Permo-Triassic evolution of the southern margin of the Central Asian Orogenic Belt revisited : Insights from Late Permian igneous suite in the Daheishan Horst, NE China

Zhi Gang SONG, Zuo Zhen HAN*, Li Hua GAO, Hong Yan GENG, Xu Ping LI, Fan Xue MENG, Mei HAN, Wen Jian ZHONG, Jing Jing LI, Qing Xiang DU, Jun Lei YAN, Hui LIU

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)Researchpeer-review

12 Citations (Scopus)

Abstract

The Daheishan Horst in Jilin Province, NE China, is the key geological unit that links the Solonker-Xar Moron-Changchun and Changchun-Yanji sutures, which are generally interpreted to mark the zone of closure of the Paleo-Asian Ocean along the southeastern margin of the Central Asian Orogenic Belt (CAOB). Here we investigate a suite of volcanic rocks from Daheishan and the Doushantouzi syenogranite intrusion to gain insights into the Permian–Triassic tectonic evolution of the eastern segment of the Paleo-Asian Ocean. Zircon U-Pb data and zircon rare earth element (REE) patterns indicate that the igneous suite formed during the Late Permian (ca. 253–256 Ma) and underwent late-stage alteration during Early Triassic tectono-thermal events. The presence of older magmatic zircon grains in this igneous suite suggest multiple pulses of magmatism during the Permian in this region. The Daheishan volcanic rocks predominantly consist of intermediate-felsic rocks, including andesite, rhyodacite and rhyolite with minor basaltic lava. Geochemically, the basaltic rocks belong to calc-alkaline series, whereas the intermediate-felsic rocks classify as calc-alkaline to high-K calc-alkaline series. The Doushantouzi syenogranites belong to peraluminous I-type granites, with the A/CNK ratio between 1.06 and 1.15. All these rocks have an arc-like affinity with enriched light rare earth elements (LREE) and large ion lithophile elements (LILE; e.g. Rb, Ba and U) and depleted high field strength elements (HFSE; e.g. Nb, Ta and Ti). The Daheishan intermediate-felsic rocks and Doushantouzi syenogranites have higher SiO2 contents but lower MgO contents and Mg# values and plot within the field of experimentally derived partial melts from metabasaltic rocks in MgO vs. SiO2 diagram. These geochemical features, together with the positive εNd(t) (+ 1.6 to + 4.6) and εHf(t) (+ 1.53 to + 7.41) values of zircon grains, indicate that the primary magma of these intermediate-felsic rocks likely originated from the partial melting of a juvenile metabasaltic lower crust. In contrast, the basaltic lavas were probably derived from the partial melting of a depleted mantle wedge that was metasomatized by fluids from a subducted slab, as suggested by their low initial 87Sr/86Sr ratios and depleted εNd(t) (+ 3.6 to + 4.4) values. These data, in conjunction with regional geological investigations, suggest that formation of this Late Permian igneous suite was related to the northward subduction of the Paleo-Asian oceanic plate beneath the Songliao-Xilinhot block and that the eastern segment of the Paleo-Asian Ocean did not close before the Late Permian.

Original languageEnglish
Pages (from-to)23-50
Number of pages28
JournalGondwana Research
Volume56
DOIs
Publication statusPublished - Apr 2018
Externally publishedYes

Fingerprint

horst
felsic rock
orogenic belt
Permian
zircon
Triassic
partial melting
volcanic rock
rare earth element
ocean
rock
rhyolite
tectonic evolution
andesite
lava
lower crust
magmatism
slab
subduction
diagram

Keywords

  • Geochemistry
  • Paleo-Asian Ocean
  • Permian igneous suite
  • Tectonic setting
  • Zircon geochronology

Cite this

SONG, Zhi Gang ; HAN, Zuo Zhen ; GAO, Li Hua ; GENG, Hong Yan ; LI, Xu Ping ; MENG, Fan Xue ; HAN, Mei ; ZHONG, Wen Jian ; LI, Jing Jing ; DU, Qing Xiang ; YAN, Jun Lei ; LIU, Hui. / Permo-Triassic evolution of the southern margin of the Central Asian Orogenic Belt revisited : Insights from Late Permian igneous suite in the Daheishan Horst, NE China. In: Gondwana Research. 2018 ; Vol. 56. pp. 23-50.
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abstract = "The Daheishan Horst in Jilin Province, NE China, is the key geological unit that links the Solonker-Xar Moron-Changchun and Changchun-Yanji sutures, which are generally interpreted to mark the zone of closure of the Paleo-Asian Ocean along the southeastern margin of the Central Asian Orogenic Belt (CAOB). Here we investigate a suite of volcanic rocks from Daheishan and the Doushantouzi syenogranite intrusion to gain insights into the Permian–Triassic tectonic evolution of the eastern segment of the Paleo-Asian Ocean. Zircon U-Pb data and zircon rare earth element (REE) patterns indicate that the igneous suite formed during the Late Permian (ca. 253–256 Ma) and underwent late-stage alteration during Early Triassic tectono-thermal events. The presence of older magmatic zircon grains in this igneous suite suggest multiple pulses of magmatism during the Permian in this region. The Daheishan volcanic rocks predominantly consist of intermediate-felsic rocks, including andesite, rhyodacite and rhyolite with minor basaltic lava. Geochemically, the basaltic rocks belong to calc-alkaline series, whereas the intermediate-felsic rocks classify as calc-alkaline to high-K calc-alkaline series. The Doushantouzi syenogranites belong to peraluminous I-type granites, with the A/CNK ratio between 1.06 and 1.15. All these rocks have an arc-like affinity with enriched light rare earth elements (LREE) and large ion lithophile elements (LILE; e.g. Rb, Ba and U) and depleted high field strength elements (HFSE; e.g. Nb, Ta and Ti). The Daheishan intermediate-felsic rocks and Doushantouzi syenogranites have higher SiO2 contents but lower MgO contents and Mg# values and plot within the field of experimentally derived partial melts from metabasaltic rocks in MgO vs. SiO2 diagram. These geochemical features, together with the positive εNd(t) (+ 1.6 to + 4.6) and εHf(t) (+ 1.53 to + 7.41) values of zircon grains, indicate that the primary magma of these intermediate-felsic rocks likely originated from the partial melting of a juvenile metabasaltic lower crust. In contrast, the basaltic lavas were probably derived from the partial melting of a depleted mantle wedge that was metasomatized by fluids from a subducted slab, as suggested by their low initial 87Sr/86Sr ratios and depleted εNd(t) (+ 3.6 to + 4.4) values. These data, in conjunction with regional geological investigations, suggest that formation of this Late Permian igneous suite was related to the northward subduction of the Paleo-Asian oceanic plate beneath the Songliao-Xilinhot block and that the eastern segment of the Paleo-Asian Ocean did not close before the Late Permian.",
keywords = "Geochemistry, Paleo-Asian Ocean, Permian igneous suite, Tectonic setting, Zircon geochronology",
author = "SONG, {Zhi Gang} and HAN, {Zuo Zhen} and GAO, {Li Hua} and GENG, {Hong Yan} and LI, {Xu Ping} and MENG, {Fan Xue} and Mei HAN and ZHONG, {Wen Jian} and LI, {Jing Jing} and DU, {Qing Xiang} and YAN, {Jun Lei} and Hui LIU",
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Permo-Triassic evolution of the southern margin of the Central Asian Orogenic Belt revisited : Insights from Late Permian igneous suite in the Daheishan Horst, NE China. / SONG, Zhi Gang; HAN, Zuo Zhen; GAO, Li Hua; GENG, Hong Yan; LI, Xu Ping; MENG, Fan Xue; HAN, Mei; ZHONG, Wen Jian; LI, Jing Jing; DU, Qing Xiang; YAN, Jun Lei; LIU, Hui.

In: Gondwana Research, Vol. 56, 04.2018, p. 23-50.

Research output: Journal PublicationsJournal Article (refereed)Researchpeer-review

TY - JOUR

T1 - Permo-Triassic evolution of the southern margin of the Central Asian Orogenic Belt revisited : Insights from Late Permian igneous suite in the Daheishan Horst, NE China

AU - SONG, Zhi Gang

AU - HAN, Zuo Zhen

AU - GAO, Li Hua

AU - GENG, Hong Yan

AU - LI, Xu Ping

AU - MENG, Fan Xue

AU - HAN, Mei

AU - ZHONG, Wen Jian

AU - LI, Jing Jing

AU - DU, Qing Xiang

AU - YAN, Jun Lei

AU - LIU, Hui

PY - 2018/4

Y1 - 2018/4

N2 - The Daheishan Horst in Jilin Province, NE China, is the key geological unit that links the Solonker-Xar Moron-Changchun and Changchun-Yanji sutures, which are generally interpreted to mark the zone of closure of the Paleo-Asian Ocean along the southeastern margin of the Central Asian Orogenic Belt (CAOB). Here we investigate a suite of volcanic rocks from Daheishan and the Doushantouzi syenogranite intrusion to gain insights into the Permian–Triassic tectonic evolution of the eastern segment of the Paleo-Asian Ocean. Zircon U-Pb data and zircon rare earth element (REE) patterns indicate that the igneous suite formed during the Late Permian (ca. 253–256 Ma) and underwent late-stage alteration during Early Triassic tectono-thermal events. The presence of older magmatic zircon grains in this igneous suite suggest multiple pulses of magmatism during the Permian in this region. The Daheishan volcanic rocks predominantly consist of intermediate-felsic rocks, including andesite, rhyodacite and rhyolite with minor basaltic lava. Geochemically, the basaltic rocks belong to calc-alkaline series, whereas the intermediate-felsic rocks classify as calc-alkaline to high-K calc-alkaline series. The Doushantouzi syenogranites belong to peraluminous I-type granites, with the A/CNK ratio between 1.06 and 1.15. All these rocks have an arc-like affinity with enriched light rare earth elements (LREE) and large ion lithophile elements (LILE; e.g. Rb, Ba and U) and depleted high field strength elements (HFSE; e.g. Nb, Ta and Ti). The Daheishan intermediate-felsic rocks and Doushantouzi syenogranites have higher SiO2 contents but lower MgO contents and Mg# values and plot within the field of experimentally derived partial melts from metabasaltic rocks in MgO vs. SiO2 diagram. These geochemical features, together with the positive εNd(t) (+ 1.6 to + 4.6) and εHf(t) (+ 1.53 to + 7.41) values of zircon grains, indicate that the primary magma of these intermediate-felsic rocks likely originated from the partial melting of a juvenile metabasaltic lower crust. In contrast, the basaltic lavas were probably derived from the partial melting of a depleted mantle wedge that was metasomatized by fluids from a subducted slab, as suggested by their low initial 87Sr/86Sr ratios and depleted εNd(t) (+ 3.6 to + 4.4) values. These data, in conjunction with regional geological investigations, suggest that formation of this Late Permian igneous suite was related to the northward subduction of the Paleo-Asian oceanic plate beneath the Songliao-Xilinhot block and that the eastern segment of the Paleo-Asian Ocean did not close before the Late Permian.

AB - The Daheishan Horst in Jilin Province, NE China, is the key geological unit that links the Solonker-Xar Moron-Changchun and Changchun-Yanji sutures, which are generally interpreted to mark the zone of closure of the Paleo-Asian Ocean along the southeastern margin of the Central Asian Orogenic Belt (CAOB). Here we investigate a suite of volcanic rocks from Daheishan and the Doushantouzi syenogranite intrusion to gain insights into the Permian–Triassic tectonic evolution of the eastern segment of the Paleo-Asian Ocean. Zircon U-Pb data and zircon rare earth element (REE) patterns indicate that the igneous suite formed during the Late Permian (ca. 253–256 Ma) and underwent late-stage alteration during Early Triassic tectono-thermal events. The presence of older magmatic zircon grains in this igneous suite suggest multiple pulses of magmatism during the Permian in this region. The Daheishan volcanic rocks predominantly consist of intermediate-felsic rocks, including andesite, rhyodacite and rhyolite with minor basaltic lava. Geochemically, the basaltic rocks belong to calc-alkaline series, whereas the intermediate-felsic rocks classify as calc-alkaline to high-K calc-alkaline series. The Doushantouzi syenogranites belong to peraluminous I-type granites, with the A/CNK ratio between 1.06 and 1.15. All these rocks have an arc-like affinity with enriched light rare earth elements (LREE) and large ion lithophile elements (LILE; e.g. Rb, Ba and U) and depleted high field strength elements (HFSE; e.g. Nb, Ta and Ti). The Daheishan intermediate-felsic rocks and Doushantouzi syenogranites have higher SiO2 contents but lower MgO contents and Mg# values and plot within the field of experimentally derived partial melts from metabasaltic rocks in MgO vs. SiO2 diagram. These geochemical features, together with the positive εNd(t) (+ 1.6 to + 4.6) and εHf(t) (+ 1.53 to + 7.41) values of zircon grains, indicate that the primary magma of these intermediate-felsic rocks likely originated from the partial melting of a juvenile metabasaltic lower crust. In contrast, the basaltic lavas were probably derived from the partial melting of a depleted mantle wedge that was metasomatized by fluids from a subducted slab, as suggested by their low initial 87Sr/86Sr ratios and depleted εNd(t) (+ 3.6 to + 4.4) values. These data, in conjunction with regional geological investigations, suggest that formation of this Late Permian igneous suite was related to the northward subduction of the Paleo-Asian oceanic plate beneath the Songliao-Xilinhot block and that the eastern segment of the Paleo-Asian Ocean did not close before the Late Permian.

KW - Geochemistry

KW - Paleo-Asian Ocean

KW - Permian igneous suite

KW - Tectonic setting

KW - Zircon geochronology

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DO - 10.1016/j.gr.2017.12.005

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VL - 56

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JO - Gondwana Research

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SN - 1342-937X

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