The upper mantle of Kamchatka in isotopic-geochemical and geophysical anomalies: The role of asthenospheric diapirism

被引：0
作者：
A. V. Koloskov
L. I. Gontovaya
S. V. Popruzhenko
机构：
[1] Russian Academy of Sciences,Institute of Volcanology and Seismology, Far East Branch
[2] Kamchatnedra,undefined
[3] Ministry of Natural Resources of the Russian Federation,undefined
来源：
Russian Journal of Pacific Geology | 2014年 / 8卷
关键词：
isotopic-geochemical; seismic tomography; gravimetry; lithosphere; mantle diapirs; Kamchatka peninsula; Bering Sea;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Data of isotopic-geochemical, seismotomographic, and gravimetric studies of the mantle characteristics of the Kamchatka and Bering Sea regions are compared. It is shown that the revealed isotopicgeochemical anomalies are well verified by the geophysical materials. A hypothesis is put forward that the anomalies of the Central Kamchatka and Bering Sea regions are a consequence of the penetration of local diapirs into the lithosphere; their activity is associated with the appearance of rocks belonging to the intraplate geochemical type. The juncture region of the Kuril-Kamchatka and Komandor-Aleutian island arc systems is characterized by the higher participation of crustal material in the composition of the volcanic rocks of the mantle genesis and by a combination of manifestations of the island arc and intraplate types.
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页码：151 / 162
页数：11
相关论文
共 106 条
[1]  
Avdeiko G P(2006)Geodynamic conditions of volcanism and magma formation in the Kurile-Kamchatka island-arc system Petrology 14 230-246
[2]  
Palueva A A(2013)Cretaceous lower crust of the continental margins of the Northern Pacific: petrological and geochronological data on lower to middle crustal xenoliths Petrology 21 28-65
[3]  
Khleborodova O A(1998)Sr, Nd, and Pb isotopes in Neogene melanephelinites and deep-seated xenoliths from Northeast Russia Geochem. Int. 36 24-33
[4]  
Akinin V V(1995)Strontium and oxygen isotope composition of the Late Cenozoic K-Na alkaline basalts of intraplate affinity, Kamchatka Petrologiya 3 207-213
[5]  
Andronikov A V(1997)Isotopic composition of Late Neogene K-Na alkaline basalts of eastern Kamchatka: indicators of the heterogeneity of the mantle magma sources Geochem. Int. 35 884-896
[6]  
Mukasa S B(2008)Upper mantle beneath Kamchatka: the depth model and its relation to tectonics Russ. J. Pac. Geol. 2 165-174
[7]  
Apt Yu E(2010)Upper mantle structure in the ocean-continent transition zone: Kamchatka J. Volcanol. Seismol. 4 223-232
[8]  
Akinin V V(2012)Migration paths of magma and fluids and lava compositions in Kamchatka Russ. Geol. Geophys. 53 1633-1662
[9]  
Wright J E(2010)Mantle structure and dynamics under East Russia and adjacent regions Russ. Geol. Geophys. 51 925-938
[10]  
Volynets O N(2013)New petrological data on the volcanic rocks of the Chichinautzin Region: the sources of the magmatic melts and the origin of the Trans-Mexican Volcanic Belt Russ. J. Pac. Geol. Geol. 7 247-261
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