Zircon U-Pb and Lu-Hf isotopic constraints on Archean crustal evolution in the Liaonan Complex of northeast China

En Meng, Fu Lai Liu, Jian Hui Liu, Ping Hua Liu, Ying Cui, Chao Hui Liu, Hong Yang, Fang Wang, Jian Rong Shi, Qing Bo Kong, Tao Lian

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Abstract

The Changhai area is located in the southeastern part of the Liaonan Complex within the Eastern Block of the North China Craton (NCC) in China. Early Precambrian rocks in this area consist mainly of various types of gneisses and schists. We present cathodoluminescence images, U-Pb dates, and trace element and Hf isotope data for zircons from these rocks in order to constrain the formation and evolution of continental crust in the Liaonan Complex. Our results show that the magmatic precursors of the biotite monzonitic gneiss, granitic gneiss, garnet-bearing monzogranitic gneiss, and biotite granodioritic gneiss, that is, relatively sodium-rich gneisses in the area, were emplaced at ca. 2543Ma. Muscovite-bearing granitic gneiss, monzogranitic gneiss, and biotite granitic gneiss, that is, relatively potassium-rich gneisses in the area, were emplaced at ca. 2516Ma, whereas the sedimentary protolith(s) of the associated schists along the gneissose fabric of the gneisses were deposited after 2518Ma and metamorphosed at ca. 1885Ma. The latter age may represent the time of metamorphism of the South Liaohe Group in the Jiao-Liao-Ji Belt. Large numbers of inherited zircons with ages of 2596-2842Ma, coupled with the results of previous studies, suggest that multiple Meso- to Neoarchean magmatic events took place in the Liaonan Complex at ca. 2.84, 2.75, 2.67-2.61, 2.54, and 2.51Ga. Lu-Hf isotopic results for magmatic zircon grains with ages of 2.61-2.84Ga have positive εHf values (+2.4 to +11.3) and average continental crust model ages (TC DM) of 2.63-3.05Ga with a peak at 2.76-2.98Ga. Of the zircons with ages of ca. 2.54Ga and 2.51Ga, 94% have positive εHf values (+0.13 to +8.57, average=+3.1) and TC DM model ages of 2.53-3.06Ga, similar to those of zircons with ages of ca. 2.61-2.84Ga, suggesting that both sets of zircons were derived from partial melting of juvenile crust. However, the remaining zircons (6%) with ages of 2.54-2.51Ga and all metamorphic zircon grains with ages of ca. 1885Ma have negative εHf values of -0.12 to -3.00 and -8.8 to -15.9, respectively, and similar older TC DM model ages of 3.11-3.56Ga and 3.08-3.23Ga, respectively. These data, combined with those from previous studies of the NCC, indicate that the basement rocks of the Liaonan Complex underwent two significant juvenile crustal growth events at ca. 2.71-2.99Ga and 2.54-2.51Ga, a local reworking event at ca. 2.51Ga, and a major reworking event at 1.88Ga.

Original languageEnglish
Pages (from-to)164-183
Number of pages20
JournalLithos
Volume177
DOIs
StatePublished - 1 Sep 2013

Fingerprint

crustal evolution
Archean
zircon
gneiss
Bearings (structural)
Rocks
biotite
reworking
schist
continental crust
craton
Cathodoluminescence
Garnets
Trace Elements
Isotopes
cathodoluminescence
Potassium
basement rock
Melting
protolith

Keywords

  • Crustal growth
  • Gneiss
  • Liaonan Complex
  • Reworking
  • Schist
  • Zircon U-Pb-Hf isotopes

Cite this

Meng, En ; Liu, Fu Lai ; Liu, Jian Hui ; Liu, Ping Hua ; Cui, Ying ; Liu, Chao Hui ; Yang, Hong ; Wang, Fang ; Shi, Jian Rong ; Kong, Qing Bo ; Lian, Tao. / Zircon U-Pb and Lu-Hf isotopic constraints on Archean crustal evolution in the Liaonan Complex of northeast China. In: Lithos. 2013 ; Vol. 177. pp. 164-183.
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abstract = "The Changhai area is located in the southeastern part of the Liaonan Complex within the Eastern Block of the North China Craton (NCC) in China. Early Precambrian rocks in this area consist mainly of various types of gneisses and schists. We present cathodoluminescence images, U-Pb dates, and trace element and Hf isotope data for zircons from these rocks in order to constrain the formation and evolution of continental crust in the Liaonan Complex. Our results show that the magmatic precursors of the biotite monzonitic gneiss, granitic gneiss, garnet-bearing monzogranitic gneiss, and biotite granodioritic gneiss, that is, relatively sodium-rich gneisses in the area, were emplaced at ca. 2543Ma. Muscovite-bearing granitic gneiss, monzogranitic gneiss, and biotite granitic gneiss, that is, relatively potassium-rich gneisses in the area, were emplaced at ca. 2516Ma, whereas the sedimentary protolith(s) of the associated schists along the gneissose fabric of the gneisses were deposited after 2518Ma and metamorphosed at ca. 1885Ma. The latter age may represent the time of metamorphism of the South Liaohe Group in the Jiao-Liao-Ji Belt. Large numbers of inherited zircons with ages of 2596-2842Ma, coupled with the results of previous studies, suggest that multiple Meso- to Neoarchean magmatic events took place in the Liaonan Complex at ca. 2.84, 2.75, 2.67-2.61, 2.54, and 2.51Ga. Lu-Hf isotopic results for magmatic zircon grains with ages of 2.61-2.84Ga have positive εHf values (+2.4 to +11.3) and average continental crust model ages (TC DM) of 2.63-3.05Ga with a peak at 2.76-2.98Ga. Of the zircons with ages of ca. 2.54Ga and 2.51Ga, 94{\%} have positive εHf values (+0.13 to +8.57, average=+3.1) and TC DM model ages of 2.53-3.06Ga, similar to those of zircons with ages of ca. 2.61-2.84Ga, suggesting that both sets of zircons were derived from partial melting of juvenile crust. However, the remaining zircons (6{\%}) with ages of 2.54-2.51Ga and all metamorphic zircon grains with ages of ca. 1885Ma have negative εHf values of -0.12 to -3.00 and -8.8 to -15.9, respectively, and similar older TC DM model ages of 3.11-3.56Ga and 3.08-3.23Ga, respectively. These data, combined with those from previous studies of the NCC, indicate that the basement rocks of the Liaonan Complex underwent two significant juvenile crustal growth events at ca. 2.71-2.99Ga and 2.54-2.51Ga, a local reworking event at ca. 2.51Ga, and a major reworking event at 1.88Ga.",
keywords = "Crustal growth, Gneiss, Liaonan Complex, Reworking, Schist, Zircon U-Pb-Hf isotopes",
author = "En Meng and Liu, {Fu Lai} and Liu, {Jian Hui} and Liu, {Ping Hua} and Ying Cui and Liu, {Chao Hui} and Hong Yang and Fang Wang and Shi, {Jian Rong} and Kong, {Qing Bo} and Tao Lian",
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Meng, E, Liu, FL, Liu, JH, Liu, PH, Cui, Y, Liu, CH, Yang, H, Wang, F, Shi, JR, Kong, QB & Lian, T 2013, 'Zircon U-Pb and Lu-Hf isotopic constraints on Archean crustal evolution in the Liaonan Complex of northeast China', Lithos, vol. 177, pp. 164-183. https://doi.org/10.1016/j.lithos.2013.06.020

Zircon U-Pb and Lu-Hf isotopic constraints on Archean crustal evolution in the Liaonan Complex of northeast China. / Meng, En; Liu, Fu Lai; Liu, Jian Hui; Liu, Ping Hua; Cui, Ying; Liu, Chao Hui; Yang, Hong; Wang, Fang; Shi, Jian Rong; Kong, Qing Bo; Lian, Tao.

In: Lithos, Vol. 177, 01.09.2013, p. 164-183.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Zircon U-Pb and Lu-Hf isotopic constraints on Archean crustal evolution in the Liaonan Complex of northeast China

AU - Meng, En

AU - Liu, Fu Lai

AU - Liu, Jian Hui

AU - Liu, Ping Hua

AU - Cui, Ying

AU - Liu, Chao Hui

AU - Yang, Hong

AU - Wang, Fang

AU - Shi, Jian Rong

AU - Kong, Qing Bo

AU - Lian, Tao

PY - 2013/9/1

Y1 - 2013/9/1

N2 - The Changhai area is located in the southeastern part of the Liaonan Complex within the Eastern Block of the North China Craton (NCC) in China. Early Precambrian rocks in this area consist mainly of various types of gneisses and schists. We present cathodoluminescence images, U-Pb dates, and trace element and Hf isotope data for zircons from these rocks in order to constrain the formation and evolution of continental crust in the Liaonan Complex. Our results show that the magmatic precursors of the biotite monzonitic gneiss, granitic gneiss, garnet-bearing monzogranitic gneiss, and biotite granodioritic gneiss, that is, relatively sodium-rich gneisses in the area, were emplaced at ca. 2543Ma. Muscovite-bearing granitic gneiss, monzogranitic gneiss, and biotite granitic gneiss, that is, relatively potassium-rich gneisses in the area, were emplaced at ca. 2516Ma, whereas the sedimentary protolith(s) of the associated schists along the gneissose fabric of the gneisses were deposited after 2518Ma and metamorphosed at ca. 1885Ma. The latter age may represent the time of metamorphism of the South Liaohe Group in the Jiao-Liao-Ji Belt. Large numbers of inherited zircons with ages of 2596-2842Ma, coupled with the results of previous studies, suggest that multiple Meso- to Neoarchean magmatic events took place in the Liaonan Complex at ca. 2.84, 2.75, 2.67-2.61, 2.54, and 2.51Ga. Lu-Hf isotopic results for magmatic zircon grains with ages of 2.61-2.84Ga have positive εHf values (+2.4 to +11.3) and average continental crust model ages (TC DM) of 2.63-3.05Ga with a peak at 2.76-2.98Ga. Of the zircons with ages of ca. 2.54Ga and 2.51Ga, 94% have positive εHf values (+0.13 to +8.57, average=+3.1) and TC DM model ages of 2.53-3.06Ga, similar to those of zircons with ages of ca. 2.61-2.84Ga, suggesting that both sets of zircons were derived from partial melting of juvenile crust. However, the remaining zircons (6%) with ages of 2.54-2.51Ga and all metamorphic zircon grains with ages of ca. 1885Ma have negative εHf values of -0.12 to -3.00 and -8.8 to -15.9, respectively, and similar older TC DM model ages of 3.11-3.56Ga and 3.08-3.23Ga, respectively. These data, combined with those from previous studies of the NCC, indicate that the basement rocks of the Liaonan Complex underwent two significant juvenile crustal growth events at ca. 2.71-2.99Ga and 2.54-2.51Ga, a local reworking event at ca. 2.51Ga, and a major reworking event at 1.88Ga.

AB - The Changhai area is located in the southeastern part of the Liaonan Complex within the Eastern Block of the North China Craton (NCC) in China. Early Precambrian rocks in this area consist mainly of various types of gneisses and schists. We present cathodoluminescence images, U-Pb dates, and trace element and Hf isotope data for zircons from these rocks in order to constrain the formation and evolution of continental crust in the Liaonan Complex. Our results show that the magmatic precursors of the biotite monzonitic gneiss, granitic gneiss, garnet-bearing monzogranitic gneiss, and biotite granodioritic gneiss, that is, relatively sodium-rich gneisses in the area, were emplaced at ca. 2543Ma. Muscovite-bearing granitic gneiss, monzogranitic gneiss, and biotite granitic gneiss, that is, relatively potassium-rich gneisses in the area, were emplaced at ca. 2516Ma, whereas the sedimentary protolith(s) of the associated schists along the gneissose fabric of the gneisses were deposited after 2518Ma and metamorphosed at ca. 1885Ma. The latter age may represent the time of metamorphism of the South Liaohe Group in the Jiao-Liao-Ji Belt. Large numbers of inherited zircons with ages of 2596-2842Ma, coupled with the results of previous studies, suggest that multiple Meso- to Neoarchean magmatic events took place in the Liaonan Complex at ca. 2.84, 2.75, 2.67-2.61, 2.54, and 2.51Ga. Lu-Hf isotopic results for magmatic zircon grains with ages of 2.61-2.84Ga have positive εHf values (+2.4 to +11.3) and average continental crust model ages (TC DM) of 2.63-3.05Ga with a peak at 2.76-2.98Ga. Of the zircons with ages of ca. 2.54Ga and 2.51Ga, 94% have positive εHf values (+0.13 to +8.57, average=+3.1) and TC DM model ages of 2.53-3.06Ga, similar to those of zircons with ages of ca. 2.61-2.84Ga, suggesting that both sets of zircons were derived from partial melting of juvenile crust. However, the remaining zircons (6%) with ages of 2.54-2.51Ga and all metamorphic zircon grains with ages of ca. 1885Ma have negative εHf values of -0.12 to -3.00 and -8.8 to -15.9, respectively, and similar older TC DM model ages of 3.11-3.56Ga and 3.08-3.23Ga, respectively. These data, combined with those from previous studies of the NCC, indicate that the basement rocks of the Liaonan Complex underwent two significant juvenile crustal growth events at ca. 2.71-2.99Ga and 2.54-2.51Ga, a local reworking event at ca. 2.51Ga, and a major reworking event at 1.88Ga.

KW - Crustal growth

KW - Gneiss

KW - Liaonan Complex

KW - Reworking

KW - Schist

KW - Zircon U-Pb-Hf isotopes

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U2 - 10.1016/j.lithos.2013.06.020

DO - 10.1016/j.lithos.2013.06.020

M3 - Article

VL - 177

SP - 164

EP - 183

JO - Lithos

JF - Lithos

SN - 0024-4937

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