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- W2093683537 abstract "Ring‐fracture rhyolites of the Valles Caldera (VC) were examined to determine the evolution of the magma system following eruption of the upper Bandelier Tuff (UBT) and subsequent caldera collapse. Volcanism began with eruption of Deer Canyon (DC), Redondo Creek, and Del Medio (DM) rhyolites during the interval 1140–1133 ka. Quartz δ 18 O for the UBT, (average +8.3 ‰), DC (+7.9 ‰), and DM (+8.7 ‰) rhyolites indicate no significant lowering of δ 18 O following caldera collapse. In contrast, DM rhyolites record low ϵ Nd of −3.6 to −3.8 relative to the UBT (−2.7) and variable initial 87 Sr/ 86 Sr (0.70923–0.71307). Del Abrigo (DA) and Santa Rosa I rhyolites (973–915 ka) exhibit lower ϵ Nd (−4.4 to −4.6) and initial 87 Sr/ 86 Sr (0.70707–0.71009), as well as shifts in compatible and incompatible trace element ratios. Seco, San Luis, and Santa Rosa II rhyolites (800–787 ka) have ϵ Nd (−4.0 to −4.3) similar to the 973 to 915 ka rhyolites but lower initial 87 Sr/ 86 Sr (0.70616–0.70747). After a hiatus of 230 ka, San Antonio (SA), South Mountain (SM), and La Jara (LJ) rhyolites (557–521 ka) were erupted with ϵ Nd of −3.7 to −4.3, distinctly lower initial 87 Sr/ 86 Sr of 0.70513–0.70553 and less evolved trace element compositions. The youngest rhyolites, the El Cajete‐Banco Bonito group (EC‐BB) (300–170 ka) are petrographically and geochemically distinct with the highest ϵ Nd (−2.7 to −3.0) and the lowest initial 87 Sr/ 86 Sr (0.70464–0.70478) of postcollapse rhyolites. The isotopic data indicate that Valles rhyolites are not direct melts of Proterozoic basement (ϵ Nd of −10 to −15) and indicate a significant mantle‐derived (basaltic) component. Elevated initial 87 Sr/ 86 Sr is restricted to rhyolites depleted in Sr (<10 ppm) and probably reflects minor upper crustal assimilation. Calculated magma δ 18 O values (+6.6 to +7.0 ‰) indicate no substantial supracrustal sediment in the source region, nor interaction with hydrothermal fluids (or altered wall rock) in the upper crust. The intermittent volcanic activity and the heterogeneity of petrographic, geochemical, and isotopic compositions from one eruptive interval to the next suggests that these rhyolites were vented from a series of temporally and spatially separated magma chambers. Parental melts supplied to these magma chambers were most probably produced by basalt‐induced fusion events in a hybridized deep crustal environment." @default.
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- W2093683537 date "1993-11-10" @default.
- W2093683537 modified "2023-09-27" @default.
- W2093683537 title "Isotopic and geochemical constraints on the origin and evolution of postcollapse rhyolites in the Valles Caldera, New Mexico" @default.
- W2093683537 cites W1966775689 @default.
- W2093683537 cites W1969497242 @default.
- W2093683537 cites W1969525191 @default.
- W2093683537 cites W1976028235 @default.
- W2093683537 cites W1982118449 @default.
- W2093683537 cites W1983596468 @default.
- W2093683537 cites W1983714152 @default.
- W2093683537 cites W1986541024 @default.
- W2093683537 cites W1989491939 @default.
- W2093683537 cites W1990153591 @default.
- W2093683537 cites W1993637539 @default.
- W2093683537 cites W1995092116 @default.
- W2093683537 cites W1995137849 @default.
- W2093683537 cites W1997550903 @default.
- W2093683537 cites W1999294213 @default.
- W2093683537 cites W2001754765 @default.
- W2093683537 cites W2004418494 @default.
- W2093683537 cites W2005107294 @default.
- W2093683537 cites W2011628532 @default.
- W2093683537 cites W2014333968 @default.
- W2093683537 cites W2019537957 @default.
- W2093683537 cites W2024575502 @default.
- W2093683537 cites W2027713520 @default.
- W2093683537 cites W2029677847 @default.
- W2093683537 cites W2030643444 @default.
- W2093683537 cites W2032735745 @default.
- W2093683537 cites W2034937042 @default.
- W2093683537 cites W2036177335 @default.
- W2093683537 cites W2038213764 @default.
- W2093683537 cites W2039099919 @default.
- W2093683537 cites W2039239326 @default.
- W2093683537 cites W2045231900 @default.
- W2093683537 cites W2045471139 @default.
- W2093683537 cites W2045910164 @default.
- W2093683537 cites W2046961523 @default.
- W2093683537 cites W2047364329 @default.
- W2093683537 cites W2049141486 @default.
- W2093683537 cites W2049732609 @default.
- W2093683537 cites W2050053288 @default.
- W2093683537 cites W2052020789 @default.
- W2093683537 cites W2053118559 @default.
- W2093683537 cites W2062262750 @default.
- W2093683537 cites W2062637556 @default.
- W2093683537 cites W2062890233 @default.
- W2093683537 cites W2066451952 @default.
- W2093683537 cites W2067505690 @default.
- W2093683537 cites W2068202901 @default.
- W2093683537 cites W2069342962 @default.
- W2093683537 cites W2069971750 @default.
- W2093683537 cites W2073671350 @default.
- W2093683537 cites W2076024715 @default.
- W2093683537 cites W2076085026 @default.
- W2093683537 cites W2077124622 @default.
- W2093683537 cites W2084298141 @default.
- W2093683537 cites W2092830972 @default.
- W2093683537 cites W2093283104 @default.
- W2093683537 cites W2095169023 @default.
- W2093683537 cites W2100859764 @default.
- W2093683537 cites W2104144529 @default.
- W2093683537 cites W2104609449 @default.
- W2093683537 cites W2107107093 @default.
- W2093683537 cites W2119893743 @default.
- W2093683537 cites W2136565500 @default.
- W2093683537 cites W2138621242 @default.
- W2093683537 cites W2145604970 @default.
- W2093683537 cites W2148006183 @default.
- W2093683537 cites W2156321503 @default.
- W2093683537 cites W2167893737 @default.
- W2093683537 cites W2169997237 @default.
- W2093683537 cites W2316472930 @default.
- W2093683537 cites W2343280464 @default.
- W2093683537 cites W2464469431 @default.
- W2093683537 cites W2912020849 @default.
- W2093683537 cites W4233627796 @default.
- W2093683537 cites W4234066087 @default.
- W2093683537 cites W4245638129 @default.
- W2093683537 doi "https://doi.org/10.1029/93jb01569" @default.
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