FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2015784856> ?p ?o ?g. }

• W2015784856 endingPage "1286" @default.
• W2015784856 startingPage "1260" @default.
• W2015784856 abstract "Alkaline magmas along the periphery of Sierra de San Carlos-Cruillas and Sierra de Tamaulipas (Eastern Alkaline Province, northeast Mexico) contain ultramafic xenoliths. Most of the host rocks are mafic (e.g., basalts, basanites, trachybasalts, phonotephrites), and have geochemical characteristics of nearly primary magmas generated in subcontinental zones (SiO2 = 42.6-48.4%, MgO = 6.3-11.2%, Mg# = 59.2-69.7). MORB-normalized patterns are similar to those displayed by extensionrelated mafic magmas. This hypothesis is supported by an enrichment in light REE ([La/Yb]N = 10.8-27.1; chondrite-normalized ratios) and the behavior of relatively immobile trace elements. Using a partial melting model for REE, the source for the mafic magmas apparently was in the garnet P-T stability field. On the other hand, peralkaline phonolites and tephriphonolites (SiO2 = 52.9-54.1%, MgO = 1.5-1.8%, Mg# = 33.1-39.8) also contain mantle xenoliths. These evolved magmas show MORB-normalized multi-element diagrams characterized by enrichment in highly incompatible elements (e.g., Rb, Sr, Ba) and positive anomalies for HFSE. Ultramafic xenoliths are predominantly protogranular spinel-lherzolites as well as harzburgites and rare dunites, websterites, and wherlites. A few samples display transitional and porphyroclastic textures, indicating that the xenoliths were carried to the surface from stable mantle zones with little or no deformation. The mineralogy (olivine + orthopyroxene + clinopyroxene ± spinel) of xenoliths contained in mafic magmas is typical of unaltered mantle nodules. However, small garnet crystals exhibiting disequilibrium textures occur in one sample. The core and rim compositions in olivine range from Fo90 to Fo94, whereas orthopyroxenes are characterized by En88-93 and clinopyroxenes by En44-51Fs3-10Wo43-50. Chromiferous spinels have Mg/(Mg + Fe+2) = 0.76-0.83 and Cr/(Cr + Al) = 0.10-0.25. In comparison to the nodules contained in mafic magmas, mantle xenoliths included in phonolitic liquids show some differences: (1) smaller size (diameter < 1 cm); (2) clinopyroxene is less common (< 5% volume) and spinel is absent; and (3) partial alteration to micaceous minerals. Equilibrium temperatures for mantle xenoliths contained in mafic magmas range from 850 to 1170°C, as calculated applying different geothermometers, whereas mantle nodules sampled by peralkaline liquids show only lower equilibrium temperatures (<900°C). A first approximation to equilibrium pressure, based on mineralogical constrains, indicates values from 10 to 25 kbar. Summing up, we consider that the mafic magmas were generated within the spinel-garnet domain of the lithospheric mantle, having little or no interaction with their wall rocks. The ultramafic xenoliths were probably sampled during magma ascent above its source. In contrast, the geochemistry of phonolitic rocks and their altered mantle xenoliths reveal that such magmas cannot be explained by direct mantle melting. The petrogenesis of these peralkaline magmas can be described by a two-step model: (1) partial melting of metasomatized mantle which produced an alkaline magma enriched in LILE and HFSE; and (2) subsequent fractional crystallization of this magma at upper mantle pressures, producing phonolites. While ascending, the peralkaline magmas sampled altered nodules in a shallow level of the subcontinental mantle. The rise and eruption of the mantle-bearing mafic and evolved magmas were facilitated by the post-Laramide extensional regime established during Tertiary time in northeast Mexico." @default.
• W2015784856 created "2016-06-24" @default.
• W2015784856 creator A5040186249 @default.
• W2015784856 creator A5045673205 @default.
• W2015784856 creator A5055715665 @default.
• W2015784856 creator A5091546815 @default.
• W2015784856 date "2005-12-01" @default.
• W2015784856 modified "2023-09-28" @default.
• W2015784856 title "Mantle Xenoliths and Their Host Magmas in the Eastern Alkaline Province, Northeast Mexico" @default.
• W2015784856 cites W1672405186 @default.
• W2015784856 cites W1969038051 @default.
• W2015784856 cites W1971201704 @default.
• W2015784856 cites W1978647071 @default.
• W2015784856 cites W1980463502 @default.
• W2015784856 cites W1981054075 @default.
• W2015784856 cites W1985957692 @default.
• W2015784856 cites W1991528680 @default.
• W2015784856 cites W1991848112 @default.
• W2015784856 cites W1997427942 @default.
• W2015784856 cites W2000682950 @default.
• W2015784856 cites W2010670533 @default.
• W2015784856 cites W2012017496 @default.
• W2015784856 cites W2014828526 @default.
• W2015784856 cites W2017941972 @default.
• W2015784856 cites W2018049973 @default.
• W2015784856 cites W2018050219 @default.
• W2015784856 cites W2021550400 @default.
• W2015784856 cites W2022316305 @default.
• W2015784856 cites W2027862110 @default.
• W2015784856 cites W2032108554 @default.
• W2015784856 cites W2046164395 @default.
• W2015784856 cites W2050247863 @default.
• W2015784856 cites W2054161635 @default.
• W2015784856 cites W2054578927 @default.
• W2015784856 cites W2054794807 @default.
• W2015784856 cites W2058190804 @default.
• W2015784856 cites W2062775553 @default.
• W2015784856 cites W2063369535 @default.
• W2015784856 cites W2067112977 @default.
• W2015784856 cites W2069192479 @default.
• W2015784856 cites W2070010637 @default.
• W2015784856 cites W2071097585 @default.
• W2015784856 cites W2074774101 @default.
• W2015784856 cites W2078840355 @default.
• W2015784856 cites W2079488564 @default.
• W2015784856 cites W2083174419 @default.
• W2015784856 cites W2083276864 @default.
• W2015784856 cites W2091995629 @default.
• W2015784856 cites W2094004015 @default.
• W2015784856 cites W2095016743 @default.
• W2015784856 cites W2103788137 @default.
• W2015784856 cites W2104035671 @default.
• W2015784856 cites W2110535686 @default.
• W2015784856 cites W2112435406 @default.
• W2015784856 cites W2127203865 @default.
• W2015784856 cites W2141890535 @default.
• W2015784856 cites W2142842001 @default.
• W2015784856 cites W2145191782 @default.
• W2015784856 cites W2157099954 @default.
• W2015784856 cites W2334502986 @default.
• W2015784856 cites W2334608288 @default.
• W2015784856 cites W2340385011 @default.
• W2015784856 cites W2342492932 @default.
• W2015784856 cites W2470565841 @default.
• W2015784856 cites W2907409562 @default.
• W2015784856 cites W4242624273 @default.
• W2015784856 cites W4255074029 @default.
• W2015784856 cites W4297677661 @default.
• W2015784856 doi "https://doi.org/10.2747/0020-6814.47.12.1260" @default.
• W2015784856 hasPublicationYear "2005" @default.
• W2015784856 type Work @default.
• W2015784856 sameAs 2015784856 @default.
• W2015784856 citedByCount "8" @default.
• W2015784856 countsByYear W20157848562022 @default.
• W2015784856 countsByYear W20157848562023 @default.
• W2015784856 crossrefType "journal-article" @default.
• W2015784856 hasAuthorship W2015784856A5040186249 @default.
• W2015784856 hasAuthorship W2015784856A5045673205 @default.
• W2015784856 hasAuthorship W2015784856A5055715665 @default.
• W2015784856 hasAuthorship W2015784856A5091546815 @default.
• W2015784856 hasConcept C127313418 @default.
• W2015784856 hasConcept C161509811 @default.
• W2015784856 hasConcept C167284885 @default.
• W2015784856 hasConcept C17409809 @default.
• W2015784856 hasConcept C195081551 @default.
• W2015784856 hasConcept C2780364934 @default.
• W2015784856 hasConcept C42796848 @default.
• W2015784856 hasConcept C67236022 @default.
• W2015784856 hasConcept C79572550 @default.
• W2015784856 hasConcept C84372278 @default.
• W2015784856 hasConceptScore W2015784856C127313418 @default.
• W2015784856 hasConceptScore W2015784856C161509811 @default.
• W2015784856 hasConceptScore W2015784856C167284885 @default.
• W2015784856 hasConceptScore W2015784856C17409809 @default.
• W2015784856 hasConceptScore W2015784856C195081551 @default.
• W2015784856 hasConceptScore W2015784856C2780364934 @default.
• W2015784856 hasConceptScore W2015784856C42796848 @default.
• W2015784856 hasConceptScore W2015784856C67236022 @default.

• next