Timing of syenite intrusions on the eastern slope of the Sredinnyi Range, Kamchatka: Rate of accretionary structure exhumation

J. K. Hourigan; A. V. Solov'ev; G. V. Ledneva; J. I. Garver; M. T. Brandon; P. W. Reiners

Timing of syenite intrusions on the eastern slope of the Sredinnyi Range, Kamchatka: Rate of accretionary structure exhumation

J. K. Hourigan, A. V. Solov'ev, G. V. Ledneva, J. I. Garver, M. T. Brandon, P. W. Reiners

Research output: Contribution to journal › Article › peer-review

Abstract

The isotopic thermochronological study included the U-Pb (SHRIMP) and fission-track dating of zircon and fission-track and (U-Th)-He dating of apatite from syenite intrusions cropping out in the eastern slope of the Sredinnyi Range of Kamchatka. The emplacement time of the intrusion was determined, and its exhumation velocity was evaluated. According to U-Pb (SHRIMP) zircon dating, the age of syenite crystallization (63.0 ± 0.6 and 70.4 ± 0.7 Ma) corresponds to the Late Cretaceous and Early Paleogene. Starting from 25 Ma, the cooling rate of the intrusion, which was likely controlled by exhumation, varied from 4 °C/Ma to 20 °C/Ma. If the geothermal gradient is assumed to be 30 °C/km, the exhumation rate of the intrusion from the Late Oligocene and until now ranged from 0.18 km/Ma to 0.67 km/Ma.

Original language	English (US)
Pages (from-to)	97-105
Number of pages	9
Journal	Geochemistry International
Volume	42
Issue number	2
State	Published - Feb 2004
Externally published	Yes

ASJC Scopus subject areas

Geophysics
Geochemistry and Petrology

Cite this

@article{7b90d4c315524e62a4033c4e9fa4ff2b,

title = "Timing of syenite intrusions on the eastern slope of the Sredinnyi Range, Kamchatka: Rate of accretionary structure exhumation",

abstract = "The isotopic thermochronological study included the U-Pb (SHRIMP) and fission-track dating of zircon and fission-track and (U-Th)-He dating of apatite from syenite intrusions cropping out in the eastern slope of the Sredinnyi Range of Kamchatka. The emplacement time of the intrusion was determined, and its exhumation velocity was evaluated. According to U-Pb (SHRIMP) zircon dating, the age of syenite crystallization (63.0 ± 0.6 and 70.4 ± 0.7 Ma) corresponds to the Late Cretaceous and Early Paleogene. Starting from 25 Ma, the cooling rate of the intrusion, which was likely controlled by exhumation, varied from 4 °C/Ma to 20 °C/Ma. If the geothermal gradient is assumed to be 30 °C/km, the exhumation rate of the intrusion from the Late Oligocene and until now ranged from 0.18 km/Ma to 0.67 km/Ma.",

author = "Hourigan, {J. K.} and Solov'ev, {A. V.} and Ledneva, {G. V.} and Garver, {J. I.} and Brandon, {M. T.} and Reiners, {P. W.}",

year = "2004",

month = feb,

language = "English (US)",

volume = "42",

pages = "97--105",

journal = "Geochemistry International",

issn = "0016-7029",

publisher = "Maik Nauka-Interperiodica Publishing",

number = "2",

}

TY - JOUR

T1 - Timing of syenite intrusions on the eastern slope of the Sredinnyi Range, Kamchatka

T2 - Rate of accretionary structure exhumation

AU - Hourigan, J. K.

AU - Solov'ev, A. V.

AU - Ledneva, G. V.

AU - Garver, J. I.

AU - Brandon, M. T.

AU - Reiners, P. W.

PY - 2004/2

Y1 - 2004/2

N2 - The isotopic thermochronological study included the U-Pb (SHRIMP) and fission-track dating of zircon and fission-track and (U-Th)-He dating of apatite from syenite intrusions cropping out in the eastern slope of the Sredinnyi Range of Kamchatka. The emplacement time of the intrusion was determined, and its exhumation velocity was evaluated. According to U-Pb (SHRIMP) zircon dating, the age of syenite crystallization (63.0 ± 0.6 and 70.4 ± 0.7 Ma) corresponds to the Late Cretaceous and Early Paleogene. Starting from 25 Ma, the cooling rate of the intrusion, which was likely controlled by exhumation, varied from 4 °C/Ma to 20 °C/Ma. If the geothermal gradient is assumed to be 30 °C/km, the exhumation rate of the intrusion from the Late Oligocene and until now ranged from 0.18 km/Ma to 0.67 km/Ma.

AB - The isotopic thermochronological study included the U-Pb (SHRIMP) and fission-track dating of zircon and fission-track and (U-Th)-He dating of apatite from syenite intrusions cropping out in the eastern slope of the Sredinnyi Range of Kamchatka. The emplacement time of the intrusion was determined, and its exhumation velocity was evaluated. According to U-Pb (SHRIMP) zircon dating, the age of syenite crystallization (63.0 ± 0.6 and 70.4 ± 0.7 Ma) corresponds to the Late Cretaceous and Early Paleogene. Starting from 25 Ma, the cooling rate of the intrusion, which was likely controlled by exhumation, varied from 4 °C/Ma to 20 °C/Ma. If the geothermal gradient is assumed to be 30 °C/km, the exhumation rate of the intrusion from the Late Oligocene and until now ranged from 0.18 km/Ma to 0.67 km/Ma.

UR - http://www.scopus.com/inward/record.url?scp=9244231113&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=9244231113&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:9244231113

SN - 0016-7029

VL - 42

SP - 97

EP - 105

JO - Geochemistry International

JF - Geochemistry International

IS - 2

ER -

Timing of syenite intrusions on the eastern slope of the Sredinnyi Range, Kamchatka: Rate of accretionary structure exhumation

Abstract

ASJC Scopus subject areas

Other files and links

Fingerprint

Cite this