Development of a Continental Volcanic Field: Petrogenesis of Pre-caldera Intermediate and Silicic Rocks and Origin of the Bandelier Magmas, Jemez Mountains (New Mexico, USA)

Rowe, Michael C.; Wolff, J. A.; Gardner, Jamie N.; Ramos, Frank C.; Teasdale, Rachel; Heikoop, C. E.

doi:10.1093/petrology/egm050

Cited by 32 publications

(46 citation statements)

References 71 publications

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“…Most of the 9-10 Ma volcanic rocks in the southern Jemez Mountains are basalt, basaltic trachyandesite, andesite, trachyandesite, or rhyolite in composition (Rowe et al, 2007), but units with dacitic compositions also erupted during this time frame, especially in upper La Jara Canyon . Justet (2003) determined 40 Ar/ 39 Ar ages of 8.96 ± 0.06 Ma and 9.16 ± 0.07 Ma (P20 and P30, Table 2) for an aerially extensive Paliza Canyon Formation trachyandesite fl ow between Paliza Canyon and Hondo Canyon that caps southwest-dipping Paliza Canyon Formation basalt fl ows and intercalated volcaniclastic sediments.…”

Section: Southern Jemez Mountainsmentioning

confidence: 97%

“…The crystal-rich dacite exposed along the Rio del Oso and on the north side of Los Cerritos along Forest Road 144 (LCe, Fig. 2) contains plagioclase laths 1-2 cm across and quartz phenocrysts, superfi cially resembling lavas of the younger Tschicoma Formation (Bailey et al, 1969;Goff et al, 1989); however, the Rio del Oso fl ows are chemically and chronologically more similar to Lobato Formation (Rowe et al, 2007;Kelley et al, 2007a). We determined a biotite fusion 40 Ar/ 39 Ar age of 10.45 ± 0.05 Ma (20, (Gardner, 1985;Goff et al, 1989).…”

Section: Northeastern Jemez Mountainsmentioning

confidence: 99%

“…Based on available age and geochemical data (Singer, 1985;Justet, 2003;Rowe et al, 2007), the fl ows likely originated from Encino Point. The fl ows preserved on these mesas were erupted within a short time interval between 7.7 and 7.9 Ma, based on K-Ar ages of Manley and Mehnert (1981) and 40 Ar/ 39 Ar ages (P67-P68, Table 2) of Justet (2003) and Maldonado and Miggins (2007).…”

Section: Northwestern Jemez Mountainsmentioning

confidence: 99%

“…Barrancones Hill is a hornblende-biotitebearing trachyte to dacite (Lawrence, 1979;Lawrence et al, 2004;Rowe et al, 2007). No age data are available for this dome.…”

Section: Miocene Santa Fe Groupmentioning

confidence: 99%

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Spatial and temporal trends in pre-caldera Jemez Mountains volcanic and fault activity

et al. 2013

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New 40 Ar/ 39 Ar dates from the Jemez Mountain volcanic fi eld (JMVF) reveal formerly unrecognized shifts in the loci of pre-caldera volcanic centers across the northern Jemez Mountains; these shifts are interpreted to coincide with episodes of Rio Grande rift faulting. Early activity in the fi eld includes two eruptive pulses: 10.8-9.2 Ma basaltic to dacitic volcanism on Lobato Mesa in the northeastern JMVF and 12-9 Ma mafi c to silicic volcanism in the southwestern JMVF. While 9-7 Ma eruptions persisted in the southern JMVF, a new eruptive center developed on the La Grulla Plateau in the northwestern JMVF (8.7-7.2 Ma), corresponding with a period of rift widening caused by re acti va tion of Laramide faults in this area. The older 8.7-7.8 Ma mafi c lavas emitted from Encino Point and the younger 7.7-7.2 Ma trachyandesite and dacite erupted on the La Grulla Plateau are assigned to a new unit called the La Grulla Formation. The chemical composition of a 640 m stack of lava fl ows exposed in the northern margin of the Valles caldera changes from dacite to andesite, then back to dacite upsection, becoming slightly more alkalic upward. The shift to more alkalic compositions occurs across a sedimentary break, marking a subtle change in magma source for the older Paliza Canyon Formation and the younger La Grulla Formation lavas. New age constraints from a rhyolite intrusion in the southern JMVF and pumiceous rhyolite deposits in the northern JMVF suggest an episode of localized, 7.6-7.8 Ma rhyolitic volcanism that occurred in the central part of the JMVF between 12-8 Ma Canovas Canyon Rhyolite and 7-6 Ma peak Bearhead Rhyolite volcanism. Younger Bearhead Rhyolite intrusions (7.1-6.5 Ma) are more widespread than previously documented, extending into the northeastern JMVF. Tschicoma Formation dacite erupted at 5 Ma in the Sierra de los Valles and then erupted throughout the northeastern JMVF 5-2 Ma. The more refi ned geochronology of the JMVF indicates that pre-caldera volcanic centers were characterized by geographically and chemically distinct, relatively short-lived, episodes of activity. Volcanism generally migrated eastward through time in the southern JMVF, but the pattern in the northern JMVF had a more complex east (10-9 Ma) to west (9-7 Ma) to east (5-2 Ma) pattern that refl ects the timing of motion on faults. The new ages, coupled with detailed mapping of both volcanic rocks and the Santa Fe Group, document signifi cant pulses of faulting, erosion, and deposition during middle Miocene time and during late Miocene time across the Cañones fault zone in the northern JMVF.

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Section: Southern Jemez Mountainsmentioning

confidence: 97%

Section: Northeastern Jemez Mountainsmentioning

confidence: 99%

Section: Northwestern Jemez Mountainsmentioning

confidence: 99%

“…Barrancones Hill is a hornblende-biotitebearing trachyte to dacite (Lawrence, 1979;Lawrence et al, 2004;Rowe et al, 2007). No age data are available for this dome.…”

Section: Miocene Santa Fe Groupmentioning

confidence: 99%

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Spatial and temporal trends in pre-caldera Jemez Mountains volcanic and fault activity

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“…The higher Zr contents could be attributed to the presence of accessory minerals such as zircon and this would be confirmed by analysing Hf, Th, and U contents. (e.g., Rowe et al 2007). …”

Section: Rock Series and Type Of Eruptive Products Of The Shirataka Vmentioning

confidence: 99%

Petrologic Study of Explosive Pyroclastic Eruption Stage in Shirataka Volcano, NE Japan: Synchronized Eruption of Multiple Magma Chambers

Ban¹,

Hirotani²,

Ishizuka³

et al. 2012

Petrology - New Perspectives and Applications

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From mush to eruption in centuries: assembly of the super-sized Oruanui magma body

Allan

Morgan

Wilson

et al. 2013

Contrib Mineral Petrol

169

389

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Development of a Continental Volcanic Field: Petrogenesis of Pre-caldera Intermediate and Silicic Rocks and Origin of the Bandelier Magmas, Jemez Mountains (New Mexico, USA)

Cited by 32 publications

References 71 publications

Spatial and temporal trends in pre-caldera Jemez Mountains volcanic and fault activity

Spatial and temporal trends in pre-caldera Jemez Mountains volcanic and fault activity

Petrologic Study of Explosive Pyroclastic Eruption Stage in Shirataka Volcano, NE Japan: Synchronized Eruption of Multiple Magma Chambers

From mush to eruption in centuries: assembly of the super-sized Oruanui magma body

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