko, I, Canup, R, Halliday, A, Grove, T, Hager, B, Lee, D, Wiechert, U   +15 more
openaire   +3 more sources

Síntesis geocronológica del magmatismo, metamorfismo y metalogenia de Costa Rica, América Central Geochronological synthesis of magmatism, metamorphism and metallogeny of Costa Rica, Central America

Revista Geológica de América Central, 2012
Una recopilación completa de 651 determinaciones de edades radiométricas desde 1968 (415 dataciones 40Ar/39Ar, 211 K/Ar, 5 U/Th, 4 Rb/Sr, 2 U/Pb y de fisión termocronología con zircón), tanto aquellas publicadas desde 1968 como muchas nuevas ...
Guillermo E. Alvarado, Phillipe B. Gans
doaj  

Discovery of bauxite-type helium source rock in Jinzhong basin, central North China and its resource potential evaluation

China Geology, 2023
Qiao Zhang, Jun-lin Zhou, Yu-hong Li, Ya-zhuo Niu, Wang Guo, Shang-wei Ma, Yun-peng Zhang, Shao-hua Hu, Yu Ding   +8 more
doaj   +1 more source

Introduction to a Resources Special Issue on Criticality of the Rare Earth Elements: Current and Future Sources and Recycling

, 2018
The rare earth elements (REE) are vital to modern technologies and society and are amongst the most important of the critical elements. This special issue of Resources examines a number of facets of these critical elements, current and future sources of ...
Jowitt, Simon M.
core   +2 more sources

Ultramafic xenoliths from the Bearpaw Mountains, Montana, USA: evidence for multiple metasomatic events in the lithospheric mantle beneath the Wyoming craton [PDF]

, 2004
Ultramafic xenoliths in Eocene minettes of the Bearpaw Mountains volcanic field (Montana, USA), derived from the lower lithosphere of the Wyoming craton, can be divided based on textural criteria into tectonite and cumulate groups. The tectonites consist
Abidin, M.S.Z., Codemard, C.A., Dupriez, P., Farrell, C., Jeong, Y., Ji, J., Maran, J.-N., Nilsson, J., Payne, D.N., Richardson, D.J., Sahu, J.K., Yoo, S.   +11 more
core   +2 more sources