Results 31 to 40 of about 9,710 (277)

Evolution of the volcanic plumbing systemof Alicudi (Aeolian Islands - Italy): evidence from fluid and melt inclusionsin quartz xenoliths

Annals of Geophysics, 2004
Quartz-rich xenoliths in lavas (basalts to andesites; 90-30 ka) from Alicudi contain abundant melt and fluid inclusions. Two generations of CO2-rich fluid inclusions are present in quartz-rich xenolith grains: early (Type I) inclusions related to partial
A. Peccerillo, V. Zanon, M. L. Frezzotti, R. Bonelli   +3 more
doaj   +1 more source

Deep crustal electromagnetic structure of Bhuj earthquake region (India) and its implications [PDF]

, 2010
The existence of fluids and partial melt in the lower crust of the seismically active Kutch rift basin (on the western continental margin of India) owing to underplating has been proposed in previous geological and geophysical studies. This hypothesis is
Ledo Fernández, Juan José, LEDO FERNÁNDEZ, J., Ledo, Juan José, Queralt, Pilar, Queralt, P., Naganjaneyulu, K., Ledo Fernández, Juanjo, Queralt i Capdevila, Pilar   +7 more
core   +1 more source

Sr-Nd-Hf Isotopic Disequilibrium During the Partial Melting of Metasediments: Insight From Himalayan Leucosome

Frontiers in Earth Science, 2022
Radiogenic isotopes of granitoids are widely applied to fingerprint the source of granitoids and study the magma mingling and assimilation processes, aiming to decipher the planetary differentiation.
Lei Yang, Lei Yang, Lei Yang, Jia-Min Wang, Xiao-Chi Liu, Gautam P. Khanal, Gautam P. Khanal, Fu-Yuan Wu, Fu-Yuan Wu   +8 more
doaj   +1 more source

Detrital Zircons U-Pb Age and Hf Isotope from the Western Side of the Taiwan Strait: Implications for Sediment Provenance and Crustal Evolution of the Northeast Cathaysia Block

Terrestrial, Atmospheric and Oceanic Sciences, 2014
In situ detrital zircons U-Pb and Hf isotope analyses from the Min and Jiulong River of Southeast China were carried out to identify sediment provenance and crustal evolution of the northeast Cathaysia Block.
Yonghang Xu, Qinqin Sun, Liang Yi, Xijie Yin, Aijun Wang, Yunhai Li, Jian Chen   +6 more
doaj   +1 more source

Channelized melt flow in downwelling mantle: Implications for 226Ra-210Pb disequilibria in arc magmas [PDF]

, 2008
We present the results of an analytical model of porous flow of viscous melt into a steadily dilating ‘‘channel’’ (defined as a cluster of smaller veins) in downwelling subarc mantle.
Koenders, M. A., Petford, Nick; id_orcid, Koenders, M.A., Petford, N., Turner, S, Petford, Nick, Turner, S., Koenders, M A   +7 more
core   +1 more source

Cambro–Ordovician ferrosilicic magmatism along the northern Gondwana margin: constraints from the Cézarenque–Joyeuse gneiss complex (French Massif Central)

BSGF - Earth Sciences Bulletin, 2022
It is well-acknowledged that the northern margin of the Gondwana supercontinent was affected by a major magmatic event at late Cambrian (Furongian) to early Ordovician (Tremadocian–Floian) times. However, an accurate assessment of its extent, origin, and
Couzinié Simon, Bouilhol Pierre, Laurent Oscar, Grocolas Thomas, Montel Jean-Marc   +4 more
doaj   +1 more source

Complex Crustal Deformation Beneath the Cathaysia Block in South China: Evidence From Receiver Function Analysis

Earth and Space Science, 2023
By harmonically fitting the arrival times of the P‐to‐S converted phases from the Moho, we systematically investigate the crustal anisotropy beneath the Cathaysia Block (CaB) and the surrounding areas in South China for the first time.
Mengkui Li, Shuangxi Zhang, Yu Wei, Chen Xu   +3 more
doaj   +1 more source

Thermal Constraints on the Longevity, Depth, and Vertical Extent of Magmatic Systems

Geochemistry, Geophysics, Geosystems, 2021
Magmatic regions are typically viewed as vertical systems, with magma coming in the bottom and either freezing in the crust to form plutons or erupting to form volcanic rocks.
Allen F. Glazner
doaj   +1 more source

Insight into volcanic garnet: origin and significance of garnet as exemplified by a detailed petro-mineralogical study of the Breziny andesite (Central Slovakia Volcanic Field, Western Carpathians, Central Europe)

Volcanica, 2021
Almandine-rich garnets from a Neogene andesite of Slovakia can be divided into two main types. Garnet megacrysts are magmatic and form a chemically homogeneous group that contains, on average, about 5 wt% CaO and 4.5 wt% MgO as petrogenetically ...
Jacky Bouloton
doaj   +1 more source

Poly-Orogenic Melting of Metasedimentary Crust From a Granite Geochemistry and Inherited Zircon Perspective (Southern Calabria-Peloritani Orogen, Italy)

Frontiers in Earth Science, 2019
Inherited zircon ages and geochemical features of late Cadomian and late Variscan granitoids from the north-eastern Peloritani Mountains (NE Sicily) and the western Aspromonte Massif (SW Calabria) shed new light on the sources and processes involved in ...
Patrizia Fiannacca, Ian S. Williams, Rosolino Cirrincione, Antonino Pezzino   +3 more
doaj   +1 more source