Results 21 to 30 of about 22,327 (143)
Geosciences, 2023 Beryl is both an accessory and a rock-forming mineral in pegmatites that contain beryl, making it a major source of Be. Beryl-bearing pegmatites of the Shongui deposit, located in the Kola province of the Northeastern Fennoscandian Shield, hold beryl ...
Lyudmila N. Morozova +6 more
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Resolving multiple geological events using in situ Rb–Sr geochronology: implications for metallogenesis at Tropicana, Western Australia [PDF]
Geochronology, 2020 Dating multiple geological events in single samples using thermochronology and geochronology is relatively common, but it is only with the recent advent of triple quadrupole laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) that in ...
H. K. H. Olierook +16 more
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Krypton isotopes in neutron-irradia ted minerals: use in evaluating samples for 87Rb/87Sr dating.
Geofísica Internacional, 1983 Durante la irradiacion con neutrones rapidos, en preparacion para estudios de determinación de edad por 40Ar - 39Ar, isotopos de cripton son producidos de rubidio y estroncio presentes en minerales silicatos naturales. Mediciones de la raz6n 84Kr/86Kr en
J. G. Mitchell
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Литосфера, 2019 Установлено, что формирование золотоносных флюидно-эксплозивных брекчий Дельмачикского месторождения тесно связано с формированием дайковых поясов, сложенных интрузиями амуджиканского комплекса.
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Geochemistry and tectonic controls of the effusive activity related with the ancestral Nevado del Ruiz volcano, Colombia [PDF]
Geofísica Internacional, 2009 In this paper, we discuss the geochemical aspects and the tectonic setting of the effusive activity between 2.0 to 1.0 Ma (the Ancestral Ruiz stage) of Nevado del Ruiz Volcano (NRV: 4° 50-55’N, 75° 14-20’ W, 5,390 masl), this volcano rises at the ...
H. Castillo +3 more
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Geosciences, 2013 To better understand the origin of across-strike K2O enrichments in silicic volcanic rocks from the Andean Central Volcanic Zone, we compare geochemical data for Quaternary volcanic rocks erupted from three well-characterized composite volcanoes situated
Gary S. Michelfelder +3 more
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Latin American Journal of Sedimentology and Basin Analysis, 2006 In this work, the Rb-Sr and Sm-Nd methods were applied to fine-grained sedimentary rock samples of the Santa Maria Formation (Triassic, Paraná Basin) in order to have provenance informations.
Diogo Rodrigues Andrade Da Silva +4 more
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Trace element analysis of sound and decayed Norway spruce (Picea abies) by XRF and NAA methods.
Silva Fennica, 1979 Ashed tree samples from sound and decayed Norway spruce ( (L.) H. Karst.) were studied by means of fast neutron activation analysis, and for comparison, also by X-ray fluorescence analysis. In fast neutron activation analysis, the following elements were
Raunemaa, T. +5 more
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Latin American Journal of Sedimentology and Basin Analysis, 2021 In this work, the Rb-Sr and Sm-Nd methods were applied to fine-grained sedimentary rock samples of the Santa Maria Formation (Triassic, Paraná Basin) in order to have provenance information.
Diogo Rodrigues Andrade Da Silva +4 more
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Study of the mineralization potential of the intrusives around Valis (Tarom-Iran)
Earth Sciences Research Journal, 2014 The study area is located in northwestern Iran in the central Iran zone, specifically the western Alborz sub-zone south of the Tarom-Hashtjin metallogenic zone.
Mojtaba Bahajroy, Saeed Taki
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