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Isotopic Analysis At Valles Caldera - Redondo Geothermal Area (Phillips, 2004)
ExpActivityDateEnd 2004  +
ExplorationBasis The study was undertaken to refine underst
The study was undertaken to refine understanding of the post-collapse history of the Valles caldera. The study utilized 40Ar/39Ar age dating to investigate the maximum time window of resurgence and rate of uplift of Redondo Peak; the timing of eruption of the Deer Canyon and Redondo Creek ryholites, and how these eruption ages relate to changes in the magma chamber prior to and during resurgence; and the ages of several megabreccia blocks within the Valles caldera.
abreccia blocks within the Valles caldera.  +
ExplorationOutcome useful regional reconnaissance  +
ExplorationTechnique Isotopic Analysis- Rock +
Notes Samples were screened based on petrographi
Samples were screened based on petrographic relations between different mineral phases, electron microprobe backscattered electron (BSE) imaging, and their major and trace element geochemistry in order to identify ideal phenocryst for 40Ar/39Ar age dating. Representative samples were selected from pre- and post-resurgence volcanic units to refine the age of eruption of the Valles caldera and to better understand the timing of post-eruption volcanism. Megabreccia blocks were also sampled to better constrain the age of deformation within the caldera.
the age of deformation within the caldera.  +
OpenEI/PageDescription Isotopic Analysis At Valles Caldera - Redondo Geothermal Area (Phillips, 2004): geothermal exploration activity.  +
OpenEI/PageKeyword Geothermal  + , Valles Caldera - Redondo Geothermal Area  + , Isotopic Analysis- Rock  +
Place Valles Caldera - Redondo Geothermal Area +
Reference material Collapse and Resurgence of the Valles Caldera, Jemez Mtns, NM- 40Ar/39Ar Ages of Megabreccia Blocks and Age Constraints on Timing and Duration of Resurgence +
Has query
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Isotopic Analysis At Valles Caldera - Redondo Geothermal Area (Phillips, 2004) + , Isotopic Analysis At Valles Caldera - Redondo Geothermal Area (Phillips, 2004) +
Categories Geothermal , Exploration Activities
Modification date
"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by Semantic MediaWiki.
19:07:09, 25 June 2014  +
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