Browse wiki

From Open Energy Information

Stratigraphic Relations and Lithologic Variations in the Jemez Volcanic Field, New Mexico
Abstract Over 100 radiometric dates and recent deta
Over 100 radiometric dates and recent detailed geologic mapping allow some refinements of the stratigraphic relations of major units and generalization of temporal lithologic variations in the Jemez volcanic field. Volcanism had begun in the area by about 16.5 Ma with episodic eruptions of alkaline basalts. By 13 Ma, alkaline volcanism had been replaced with eruptions of more voluminous olivine tholeiite. High-silica rhyolite, derived from melts of lower crust, also was erupting by about 13 Ma. Basalt and high-silica rhyolite continued to be erupted until about 7 and 6 Ma, respectively, but effusions of dominantly andesitic differentiates of basalt that began as early as about 12 Ma volumetrically overshadowed all other eruptive products between 10 and 7 Ma. From 7 to 3 Ma the dominant erupted lithology was dacite, which appears to have been generated by mixing of magmas whose compositions are approximated by earlier andesites and high-silica rhyolites. Less than 4-3 Ma volcanism was dominated by eruption of rhyolitic tuffs. Field relations, geochemistry, and dates specifically indicate the following with regards to stratigraphie relations: (1) distinctions among basalt of Chamisa Mesa, Paliza Canyon Formation basalts, and Lobato Basalt for other than geographic reasons are artificial; basaltic volcanism was continuous in volcanic field from >13 to 7 Ma, (2) Canovas Canyon and Bearhead rhyolites form a continuum of high-silica rhyolite volcanism from >13 to 6 Ma, (3) hypabyssal and volcanic rocks of the Cochiti mining district probably represent the exhumed interior of a Keres Group volcano(s), (4) temporal overlaps exist among the major stratigraphie groups which may imply some genetic relations, and (5) the Tewa Group formation Cerro Rubio Quartz Latite may more appropriately be considered part of the Tschicoma Formation of the Polvadera Group. Preliminary analysis of hydrothermal alteration in the context of the volcanic stratigraphy suggests at least three distinct hydrothermal events have occurred in the volcanic field�s history.
occurred in the volcanic field�s history.  +
Author Jamie N. Gardner  + , Fraser E. Goff  + , Sammy Garcia  + , Roland C. Hagan  +
Citation Jamie N. Gardner,Fraser E. Goff,Sammy Garcia,Roland C. Hagan. 1986. [[Stratigraphic Relations and Lithologic Variations in the Jemez Volcanic Field, New Mexico]]. Journal of Geophysical Research. 91(B2):1763-1778.  +
DOI 10.1029/JB091iB02p01763  +
Document type Journal Article  +
Foaf/Page http://onlinelibrary.wiley.com/doi/10.1029/JB091iB02p01763/abstract;jsessionid=6AFC0F7FFA10FFCABD4A1754DEBDE586.d01t02?deniedAccessCustomisedMessage=&userIsAuthenticated=false  +
Link http://onlinelibrary.wiley.com/doi/10.1029/JB091iB02p01763/abstract;jsessionid=6AFC0F7FFA10FFCABD4A1754DEBDE586.d01t02?deniedAccessCustomisedMessage=&userIsAuthenticated=false  +
Name Stratigraphic Relations and Lithologic Variations in the Jemez Volcanic Field, New Mexico  +
PublicationDate 1986  +
Publisher Journal of Geophysical Research  +
ReferenceGenre Geothermal  +
Has query
"Has query" is a predefined property that represents meta information (in form of a subobject) about individual queries and is provided by Semantic MediaWiki.
Stratigraphic Relations and Lithologic Variations in the Jemez Volcanic Field, New Mexico + , Stratigraphic Relations and Lithologic Variations in the Jemez Volcanic Field, New Mexico + , Stratigraphic Relations and Lithologic Variations in the Jemez Volcanic Field, New Mexico + , Stratigraphic Relations and Lithologic Variations in the Jemez Volcanic Field, New Mexico + , Stratigraphic Relations and Lithologic Variations in the Jemez Volcanic Field, New Mexico +
Categories References , Geothermal References , Reference Materials
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.
15:18:33, 22 May 2014  +
hide properties that link here 
Fenton Hill HDR Geothermal Area + , Valles Caldera - Redondo Geothermal Area + , Valles Caldera - Sulphur Springs Geothermal Area + ReferenceForGardnerGoffGarciaHagan1986
Compound and Elemental Analysis At Valles Caldera - Redondo Geothermal Area (Gardner, Et Al., 1986) + Reference material
 
Enter the name of the page to start browsing from.