Tikhomirov, P. L. et al. (2017) Post-collisional Magmatism of Western Chukotka and Early Cretaceous Tectonic Rearrangement in Northeastern Asia, Geotectonics, 51, 131-151, doi: 10.1134/S0016852117020054. < 20191218114748-331522 > pub

Map on Earth or stone. Places and analyses are shown.

  • abstract:

    The paper presents new data on the isotopic age and chemical composition of volcanic rocks from the Tytyl’veem and Mangazeika basins of western Chukotka superposed on Mesozoides of the Verkhoyansk–Chukotka Tectonic Region. The results of SIMS U–Pb zircon dating (121.4 ± 2.8 and 118.0 ± 2.0 Ma) corroborate the Aptian age of the Tytyl’veem Formation. This age, in turn, indicates its formation after closure of the South Anyui ocean (Neocomian), but before origination of the Okhotsk–Chukotka Belt (Albian–Campanian). Post-collisional Aptian igneous rocks are widespread in the northern Verkhoyansk–Chukotka Tectonic Region; the length of the corresponding igneous province is no less than 1400 km. In geochemical characteristics, the post-collisional volcanic rocks occurring in Western Chukotka are similar with the rocks from Andean-type igneous belts.

  • doi: 10.1134/S0016852117020054
  • modified at 8 h ago
Tixhr 741096239 thumb T05-13 < 20181030110747-745063 >pub
  • place: N67°47′15.6″, E168°38′38.4″ more
  • classification: volcanic:dacitic
  • physical-form: on mount
  • quantity (g): 2.6
  • description: NE Russia, Chukotka peninsula; lower sub-formations of the Tytyl’veem Formation
  • modified at 2019-12-18
Tixhr1068527176 thumb T05-24 < 20181030110951-009995 >pub
  • place: N67°38′25.6″, E169°12′39.4″ more
  • classification: volcanic:rhyolitic
  • physical-form: on mount
  • quantity (g): 3.2
  • description: NE Russia, Chukotka peninsula; middle sub-formations of the Tytyl’veem Formation
  • modified at 2019-12-18
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binder of Post-collisional Magmatism of Western Chukotka and Early Cretaceous Tectonic Rearrangement in Northeastern Asia pub container 20191218114816-244682
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locality of T05-13 pub 67.7877 N 168.6440 E 20191218132611-217329
locality of T05-24 pub 67.6404 N 169.2109 E 20191218132813-991870
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T05-24-5 pub SIMS Cameca ims-1270 5 20191218134357-364485
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T05-24-10 pub SIMS Cameca ims-1270 5 20191218134357-755626
T05-13-2 pub SIMS Cameca ims-1270 5 20191218134355-332471
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T05-13-1 pub SIMS Cameca ims-1270 5 20191218134355-497252
T05-13-4 pub SIMS Cameca ims-1270 5 20191218134355-564138
T05-13-7 pub SIMS Cameca ims-1270 5 20191218134356-576116
T05-13-17 pub SIMS Cameca ims-1270 5 20191218134356-600591
T05-24-3 pub SIMS Cameca ims-1270 5 20191218134356-153257
name spots global-id
caption ID assembly stone
Table 3.SIMS U-Pb isotopic analyses of zircons from volcanic rocks of Tytyl’veem Formation pub 20191218134427-027813 U-series (Tikhomirov et al., 2017) 12
manual
  • name
  • Tikhomirov, P. L.
  • Prokof'ev, V.Yu.
  • Kal'ko, I.A.
  • Apletalin, A.V.
  • Nikolaev, Y.N.
  • Kobayashi, Katsura
  • Nakamura, Eizo