EarthRef.org Reference Database (ERR) -- Keating et al. 1984

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Keating et al. 1984

Keating, B.H., Mattey, D.P., Naughton, J. and Helsley, C.E. (1984). Age and origin of Truk Atoll, eastern Caroline Islands; geochemical, radiometric-age, and paleomagnetic evidence. Geological Society of America, Bulletin 95(3): 350-356.

Two shield-building magma types: a mildly alkalic Truk Main Lava Series (TMLS) and a less alkalic Truk Transitional Lava Series (TTLS); and a post-erosional, highly silica-undersaturated, and incompatible-trace-element-enriched Truk Nephelinite Series (TNS). The TMLS and TTLS shield-building lavas give a mean K-Ar age of 10.9 m.y.; post-erosional TNS lavas are dated at 4.8 m.y. B.P. Paleomagnetic results for 15 stably magnetized sites give a paleopole of declination and inclination of 359.3 degrees E and 8.8 degrees 30', respectively, which suggests that Truk was formed 4.4 degrees north of the equator. These data are consistent with a hot-spot origin for the volcanics of Truk Atoll.--Modified journal abstract.

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Keywords
absolute age; atolls; Caroline Islands; Cenozoic; classification;, dates; genesis; geochemistry; geochronology; hot spots; igneous, rocks; K/Ar; lava; magmas; magnetic declination; magnetic, inclination; major elements; Micronesia; Neogene; Oceania;, paleomagnetism; plate tectonics; pole positions; reefs; Tertiary;, trace elements; Truk Atoll; volcanic rocks, 05A, Igneous and metamorphic petrology

Journal
Geological Society of America, Bulletin
http://www.geosociety.org/pubs/index.htm

Publisher
The Geological Society of America
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