Research Project
Grant-in-Aid for Scientific Research (C)
This is a detailed study of Late Proterozoic intrusion in the Sor Rondane Mountains, Antarctica. The intrusion is classified into three lithologies: strong gneissose metatonalite, weak gneissose metatonalite and metagabbro. The strong gneissose metatonalite is the main lithotype, which is geochemically categorized as low-K tholeiitic granitoid. Petrological studies suggest that the tholeiitic magma was derived from low-K basalt melting at the crustal depth, and the most plausible tectonic setting is a juvenile oceanic arc. The other two rocks are scattered as small intrusions and are geochemically regarded as calc-alkaline adakites related to oceanic slab melting. U-Pb SHRIMP zircon ages of the tholeiitic metatonalite are concentrated at 998-995 Ma, whereas the calc-alkaline adakites are younger and divided between ages 945-920 Ma and 772 Ma. Therefore, the Late Proterozoic intrusion was formed first as a juvenile arc component, followed by adakitic magmatism with oceanic slab melting.
All 2013 2012 2011 Other
All Journal Article (20 results) (of which Peer Reviewed: 20 results) Presentation (12 results)
Precambrian Research
Volume: 234 Pages: 47-62
10.1016/j.precamres.2012.09.026
Volume: 234 Pages: 63-84
10.1016/j.precamres.2013.02.007
Volume: 234 Pages: 257-287
10.1016/j.precamres.2012.10.016
Volume: 234 Pages: 161-182
10.1016/j.precamres.2012.10.009
Volume: 234 Pages: 8-29
10.1016/j.precamres.2013.05.017
Volume: 234 Pages: 183-209
10.1016/j.precamres.2012.12.002
Volume: 234 Pages: 136-160
10.1016/j.precamres.2012.11.011
Volume: 234 Pages: 210-228
10.1016/j.precamres.2012.10.002
Volume: 234 Pages: 1-7
10.1016/j.precamres.2013.06.010
岩石鉱物科学
Volume: 42 Pages: 159-173
10.2465/gkk.120808
Volume: 42 Pages: 185-189
10.2465/gkk.120924
地質学雑誌
Volume: 119 Pages: 190-204
10.5575/geosoc.2013.0003
Volume: 227 Pages: 99-119
10.1016/j.precamres.2012.04.006
Applied Geochemistry
Volume: 27 Pages: 796-805
Gondwana Research
Volume: 21 Pages: 829-837
10.1016/j.gr.2011.08.013
Volume: 118 Pages: 20-38
10.5575/geosoc.2011.0021
American mineralogist
Volume: 97 Pages: 268-280
10.2138/am.2012.3827
Volume: 200-203 Pages: 104-128
10.1016/j.precamres.2012.01.013
Polar Science
Volume: 5 Pages: 345-339
10.1016/j.polar.2011.03.005
In : Antarctica and Supercontinent Evolution, eds by S.L. Harley et al., Geological Society of London Special Publications
Volume: 283 Pages: 113-133
10.1144/SP383.4