Zobrazeno 1 - 10
of 89
pro vyhledávání: '"Juan Carlos Afonso"'
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 25, Iss 6, Pp n/a-n/a (2024)
Abstract The Archean Superior craton was formed by the assemblage of continental and oceanic terranes at ∼2.6 Ga. The craton is surrounded by multiple Proterozoic mobile belts, including the Paleoproterozoic Trans‐Hudson Orogen which brought toge
Externí odkaz:
https://doaj.org/article/03971704169c485cae91e57aecc6fe91
Publikováno v:
Geophysical Research Letters, Vol 51, Iss 2, Pp n/a-n/a (2024)
Abstract The formation of large igneous provinces (LIPs) has been widely believed to be linked to mantle plume activity. However, how the plume modifies the overlying lithosphere, particularly its compositional structure, remains uncertain. Here, we
Externí odkaz:
https://doaj.org/article/d140aa986f7940e48e5117453a441605
Autor:
Beñat Oliveira, William L. Griffin, Sarah E. M. Gain, Martin Saunders, Jeremy Shaw, Vered Toledo, Juan Carlos Afonso, Suzanne Y. O’Reilly
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
Abstract Aggregates of corundum crystals with skeletal to hopper morphology occur in pyroclastic rocks erupted from Cretaceous basaltic volcanoes on Mt Carmel, N. Israel. The rapid growth of the crystals trapped volumes of the parental Al2O3-supersat
Externí odkaz:
https://doaj.org/article/1e8a15b9cc2342f99d6e74569ccc1103
Autor:
Ajay Kumar, Manel Fernàndez, Ivone Jiménez‐Munt, Montserrat Torne, Jaume Vergés, Juan Carlos Afonso
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 21, Iss 3, Pp n/a-n/a (2020)
Abstract LitMod2D integrates geophysical and petrological data sets to produce the thermal, density, and seismic velocity structure of the lithosphere and upper mantle. We present a new LitMod2D_2.0 package with improvements focused on (i) updated an
Externí odkaz:
https://doaj.org/article/6c7c0466f7694738ac8eda339460c4a2
Seismic data from several long-running broadband sensors around the globe will be used to investigate the statistical significance and geologic interpretation of negative velocity discontinuities in the upper-most mantle. Several previous studies hav
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e60af7cf21febe8c44b68b0fe019733c
https://doi.org/10.5194/egusphere-egu23-4819
https://doi.org/10.5194/egusphere-egu23-4819
Autor:
Juan Carlos Afonso
The present-day thermochemical structure of the subcontinental mantle holds key information on its origin and evolution and informs exploration strategies, natural hazard management and evolutionary model of the Earth system. As such, unravelling the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1367168f3825328efbc85b51b999d09d
https://doi.org/10.5194/egusphere-egu23-14694
https://doi.org/10.5194/egusphere-egu23-14694
Autor:
María Constanza Manassero, Sinan Özaydin, Juan Carlos Afonso, Joshua Shea, Alison Kirkby, Isra Ezad, Stephan Thiel, Ilya Fomin, Karol Czarnota
The thermochemical structure of the lithosphere exerts control on melting mechanisms in the mantle as well as the location of volcanism and ore deposits. Imaging the complex interactions between the lithosphere and asthenospheric mantle requires the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ee69af19eb8ef73a669d51303e4293d
https://doi.org/10.31223/x5gd31
https://doi.org/10.31223/x5gd31
Publikováno v:
Geology.
The recycling of oceanic lithosphere into the deep mantle at subduction zones is one of the most fundamental geodynamic processes on Earth. During the closure of an ocean, ancient oceanic slabs are thought to be consumed entirely in subduction zones
Publikováno v:
Geochimica et Cosmochimica Acta. 315:251-275
The chemical composition of erupted basalts provides a record of the thermo-chemical state of their source region and the melting conditions that lead to their formation. Here we present the first probabilistic inversion framework capable of invertin
Autor:
Anqi Zhang, Y. John Chen, Heather Handley, Juan Carlos Afonso, Hongkun Dai, Zhen Guo, Yingjie Yang
Publikováno v:
Geology. 50:210-215
Northeast China hosts one of the largest Cenozoic intraplate volcanic regions in the world. However, the mechanisms that generate the volcanism, its spatial-temporal distribution, and compositional signatures remain highly debated due to the lack of