TY - JOUR
T1 - Post-peak (<530 Ma) thermal history of Lützow-Holm Complex, East Antarctica, based on Rb-Sr and Sm-Nd mineral chronology
AU - Miyamoto, Tomoharu
AU - Satish-Kumar, M.
AU - Dunkley, Daniel J.
AU - Osanai, Yasuhito
AU - Yoshimura, Yasutaka
AU - Motoyoshi, Yoichi
AU - Carson, Christopher J.
PY - 2008/12/1
Y1 - 2008/12/1
N2 - Rb-Sr and Sm-Nd mineral dating of metamorphic rocks from Skallen, Skallevikshalsen and Rundvågshetta, in the southwestern part of the Lützow-Holm Complex, Dronning Maud Land, assists in constructing a thermal history after peak metamorphism. The results fall into two groups: (1) a record of regional cooling after peak metamorphism (524-488 Ma); (2) local resetting 50-80 Ma after peak metamorphism (474-446 Ma). This grouping is consistently observed in published ages from various localities in the Lützow-Holm Complex. A Sm-Nd age of 524 Ma is indistinguishable from published zircon and monazite ages. Ages of 511 and 488 Ma are related to cooling after peak metamorphism. The younger age group overlaps with ages of post-metamorphic magmatism and related hydrothermal activity reported from localities throughout East Antarctica. This intracontinental, post-orogenic igneous activity continued after the tectonic assembly of Gondwana.
AB - Rb-Sr and Sm-Nd mineral dating of metamorphic rocks from Skallen, Skallevikshalsen and Rundvågshetta, in the southwestern part of the Lützow-Holm Complex, Dronning Maud Land, assists in constructing a thermal history after peak metamorphism. The results fall into two groups: (1) a record of regional cooling after peak metamorphism (524-488 Ma); (2) local resetting 50-80 Ma after peak metamorphism (474-446 Ma). This grouping is consistently observed in published ages from various localities in the Lützow-Holm Complex. A Sm-Nd age of 524 Ma is indistinguishable from published zircon and monazite ages. Ages of 511 and 488 Ma are related to cooling after peak metamorphism. The younger age group overlaps with ages of post-metamorphic magmatism and related hydrothermal activity reported from localities throughout East Antarctica. This intracontinental, post-orogenic igneous activity continued after the tectonic assembly of Gondwana.
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U2 - 10.1144/SP308.8
DO - 10.1144/SP308.8
M3 - Article
AN - SCOPUS:71549155989
VL - 308
SP - 165
EP - 181
JO - Geological Society Special Publication
JF - Geological Society Special Publication
SN - 0305-8719
ER -