Results 41 to 50 of about 22,327 (143)
О возрасте щелочных гранитоидов магнитогорской габбро-гранитной серии
Литосфера, 2019 В статье приведены материалы изотопного датирования дайки риолит-порфиров, рассекающей щелочной гранитный массив горы Чека. Полученные данные по дайке риолит-порфиров 315 ± 5 млн. лет и 318 ± 5 млн. лет U-Pb методом по цирконам и 305 ± 7.4 млн.
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A virtual Rb-Sr isochron for an open system.
GEOCHEMICAL JOURNAL, 1974 A linear isochron can be obtained even for an open system. The gradient of this “virtual isochron”, however, is different from that of “true isochron”.
openaire +2 more sources
In situ Rb-Sr dating of slickenfibres in deep crystalline basement faults. [PDF]
Sci Rep, 2020 Tillberg M +5 more
europepmc +1 more source
On the viability of detrital Rb-Sr geochronology
Re-examination of sediment samples collected from the Bay of Bengal via laser-ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) Rb-Sr geochronology demonstrates the viability of the Rb-Sr system for use as a detrital chronometer. The age population defined by the Rb-Sr dates essentially reproduces that previously published for detrital ...
Kyle P Larson +4 more
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Bulletin of the Mineral Research and Exploration, 2013 Ankara’nın yaklaşık 50-60 km güneybatısında yer alan erken Miyosen yaşlı Oyaca, Kedikayası ve Boyalık dasitleri adakit ve/veya adakitik kayaçlara benzer özelliklere sahiptir.
Pınar ŞEN, Erdal ŞEN
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Rb-Sr Systematics of the Ungrouped Achondrites [PDF]
Goldschmidt Abstracts, 2020 Evgenii Krestianinov, Yuri Amelin
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Литосфера, 2019 Приведены результаты геохимических исследований щелочных сиенитов и гранитов Хушагольского массива, насчитывавшего не менее пяти магматических эпизодов во временном интервале от среднего кембрия до начала позднего карбона (512–319 млн. лет).
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ORIGEM, SIGNIFICADO PETROGENÉTICO E IDADE DOS ORTOGNAISSES TERRA NOVA: REGISTRO DE MAGMATISMO ALCALINO EXTENSIONAL NEOPROTEROZOICO NO DOMÍNIO DA ZONA TRANSVERSAL DA PROVÍNCIA BORBOREMA [PDF]
Geochimica Brasiliensis, 2016 Os ortognaisses sieníticos de Terra Nova ocorrem encaixados na Faixa Feira Nova do Complexo Vertentes, no extremo leste do terreno Rio Capibaribe da Província Borborema, Nordeste do Brasil.
Haroldo Monteiro Lima +4 more
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Rb-Sr constraints on the age of Moon formation
IcarusDetermining the age of the Moon, which is commonly considered as the termination of Earth accretion has been a complex challenge for geochronology. A number of methods have been used to delineate the age of the Moon based either on absolute chronology of lunar rocks or have relied on more indirect methods using short-lived nuclides such as 182Hf that ...
Yobregat, Elsa +2 more
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Solid Earth SciencesThis study presents radiogenic Sr–Nd isotopic compositions of eighteen geological Chinese reference materials (RMs) measured on TIMS and MC-ICP-MS independently.
Wenke Wang +5 more
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