Results 91 to 100 of about 18,299,024 (255)

Magmatic ocean-continent transitions

open access: yes, 2019
Continental extension may, or may not, be coeval with significant mantle melting, leading to the formation of distinct types of passive margins (respectively magma-poor or volcanic), with distinct crustal structures.
Guan, Huixin   +11 more
core   +1 more source

Electron probe microanalysis of extremely fine‐grained tephras: new protocols and insights for analyses at the 1 μ ${\rm{\mu }}$m scale

open access: yesJournal of Quaternary Science, EarlyView.
ABSTRACT Volcanic ash (tephra) provides an important chronostratigraphic framework for correlating Quaternary records. In ultra‐distal ( > $\gt $1500 km) settings such as ice cores and marine sediments, deposits are typically preserved as cryptotephra composed of glass shards ≤ 20 μ $\le 20\,\mu
Celeste Smith   +6 more
wiley   +1 more source

Carbon isotope geochemistry of organic matter in volcanic paleosols constrains paleo‐environmental variations

open access: yesJournal of Quaternary Science, EarlyView.
ABSTRACT The Fiorano quarry paleosol developed within the Colli Albani volcanic district (Italy) in the time interval bracketed by the deposition of the Pozzolanelle pyroclastic‐flow unit (365 ± 4 ka) and the emplacement of the Capo di Bove lava flow (277 ± 2 ka).
Eduardo Di Marcantonio   +4 more
wiley   +1 more source

The protracted development of focused magmatic intrusion during continental rifting [PDF]

open access: yes, 2014
The transition from mechanical thinning toward focused magmatic intrusion during continental rifting is poorly constrained; the tectonically active Main Ethiopian Rift (MER) provides an ideal study locale to address this issue.
Ayalew, Dereje   +10 more
core   +1 more source

The Hidden Harvest: Harnessing Colorado's Geodiversity and Environmental Heterogeneity for Sustainable Agritourism

open access: yesSustainable Development, EarlyView.
ABSTRACT Colorado's geologic, pedologic, topographic, hydrological, and climatic contrasts create strong but under‐synthesized opportunities for sustainable agritourism. This review investigates how geodiversity, and the broader environmental heterogeneity within which it operates, can be used to diversify farm income, strengthen place‐based visitor ...
Bonface O. Manono
wiley   +1 more source

Ore-magmatic systems of Eastern Donbass

open access: yesГеология и геофизика Юга России, 2023
Статья посвящена решению одной из научных проблем металлогении Восточного Донбасса, определяющей связь рудных проявлений с магматизмом. Актуальность исследования. В практическом отношении и в научном плане Восточный Донбасс всегда изучался в основном как угленосный бассейн.
openaire   +1 more source

Microplate Tectonics Through Earth History and Across Solid Multispheres

open access: yesGeological Society of China Bulletin, EarlyView.
The evolution of tectonic microplates throughout Earth´s history as well as the transitions between microplates across different solid spheres offers a novel approach to expanding the traditional plate tectonics theory. ABSTRACT The evolution of tectonic microplates throughout Earth's history as well as the transitions between microplates across ...
Sanzhong Li   +29 more
wiley   +1 more source

Mortars From Punic and Hellenistic–Roman Solunto: Materials, Formulations, and Technology

open access: yesArchaeometry, EarlyView.
ABSTRACT This study presents an archaeometric investigation of 18 hydraulic rendering and bedding mortars from Punic and Hellenistic–Roman Solunto (NW Sicily). The research aimed to characterize raw materials, reconstruct manufacturing sequences, and evaluate technological proficiency through mineralogical and petrochemical analyses.
G. Montana   +4 more
wiley   +1 more source

Tracking the transition from magmatic to post-crystallization environment in the Sesia Magmatic System (Italy) by coupling quartz OH-defects and trace element analyses

open access: yes
The production of a significant thermal and fluid anomaly during the assembly of large magmatic bodies inevitably leads to a prolonged, post-magmatic evolution of the system.
D. Lenaz   +11 more
core   +1 more source

Electron microprobe and LA-ICP-MS data of melt inclusions, volcanic glass, magmatic sulphides and Fe-Ti oxides from Brothers volcano, Kermadec arc (SONNE cruise SO135)

open access: yes, 2020
Most magmatic-hydrothermal Cu deposits are genetically linked to arc magmas. However, most continental or oceanic arc magmas are barren, and hence new methods have to be developed to distinguish between barren and mineralised arc systems.
Bach, Wolfgang   +5 more
core   +1 more source

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