The Okhotsk-Chukotka volcanic belt: Age of its northern part according to new Ar-Ar and U-Pb geochronological data

被引：42
作者：
Tikhomirov, P. L. [1 ]
Akinin, V. V.
Ispolatov, V. O.
Alexander, P.
Cherepanova, I. Yu.
Zagoskin, V. V.
机构：
[1] Moscow MV Lomonosov State Univ, Geol Fac, Moscow, Russia
[2] Russian Acad Sci, Far E Div, NE Res Inst, Magadan, Russia
[3] Laurentian Univ, Dept Earth Sci, Mineral Explorat Res Ctr, Sudbury, ON P3E 2C6, Canada
[4] Scottish Univ Environm Res Ctr, Glasgow, Lanark, Scotland
[5] ZAO Chaunskoe Min Enterprise, Pevek, Russia
[6] State Anyui Min Enterprise, Bilibino, Russia
来源：
STRATIGRAPHY AND GEOLOGICAL CORRELATION | 2006年 / 14卷 / 05期
关键词：
Okhotsk-Chukotka belt; active continental margins; volcanism; stratigraphy; geochronology;
D O I：
10.1134/S0869593806050054
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
Current geochronological data on the Okhotsk-Chukotka volcanic belt (OCVB) and relevant problems are discussed. The belt evolution is suggested to be modeled based on 40Ar/39Ar and U-Pb dates more useful in several aspects than common K-Ar or Rb-Sr dates and methods of paleobotanical correlation. Based on new 40Ar/39Ar and U-Pb dates obtained for volcanic rocks in the OCVB northern part, the younger (Coniacian) age is established for lower stratigraphic units in the Central Chukotka segment of the belt, and the eastward migration of volcanic activity is shown for terminal stages of this structure evolution.
引用
收藏
页码：524 / 537
页数：14
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