Results 81 to 90 of about 58,669 (239)

Sr-Nd Systematics and REE distribution in the type magnesite deposits in Lower Riphean of South Urals province

open access: yesЛитосфера, 2016
The geochemistry and REE of magnesite and host carbonate rocks of two Lower Riphean deposits of the South Urals province (Satka and Ismakaevo ore fields) confirm the metasomatic nature of the magnesite.
M. T. Krupenin   +2 more
doaj   +2 more sources

Further evidence for early lunar magnetism from troctolite 76535 [PDF]

open access: yes, 2017
The earliest history of the lunar dynamo is largely unknown and has important implications for the thermal state of the Moon and the physics of dynamo generation.
Garrick-Bethell, Ian   +4 more
core   +1 more source

Mineralogy and thermobarometry of the Kalevian volcano-plutonic complex of the Kaskama block (Inari Terrane, Kola-Norwegian Region, Fennoscandian Shield)

open access: yesЗаписки Горного института
The petrogenesis and evolution of metamorphic rocks of the volcano-plutonic units of the Kaskama block of the Inari Terrane in northwestern Russia were studied.
Aleksandr B. Vrevsky   +2 more
doaj  

Neoproterozoic ultramafic and mafic magmatism in the Eastern Cordillera of the central peruvian Andes: the Tapo Massif [PDF]

open access: yes, 2010
A highly dismembered assemblage of ultramafic and mafic rocks is exposed in the Eastern Cordillera of the Central Peruvian Andes, extending along a discontinuous NW-SE belt over some 250 km between 12° and 9° S of latitude.
Acosta, Jorge   +4 more
core   +2 more sources

El volcanismo jurásico superior de la Formación Río Damas-Tordillo (33°-35,5°S): antecedentes su sobre petrogénesis, cronología, proveniencia e implicancias tectónicas [PDF]

open access: yes, 2014
Los depósitos continentales y volcánicos de la Formación Rio Damas-Tordillo, Jurásico Superior, representan un período restringido de sedimentación continental dentro del registro mayormente marino de la Cuenca Neuquina.
Calderón, Sergio   +7 more
core   +2 more sources

Technical note: Altitude scaling of 36Cl production from Fe [PDF]

open access: yesGeochronology
Cosmogenic nuclide production rates depend on the excitation functions of the underlying nuclear reactions and the intensity and energy spectrum of the cosmic-ray flux.
A. K. Moore, A. K. Moore, D. E. Granger
doaj   +1 more source

Origin of carbonate-silicate rocks of the Porya Guba (the Lapland-Kolvitsa Granulite Belt) revealed by stable isotope analysis (δ18O, δ13C)

open access: yesЗаписки Горного института
Carbonate-silicate rocks of unclear origin have been observed in granulites of the Porya Guba of the Lapland-Kolvitsa Belt within the Fennoscandinavian Shield.
Dmitrii P. Krylov, Ekaterina V. Klimova
doaj  

Geochemical characterization of Gubanovskaya intrusion of rapakivi granites (Wiborg massif)

open access: yesVestnik MGTU
The paper presents new data on geology and composition of rapakivi granites of Gubanovskaya intrusion (Wiborg massif). Petrographic and geochemical characteristics of rapakivi granites of the second (ovoid) and third (trachytoid) phases of intrusion, as ...
Rogova I. V.   +3 more
doaj   +1 more source

A new method for amino acid geochronology of the shell of the bivalve mollusc Arctica islandica [PDF]

open access: yesGeochronology
The bivalve mollusc Arctica islandica can live for hundreds of years, and its shell has provided a valuable resource for sclerochronological studies and geochemical analyses for understanding palaeoenvironmental change. Shell specimens recovered from the
M. L. G. Conti   +5 more
doaj   +1 more source

Paleomagnetism, rock magnetism and geochemical aspects of early Cretaceous basalts of the Paraná Magmatic Province, from Misiones, Argentina [PDF]

open access: yes, 2006
The basalts of the Posadas Formation were extruded during the huge continental volcanism that affected the Parana Basin in the Lower Cretaceous. We have carried out a paleomagnetic and rock-magnetic study on samples collected along a basalt outcrop ...
Lagorio, Silvia Leonor   +2 more
core   +1 more source

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