Granulites of the South Muya block (Baikal-Muya Foldbelt) : Age of metamorphism and nature of protolith. / Skuzovatov, S. Yu; Sklyarov, E. V.; Shatsky, V. S. et al.
In: Russian Geology and Geophysics, Vol. 57, No. 3, 01.03.2016, p. 451-463.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Granulites of the South Muya block (Baikal-Muya Foldbelt)
T2 - Age of metamorphism and nature of protolith
AU - Skuzovatov, S. Yu
AU - Sklyarov, E. V.
AU - Shatsky, V. S.
AU - Wang, K. L.
AU - Kulikova, K. V.
AU - Zarubina, O. V.
PY - 2016/3/1
Y1 - 2016/3/1
N2 - High-pressure mafic granulites and garnet pyroxenites occur within the South Muya block as boudins or lenses among metamorphic rocks of the Kindikan Group. Their primary minerals crystallized at 670-750 °C and 9.5-12.0 kbar. Granulite metamorphism peaked at 630 Ma, according to LA-ICP-MS U-Pb zircon ages. Judging by their major- and trace-element compositions and Hf isotope ratios in zircons, the South Muya granulites were derived from differentiated within-plate basalts, which, in turn, resulted from melting of juvenile mantle source and Meso- or Paleoproterozoic crust. The events of granulite and eclogite metamorphism in the South and North Muya blocks, respectively, were coeval and the two blocks were spatially close to each other at the onset of Late Baikalian subduction and collision events.
AB - High-pressure mafic granulites and garnet pyroxenites occur within the South Muya block as boudins or lenses among metamorphic rocks of the Kindikan Group. Their primary minerals crystallized at 670-750 °C and 9.5-12.0 kbar. Granulite metamorphism peaked at 630 Ma, according to LA-ICP-MS U-Pb zircon ages. Judging by their major- and trace-element compositions and Hf isotope ratios in zircons, the South Muya granulites were derived from differentiated within-plate basalts, which, in turn, resulted from melting of juvenile mantle source and Meso- or Paleoproterozoic crust. The events of granulite and eclogite metamorphism in the South and North Muya blocks, respectively, were coeval and the two blocks were spatially close to each other at the onset of Late Baikalian subduction and collision events.
KW - Central Asian Orogenic Belt
KW - Continental subduction
KW - Garnet pyroxenites
KW - Granulites
KW - South Muya block
KW - U-Pb age
KW - Zircon
UR - http://www.scopus.com/inward/record.url?scp=84962163501&partnerID=8YFLogxK
U2 - 10.1016/j.rgg.2016.03.007
DO - 10.1016/j.rgg.2016.03.007
M3 - Article
AN - SCOPUS:84962163501
VL - 57
SP - 451
EP - 463
JO - Russian Geology and Geophysics
JF - Russian Geology and Geophysics
SN - 1068-7971
IS - 3
ER -
ID: 25794608