Research output: Contribution to journal › Article › peer-review
An integrate model of subduction : Contributions from geology, experimental petrology, and seismic tomography. / Dobretsov, N. L.; Koulakov, I. Yu; Litasov, K. D. et al.
In: Russian Geology and Geophysics, Vol. 56, No. 1-2, 01.01.2015, p. 13-38.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - An integrate model of subduction
T2 - Contributions from geology, experimental petrology, and seismic tomography
AU - Dobretsov, N. L.
AU - Koulakov, I. Yu
AU - Litasov, K. D.
AU - Kukarina, E. V.
PY - 2015/1/1
Y1 - 2015/1/1
N2 - We summarize the available knowledge of subduction gained from geology, petrology, and seismology and consider the advantages and drawbacks of each method. Regional and local seismic tomography reveals complex systems of fluid and melt migration at different depths above subducting slabs. The physicochemical evolution of the magma storage system maintaining active volcanism is modeled with reference to a wealth of geological and geophysical data. Subduction-related processes are discussed by examples of active (Kamchatka and Japan arcs) and ancient (Kokchetav metamorphic complex) subduction zones. Comprehensive geological and geophysical studies in Kamchatka and Japan prove valid the leading role of andesite magma in subduction of oceanic crust and, on the other hand, show that modeling independent migration paths of melts and fluids is problematic. The case study of Kamchatka provides more insights into melting in intermediate magma reservoirs at the depths about 50-80 and 30. km and highlights the significance of shallow magma sources at the pre-eruption stage. The Kokchetav metamorphics, which are exhumed suprasubduction rocks, offer an exceptional opportunity to estimate directly the compositions and ages of subduction-related melts.
AB - We summarize the available knowledge of subduction gained from geology, petrology, and seismology and consider the advantages and drawbacks of each method. Regional and local seismic tomography reveals complex systems of fluid and melt migration at different depths above subducting slabs. The physicochemical evolution of the magma storage system maintaining active volcanism is modeled with reference to a wealth of geological and geophysical data. Subduction-related processes are discussed by examples of active (Kamchatka and Japan arcs) and ancient (Kokchetav metamorphic complex) subduction zones. Comprehensive geological and geophysical studies in Kamchatka and Japan prove valid the leading role of andesite magma in subduction of oceanic crust and, on the other hand, show that modeling independent migration paths of melts and fluids is problematic. The case study of Kamchatka provides more insights into melting in intermediate magma reservoirs at the depths about 50-80 and 30. km and highlights the significance of shallow magma sources at the pre-eruption stage. The Kokchetav metamorphics, which are exhumed suprasubduction rocks, offer an exceptional opportunity to estimate directly the compositions and ages of subduction-related melts.
KW - Dehydration
KW - Kamchatka
KW - Kokchetav
KW - Lava composition
KW - Migration of melts and fluids
KW - Phase change
KW - Seismicity
KW - Subduction
KW - Volcano
UR - http://www.scopus.com/inward/record.url?scp=84925326927&partnerID=8YFLogxK
U2 - 10.1016/j.rgg.2015.01.002
DO - 10.1016/j.rgg.2015.01.002
M3 - Article
AN - SCOPUS:84925326927
VL - 56
SP - 13
EP - 38
JO - Russian Geology and Geophysics
JF - Russian Geology and Geophysics
SN - 1068-7971
IS - 1-2
ER -
ID: 25481189