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SHRIMP U-Pb Age of the Early Jurassic Deformed Granites in the Aneui Quadrangle, SW Yeongnam Massif
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  • Journal title : Economic and Environmental Geology
  • Volume 49, Issue 2,  2016, pp.147-153
  • Publisher : The Korean Society of Economic and Environmental Geology
  • DOI : 10.9719/EEG.2016.49.2.147
 Title & Authors
SHRIMP U-Pb Age of the Early Jurassic Deformed Granites in the Aneui Quadrangle, SW Yeongnam Massif
Seo, Jaehyeon; Song, Yong-Sun; Park, Kye-Hun;
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 Abstract
SHRIMP U-Pb age determination was carried out for deformed granites in the Aneui quadrangle, SW Yeongnam Massif. Dating of zircons from a highly deformed mylonitic granite with banded structure and a relatively less deformed porphyritic to augenic granites, that were known as Precambrian gneisses, yielded the same age of ca. 195 Ma. On the basis of this result and previous age data, Early to Middle Mesozoic igneous activity around the Aneui area was interpreted as follows; Subduction-related granitic magmatism started with the intrusion of the Hamyang Granite in the middle Triassic (ca. 225-219 Ma) mainly in the west of the area and ended with syenitic intrusion at the end of Triassic period (ca, 220-210 Ma). After a relatively short period of quiescency, granitic magmatism restarted with the intrusion of magma forming deformed granites dated in this study at the Early Jurassic of ca. 195 Ma and continued to ca. 189 Ma and dioritic intrusion was associated around the late stage of granitic magmatism.
 Keywords
SHRIMP Zircon U-Pb age;Early Jurassic;Deformed granite;Yeongnam Massif;Aneui quadrangle;
 Language
Korean
 Cited by
1.
SHRIMP U-Pb Zircon Ages of the Haeinsa Granite from Central Part of the Yeongnam Massif, The Journal of the Petrological Society of Korea, 2016, 25, 4, 401  crossref(new windwow)
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