Characteristics of the early cretaceous igneous activity in the Korean Peninsula and tectonic implications

Sung Won Kim, Sanghoon Kwon, In Chang Ryu, Youn Joong Jeong, Sung Ja Choi, Weon Seo Kee, Keewook Yi, Youn Soo Lee, Bok Chul Kim, Deok Won Park

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

This study presents sensitive high-resolution ion microprobe (SHRIMP) U-Pb zircon ages, K-Ar ages, and whole-rock chemical and isotopic (Sr-Nd) compositions of the Early Cretaceous igneous activity in western South Korea. The volcanics and plutons yield zircon U-Pb ages of ca. 110 Ma, in the Albian of the late Early Cretaceous. K-Ar biotite and plagioclase ages are slightly younger, ca. 103 Ma. The geochemical signatures of the rocks are characterized by negative Nb, Ta, and Ti anomalies, relatively low ε Nd(T) values (between -15.91 and -9.36), and enrichment in light rare earth elements, suggesting the effects of subduction-related magmatism. Together with the Sr and Nd isotopic compositions of the intermediate to acid volcanics, geochemical characteristics reflect a lower-crustal magma source. This Albian event over the Korean Peninsula is related to Early Jurassic subduction and subsequent lithospheric delamination and/or slab rollback after the Early Cretaceous amalgamation between the North China Block (e.g., China, Korea, and Japan) and the paleo-Eurasia continent. This postorogenic event was accompanied by the initial formation of voluminous igneous activity and subsequent basin formation at about 130-110 Ma. Crustal relaxation during this stage should be related to this postorogenic event and is attributed to paleo-Pacific Plate subduction. This result provides important clues for the Cretaceous tectonic evolution of Northeast Asia in the context of plate convergence.

Original languageEnglish
Pages (from-to)625-646
Number of pages22
JournalJournal of Geology
Volume120
Issue number6
DOIs
Publication statusPublished - 2012 Nov 19

Fingerprint

Cretaceous
tectonics
subduction
zircon
plate convergence
delamination
ion microprobe
Pacific plate
basin evolution
tectonic evolution
rock
pluton
magmatism
biotite
plagioclase
slab
rare earth element
isotopic composition
Jurassic
magma

All Science Journal Classification (ASJC) codes

  • Geology

Cite this

Kim, Sung Won ; Kwon, Sanghoon ; Ryu, In Chang ; Jeong, Youn Joong ; Choi, Sung Ja ; Kee, Weon Seo ; Yi, Keewook ; Lee, Youn Soo ; Kim, Bok Chul ; Park, Deok Won. / Characteristics of the early cretaceous igneous activity in the Korean Peninsula and tectonic implications. In: Journal of Geology. 2012 ; Vol. 120, No. 6. pp. 625-646.
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abstract = "This study presents sensitive high-resolution ion microprobe (SHRIMP) U-Pb zircon ages, K-Ar ages, and whole-rock chemical and isotopic (Sr-Nd) compositions of the Early Cretaceous igneous activity in western South Korea. The volcanics and plutons yield zircon U-Pb ages of ca. 110 Ma, in the Albian of the late Early Cretaceous. K-Ar biotite and plagioclase ages are slightly younger, ca. 103 Ma. The geochemical signatures of the rocks are characterized by negative Nb, Ta, and Ti anomalies, relatively low ε Nd(T) values (between -15.91 and -9.36), and enrichment in light rare earth elements, suggesting the effects of subduction-related magmatism. Together with the Sr and Nd isotopic compositions of the intermediate to acid volcanics, geochemical characteristics reflect a lower-crustal magma source. This Albian event over the Korean Peninsula is related to Early Jurassic subduction and subsequent lithospheric delamination and/or slab rollback after the Early Cretaceous amalgamation between the North China Block (e.g., China, Korea, and Japan) and the paleo-Eurasia continent. This postorogenic event was accompanied by the initial formation of voluminous igneous activity and subsequent basin formation at about 130-110 Ma. Crustal relaxation during this stage should be related to this postorogenic event and is attributed to paleo-Pacific Plate subduction. This result provides important clues for the Cretaceous tectonic evolution of Northeast Asia in the context of plate convergence.",
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Kim, SW, Kwon, S, Ryu, IC, Jeong, YJ, Choi, SJ, Kee, WS, Yi, K, Lee, YS, Kim, BC & Park, DW 2012, 'Characteristics of the early cretaceous igneous activity in the Korean Peninsula and tectonic implications', Journal of Geology, vol. 120, no. 6, pp. 625-646. https://doi.org/10.1086/667811

Characteristics of the early cretaceous igneous activity in the Korean Peninsula and tectonic implications. / Kim, Sung Won; Kwon, Sanghoon; Ryu, In Chang; Jeong, Youn Joong; Choi, Sung Ja; Kee, Weon Seo; Yi, Keewook; Lee, Youn Soo; Kim, Bok Chul; Park, Deok Won.

In: Journal of Geology, Vol. 120, No. 6, 19.11.2012, p. 625-646.

Research output: Contribution to journalArticle

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T1 - Characteristics of the early cretaceous igneous activity in the Korean Peninsula and tectonic implications

AU - Kim, Sung Won

AU - Kwon, Sanghoon

AU - Ryu, In Chang

AU - Jeong, Youn Joong

AU - Choi, Sung Ja

AU - Kee, Weon Seo

AU - Yi, Keewook

AU - Lee, Youn Soo

AU - Kim, Bok Chul

AU - Park, Deok Won

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N2 - This study presents sensitive high-resolution ion microprobe (SHRIMP) U-Pb zircon ages, K-Ar ages, and whole-rock chemical and isotopic (Sr-Nd) compositions of the Early Cretaceous igneous activity in western South Korea. The volcanics and plutons yield zircon U-Pb ages of ca. 110 Ma, in the Albian of the late Early Cretaceous. K-Ar biotite and plagioclase ages are slightly younger, ca. 103 Ma. The geochemical signatures of the rocks are characterized by negative Nb, Ta, and Ti anomalies, relatively low ε Nd(T) values (between -15.91 and -9.36), and enrichment in light rare earth elements, suggesting the effects of subduction-related magmatism. Together with the Sr and Nd isotopic compositions of the intermediate to acid volcanics, geochemical characteristics reflect a lower-crustal magma source. This Albian event over the Korean Peninsula is related to Early Jurassic subduction and subsequent lithospheric delamination and/or slab rollback after the Early Cretaceous amalgamation between the North China Block (e.g., China, Korea, and Japan) and the paleo-Eurasia continent. This postorogenic event was accompanied by the initial formation of voluminous igneous activity and subsequent basin formation at about 130-110 Ma. Crustal relaxation during this stage should be related to this postorogenic event and is attributed to paleo-Pacific Plate subduction. This result provides important clues for the Cretaceous tectonic evolution of Northeast Asia in the context of plate convergence.

AB - This study presents sensitive high-resolution ion microprobe (SHRIMP) U-Pb zircon ages, K-Ar ages, and whole-rock chemical and isotopic (Sr-Nd) compositions of the Early Cretaceous igneous activity in western South Korea. The volcanics and plutons yield zircon U-Pb ages of ca. 110 Ma, in the Albian of the late Early Cretaceous. K-Ar biotite and plagioclase ages are slightly younger, ca. 103 Ma. The geochemical signatures of the rocks are characterized by negative Nb, Ta, and Ti anomalies, relatively low ε Nd(T) values (between -15.91 and -9.36), and enrichment in light rare earth elements, suggesting the effects of subduction-related magmatism. Together with the Sr and Nd isotopic compositions of the intermediate to acid volcanics, geochemical characteristics reflect a lower-crustal magma source. This Albian event over the Korean Peninsula is related to Early Jurassic subduction and subsequent lithospheric delamination and/or slab rollback after the Early Cretaceous amalgamation between the North China Block (e.g., China, Korea, and Japan) and the paleo-Eurasia continent. This postorogenic event was accompanied by the initial formation of voluminous igneous activity and subsequent basin formation at about 130-110 Ma. Crustal relaxation during this stage should be related to this postorogenic event and is attributed to paleo-Pacific Plate subduction. This result provides important clues for the Cretaceous tectonic evolution of Northeast Asia in the context of plate convergence.

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