Results 61 to 70 of about 29,761 (295)

Long‐Term Storage of Meteoric Water in the Variscan Basement: Stable Isotope Constraints (δD–δ18O)

Terra Nova, EarlyView.
ABSTRACT F‐Ba‐Pb‐Zn (±Ag) deposits near the unconformity between the Armorican and Aquitaine basins formed by mixing surface waters and brines with fluid ascending from the basement. To better constrain the source of this fluid and the conditions of mixing, we analyzed the hydrogen (δDwater) and oxygen (δ18Owater) isotopic composition of water trapped ...
Loïc Bouat, Pierre Strzerzynski, Véronique Gardien   +2 more
wiley   +1 more source

Paleomagnetism and rock magnetism as tools for volcanology [PDF]

, 2022
Geoffrey A. Lerner, E. J. Piispa, J. A. Bowles, Michael H. Ort   +3 more
openalex   +1 more source

Dating C/S Structures in Syntectonic Granites by In Situ Rb‐Sr Analyses on Muscovite

Terra Nova, EarlyView.
ABSTRACT The interplay of crystallisation, deformation and fluid–rock interactions makes deciphering geochronological information complex in syntectonic granites. In this study, we apply in situ Rb‐Sr analyses to selected samples from the Questembert Variscan syntectonic granite in Western France, which was emplaced along the South Armorican Shear Zone
Philippe Boulvais, Romain Tartèse
wiley   +1 more source

Volcanology of Recent Oceanic Active Island [PDF]

, 2022
William Hernández Ramos, Víctor Ortega, Monika Przeor, Nemesio M. Pérez, Pedro A. Hernández   +4 more
openalex   +1 more source

3D Quantification of Subsidence During Pyrenean Retro‐Wedge Initiation: Role of Structural and Thermal Inheritance on Hyperextended Margin Inversion (Aquitaine Basin)

Terra Nova, EarlyView.
ABSTRACT We present novel 3D subsidence data enabling vertical movements' quantification during the early formation of the Pyrenean retro‐wedge. From Cenomanian to Turonian times, subsidence is relatively low (~26 ± 10 m/Myr), corresponding to a brief 10 Myr thermal re‐equilibration of the European lithosphere following the hyperextended rift episode ...
Benoit Issautier, Nicolas Saspiturry, Paul Angrand, Eric Lasseur, Simon Andrieu, Cécile Robin   +5 more
wiley   +1 more source

Volcanology of Ischia (Italy)

Journal of Maps, 2018
A volcanological map of the active Ischia volcanic field that includes Vivara Island is presented. The volcanological map is at the 1:10,000 scale and is based on 1:5000 field mapping, geological CAR.G data, and new volcanological studies. Geological data
Alessandro Sbrana, Paola Marianelli, Giuseppe Pasquini   +2 more
doaj   +1 more source

New magnetotelluric soundings in the Mt. Somma-Vesuvius volcanic complex: preliminary results

Annals of Geophysics, 2000
During 1997 ten magnetotelluric (MT) soundings were recorded in single-site mode above the Mt. Somma-Vesuvius volcanic area. A first campaign of MT measurements was carried out, during spring, by the researchers of the University of Padua with their MSPM
A. Zaja, G. Volpi, A. Manzella
doaj   +1 more source

The 3D Attenuation Structure of Deception Island (Antarctica) [PDF]

, 2016
Peer ...
De Siena, Luca, Del Pezzo, Edoardo, Diaz-Moreno, Alejandro, Garcia-Yeguas, Araceli, Ibanez, Jesus, Prudencio, Janire   +5 more
core   +1 more source

Subcritical Cracking Associated With Subgrain Rotation Recrystallisation in Quartz Inferred From Cathodoluminescence Study

Terra Nova, EarlyView.
ABSTRACT We employed cathodoluminescence (CL) to study deformed quartz phenocrysts from the Cretaceous granite porphyry in SW Japan and observed fracture‐like planar structures appearing as CL‐dark bands. These CL‐dark bands were aligned with low‐angle grain boundaries formed by subgrain rotation recrystallisation.
Takuro Yoshioka, Takamoto Okudaira, Hideo Takagi   +2 more
wiley   +1 more source

Efficacy of Assessing Magmatic Storage Depth Using Natural Samples, Experiments and Thermodynamic Models: A Case Study From Valles Caldera, NM (USA)

Geochemistry, Geophysics, Geosystems
Estimates of magmatic storage are typically made using mineral assemblages in natural samples, experiments and thermodynamic models (e.g., MELTS), where each method has limitations.
Magdalen A. Grismer, Laura E. Waters, Gordon M. Moore, Gabriela A. Farfan   +3 more
doaj   +1 more source