کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4737355 | 1358171 | 2014 | 14 صفحه PDF | دانلود رایگان |
The age of the major igneous complexes in the western part of the Selenga-Stanovoy superterrane has been estimated by 40Ar/39Ar dating: trachyandesite-basalts of the Kuitun (Chichatka) complex—259.4 ± 6.2 Ma; gabbro of the Tukuringra complex—156.3 ± 4.8 Ma; granites and pegmatites of the Tukuringra complex—153.1 ± 3.8, 154.0 ± 4.4, 156.8 ± 4.0, and 151.2 ± 3.2 Ma; granodiorites, granites, and leucogranites of the Amudzhikan complex—131.7 ± 2.4, 134.5 ± 2.8, and 131.6 ± 4.2 Ma; and lamprophyre dikes—125.2 ± 2.4 and 125.2 ± 3.4 Ma. Two stages of hydrothermal ore formation process have been recognized: 132–131 and ~ 125 Ma. It is shown that the deposit formation and superposed processes follow the general regularities of the Late Mesozoic evolution of the Pacific Asia margin.
Journal: Russian Geology and Geophysics - Volume 55, Issue 3, March 2014, Pages 335-348