| UDC 553.52:551.76(571.65) |
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The Late Mesozoic Plutonic Series of the Okhotsk-Kolyma Region |
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| © 2015 B. F. Palymsky, N. A. Goryachev, V. V. Akinin, I. S. Golubenko, S. M. Lyamin |
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| North-East Interdisciplinary Scientific Research Institute n. a. N. A. Shilo, FEB RAS, Magadan |
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| E-mail:
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| Development of small-scale and generalized geologic, tectonic, and metallogenic maps required systematizing
data on numerous intrusion groups identifi ed in the middle- and large-scale area mapping
process. A plutonic series, i.e. a set of igneous rock assemblages of the same composition, structural
setting, formation time, and magmatism development history, is proposed as the generalizing unit for
small-scale maps. Within the Okhotsk-Kolyma region, six Late Mesozoic plutonic series have been
defi ned. The Yana-Kolyma orogenic belt includes the Kolyma Series of Late Jurassic granitoids,
forming the Main Kolyma Batholith Belt, and the Tenka Series of the Late Jurassic – Early Cretaceous,
forming the granodiorite-granite massifs south-west of the Main Belt. In the Okhotsk-Koryak
orogenic belt, it is the Koni-Taigonos Series of the Early Cretaceous, with major intrusions along the
coastline of the Sea of Okhotsk; the Early to Late Cretaceous Okhotsk diorite-granodiorite series as
well as the Late Cretaceous Even diorite-granite and the Yana gabbro-diorite series. In their origin,
the latter three are closely related to the Okhotsk-Chukotka Volcanogenic Belt. Plutonic series form
extensive plutonic belts and play a key role in the gold-silver ore mineralization in Magadan Oblast. |
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| Keywords: Okhotsk-Kolyma region, Late Mesozoic, plutonic series, intrusive sets, Main Kolyma
Batholith Belt, Okhotsk-Chukotka Volcanogenic Belt. |
| Full text [In Russian] |
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