FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2122111202> ?p ?o ?g. }

• W2122111202 endingPage "288" @default.
• W2122111202 startingPage "265" @default.
• W2122111202 abstract "ABSTRACT Structural and topographic relief along the eastern margin of the Rio Grande rift, northern New Mexico, provides a remarkable cross-section through the 26-Ma Questa caldera and cogenetic volcanic and plutonic rocks of the Latir field. Exposed levels increase in depth from mid-Tertiary depositional surfaces in northern parts of the igneous complex to plutonic rocks originally at 3–5 km depths in the S. Erosional remnants of an ash-flow sheet of weakly peralkaline rhyolite (Amalia Tuff) and andesitic to dacitic precursor lavas, disrupted by rift-related faults, are preserved as far as 45 km beyond their sources at the Questa caldera. Broadly comagmatic 26 Ma batholithic granitic rocks, exposed over an area of 20 by 35 km, range from mesozonal granodiorite to epizonal porphyritic granite and aplite; shallower and more silicic phases are mostly within the caldera. Compositionally and texturally distinct granites define resurgent intrusions within the caldera and discontinuous ring dikes along its margins; a batholithic mass of granodiorite extends 20 km S of the caldera and locally grades vertically to granite below its flat-lying roof. A negative Bouguer gravity anomaly (15–20 mgal), which encloses exposed granitic rocks and coincides with boundaries of the Questa caldera, defines boundaries of the shallow batholith, emplaced low in the volcanic sequence and in underlying Precambrian rocks. Palaeomagnetic pole positions indicate that successively crystallised granitic plutons cooled through Curie temperatures during the time of caldera formation, initial regional extension, and rotational tilting of the volcanic rocks. Isotopic ages for most intrusions are indistinguishable from the volcanic rocks. These relations indicate that the batholithic complex broadly represents the source magma for the volcanic rocks, into which the Questa caldera collapsed, and that the magma was largely liquid during regional tectonic disruption. Volcanic and plutonic magmas (1) changed from early high-K calc-alkaline to alkalic prior to caldera eruptions; (2) differentiated to a weakly peralkaline rhyolite and equivalent acmiteartvedsonite granite cap (underlain by calc-alkaline granite) when the caldera formed at 26·5 Ma; then (3) reverted to calc-alkaline compositions. Concentrations of alkalis and minor elements such as Rb, Th, U, Nb, Zr, and Y reached maxima at the caldera stage. The volcanic rocks constitute intermittently quenched samples of upper parts of Questa magma bodies at early stages of crystallisation; in contrast, the comagmatic granitic rocks preserve an integrated record of protracted crystallisation of the magmatic residue as eruptions diminished. Multiple differentiation processes were active during evolution of the Questa magmatic system: crystal fractionation, replenishment by mantle and lower crustal melts of varying chemical and isotopic character, mixing of evolved with more primitive magmas, upper crustal assimilation, and perhaps volatile-transfer processes. As a result, an evolving batholithic cluster of coalesced magma chambers generated diverse assemblages of broadly cogenetic rocks within a few million years. Evolution of the Questa magmatic system and similar high-level Tertiary granitic batholiths nearby in the southern Rocky Mountains provides broad insights into magmatic processes in continental regions such as the overall shapes of batholiths, time and compositional relations between cogenetic volcanic and plutonic rocks, density equilibration of magmas with country rocks, and thermal evolution of continental crust." @default.
• W2122111202 created "2016-06-24" @default.
• W2122111202 creator A5090951456 @default.
• W2122111202 date "1988-01-01" @default.
• W2122111202 modified "2023-09-25" @default.
• W2122111202 title "Evolution of silicic magma in the upper crust: the mid-Tertiary Latir volcanic field and its cogenetic granitic batholith, northern New Mexico, U.S.A." @default.
• W2122111202 cites W1517792923 @default.
• W2122111202 cites W1595333992 @default.
• W2122111202 cites W1966619099 @default.
• W2122111202 cites W1969556320 @default.
• W2122111202 cites W1971762124 @default.
• W2122111202 cites W1973427626 @default.
• W2122111202 cites W1980491738 @default.
• W2122111202 cites W1984463945 @default.
• W2122111202 cites W1990153591 @default.
• W2122111202 cites W1991774187 @default.
• W2122111202 cites W1992849520 @default.
• W2122111202 cites W1998358801 @default.
• W2122111202 cites W1999829804 @default.
• W2122111202 cites W2001514994 @default.
• W2122111202 cites W2010531350 @default.
• W2122111202 cites W2012925962 @default.
• W2122111202 cites W2017364385 @default.
• W2122111202 cites W2020622617 @default.
• W2122111202 cites W2023270620 @default.
• W2122111202 cites W2027045658 @default.
• W2122111202 cites W2027362066 @default.
• W2122111202 cites W2033968507 @default.
• W2122111202 cites W2037910514 @default.
• W2122111202 cites W2040548650 @default.
• W2122111202 cites W2048545813 @default.
• W2122111202 cites W2052055789 @default.
• W2122111202 cites W2056915971 @default.
• W2122111202 cites W2063025747 @default.
• W2122111202 cites W2068671177 @default.
• W2122111202 cites W2071854266 @default.
• W2122111202 cites W2079793489 @default.
• W2122111202 cites W2086711061 @default.
• W2122111202 cites W2088121177 @default.
• W2122111202 cites W2097235629 @default.
• W2122111202 cites W2104144529 @default.
• W2122111202 cites W2106868408 @default.
• W2122111202 cites W2108971421 @default.
• W2122111202 cites W2112812807 @default.
• W2122111202 cites W2119443923 @default.
• W2122111202 cites W2123698291 @default.
• W2122111202 cites W2126593142 @default.
• W2122111202 cites W2136565500 @default.
• W2122111202 cites W2144287986 @default.
• W2122111202 cites W2146807312 @default.
• W2122111202 cites W2150624866 @default.
• W2122111202 cites W2157099954 @default.
• W2122111202 cites W2157562584 @default.
• W2122111202 cites W2167893737 @default.
• W2122111202 cites W2312340176 @default.
• W2122111202 cites W2325720183 @default.
• W2122111202 cites W2330697110 @default.
• W2122111202 cites W2473859908 @default.
• W2122111202 cites W2773194484 @default.
• W2122111202 cites W4256670726 @default.
• W2122111202 doi "https://doi.org/10.1017/s0263593300014279" @default.
• W2122111202 hasPublicationYear "1988" @default.
• W2122111202 type Work @default.
• W2122111202 sameAs 2122111202 @default.
• W2122111202 citedByCount "50" @default.
• W2122111202 countsByYear W21221112022012 @default.
• W2122111202 countsByYear W21221112022013 @default.
• W2122111202 countsByYear W21221112022014 @default.
• W2122111202 countsByYear W21221112022015 @default.
• W2122111202 countsByYear W21221112022016 @default.
• W2122111202 countsByYear W21221112022017 @default.
• W2122111202 countsByYear W21221112022019 @default.
• W2122111202 countsByYear W21221112022020 @default.
• W2122111202 countsByYear W21221112022021 @default.
• W2122111202 countsByYear W21221112022022 @default.
• W2122111202 countsByYear W21221112022023 @default.
• W2122111202 crossrefType "journal-article" @default.
• W2122111202 hasAuthorship W2122111202A5090951456 @default.
• W2122111202 hasConcept C104962623 @default.
• W2122111202 hasConcept C120806208 @default.
• W2122111202 hasConcept C127313418 @default.
• W2122111202 hasConcept C147645078 @default.
• W2122111202 hasConcept C151730666 @default.
• W2122111202 hasConcept C165205528 @default.
• W2122111202 hasConcept C172660882 @default.
• W2122111202 hasConcept C17409809 @default.
• W2122111202 hasConcept C183222429 @default.
• W2122111202 hasConcept C192241223 @default.
• W2122111202 hasConcept C25822816 @default.
• W2122111202 hasConcept C2779670319 @default.
• W2122111202 hasConcept C2779870107 @default.
• W2122111202 hasConcept C34122518 @default.
• W2122111202 hasConcept C42787717 @default.
• W2122111202 hasConcept C49708893 @default.
• W2122111202 hasConcept C5900021 @default.
• W2122111202 hasConcept C77928131 @default.
• W2122111202 hasConcept C9566828 @default.
• W2122111202 hasConceptScore W2122111202C104962623 @default.

• next