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Rifts of deeply eroded Hawaiian basaltic shields: A structural analog for large Martian volcanoesRecently derived morphologic evidence suggests that intrusive events have not only influenced the growth of young shield volcanoes on Mars but also the distribution of volatiles surrounding these volcanoes: in addition to rift zones and flank eruptions on Arsia Mons and Pavonis Mons, melt water channels were identified to the northwest of Hecates Tholus, to the south of Hadriaca Patera, and to the SE of Olympus Mons. Melt water release could be the surface expression of tectonic deformation of the region or, potentially, intrusive events associated with dike emplacement from each of these volcanoes. In this study the structural properties of Hawaiian shield volcanoes were studied where subaerial erosion has removed a sufficient amount of the surface to enable a direct investigation of the internal structure of the volcanoes. The field investigation of dike morphology and magma flow characteristics for several volcanoes in Hawaii is reported. A comprehensive investigation was made of the Koolau dike complex that passes through the summit caldera. A study of two other dissected Hawaiian volcanoes, namely Waianae and East Molokai, was commenced. The goal is not only to understand the emplacement process and magma flow within these terrestrial dikes, but also to explore the possible role that intrusive events may have played in volcano growth and the distribution of melt water release on Mars.
Document ID
19880021110
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Knight, Michael D.
(Hawaii Univ. Honolulu., United States)
Walker, G. P. L.
(Hawaii Univ. Honolulu., United States)
Mouginis-Mark, P. J.
(Hawaii Univ. Honolulu., United States)
Rowland, Scott K.
(Geological Survey Menlo Park, Calif., United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1988
Publication Information
Publication: Lunar and Planetary Inst., NASA MEVTV Program Working Group Meeting: Volcanism on Mars
Subject Category
Geophysics
Accession Number
88N30494
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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