Results 51 to 60 of about 2,212 (216)

Synorogenic melting of mafic lower crust: constraints from geochronology, petrology and Sr, Nd, Pb and O isotope geochemistry of quartz diorites (Damara orogen, Namibia) [PDF]

open access: yes, 2002
Quartz diorites represent the earliest (ca. 540 Ma) and most primitive plutonic rocks in the Pan African Damara belt and they pre-date the main phase of high-T regional metamorphism.
S. Jung   +5 more
core   +2 more sources

Neural Networks and Multivariate Analysis Based on Geochemical Data to Determine Stone Provenance From Ancient Calabrian Quarries (Southern Italy)

open access: yesArchaeometry, EarlyView.
ABSTRACT This study shows an innovative approach to determine the origin of some Calabrian rocks quarried used in ancient times. Twenty‐five quarries, distributed in all the Calabrian provinces (Southern Italy), were studied and sampled. Ten samples were taken from each quarry, for a total of 250 samples.
Domenico Miriello   +5 more
wiley   +1 more source

NOBLE-METAL MINERALIZATION OF THE VÄLIMÄKI MASSIF, NORTHERN PRILADOZHJE, KARELIA

open access: yesTransactions of the Karelian Research Centre of the Russian Academy of Sciences, 2017
The 1.89 Ga Välimäki massif is located in the northern Lake Ladoga area (Priladozhje). It is differentiated from wehrlites and pyroxenites to highly alkaline gabbro and diorites.
Иван Александрович Алексеев   +3 more
doaj   +1 more source

Neoarchaean quartz diorites in the Jiefangyingzi area, Central Asian Orogenic Belt: geological and tectonic significance

open access: yes, 2015
Quartz diorite intrusions in the Jiefangyingzi area associated with deformed Palaeozoic rocks of the Palaeozoic Bainaimiao arc magmatic belt on the northern margin of the North China Craton (NCC) were studied to determine their age, chemical composition,
Kai Zhu (187434)   +3 more
core   +1 more source

TIMS Techniques for Measuring Strontium Isotope Ratios in Apatite Grains and Application to Igneous Rock Petrology

open access: yesRapid Communications in Mass Spectrometry, Volume 41, Issue 1, 15 January 2027.
ABSTRACT Rationale This study evaluates the potential of Sr isotopic compositions in apatite grains from magmatic rocks as a proxy for initial 87Sr/86Sr ratios, addressing the need for alternative approaches to conventional whole‐rock analyses in isotopic studies of granitoid systems.
Carla Neto   +9 more
wiley   +1 more source

GEOLOGY AND GEOCHEMISTRY OF SYNPLUTONIC DYKES IN THE CHELYABINSK GRANITOID MASSIF, SOUTH URALS

open access: yesГеодинамика и тектонофизика, 2017
We present the results of geological, petro‐geochemical and mineralogical studies of synplutonic intrusive formations in the Chelyabinsk granitoid massif, South Urals.
G. A. Kallistov, T. A. Osipova
doaj   +1 more source

Learning Across the Divide: Understanding Knowledge Sharing Through Petrographic Analysis on Ceramics From the Rhine‐Meuse Delta During the Middle to Late Neolithic Transition (3400–2200 bce)

open access: yesArchaeometry, Volume 68, Issue 6, Page 1251-1264, December 2026.
ABSTRACT Vlaardingen (VL) communities on the Dutch West coast (3400–2200 bce) are part of a unique, long‐term continuity in the European Neolithic. Despite large‐scale changes in European populations during the Neolithic, the genomic diversity and cultural practices of VL communities can be retraced to the Mesolithic.
Jisca de Bruin   +3 more
wiley   +1 more source

COMPOSITIONAL FEATURES OF THE EARLY PALEOZOIC GRANITOIDS OF THE PANGHAZJILGA COMPLEX, EASTERN PART OF THE CENTRAL PAMIR, TAJIKISTAN

open access: yesГеодинамика и тектонофизика
The Panghazjilga igneous complex in the eastern part of the Central Pamirs is one of the few Cambrian intrusive formations in the region. In our study, we address a number of questions that contribute to understanding the nature of the rocks in the ...
Sh. A. Odinaev   +7 more
doaj   +1 more source

Geochemical behavior of chromium in minerals of high-Mg rocks, associated with granitoid massifs of the Urals

open access: yesЛитосфера, 2019
Research subject. High-magnesium rocks associated with the granitoid massifs of the Urals are represented by gabbro-diorites and their melanocratic varieties (hornblendites), as well as by diorites and quartz diorites.
S. V. Pribavkin   +4 more
doaj   +1 more source

A Geophysical Crustal Model of Central Italy for Geoneutrino Predictions in Borexino

open access: yesEarth and Space Science, Volume 13, Issue 11, November 2026.
Abstract Predicting the geoneutrino signal at underground detectors requires a local crustal reference whose precision matches the experimental uncertainty. The current Borexino reference is 15 years old and deterministic. We replace it with GUESS, a probabilistic 3‐D model of the Gran Sasso region, built by Bayesian inversion of multi‐source ...
L. Rossi   +21 more
wiley   +1 more source

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