Zircon Hf isotopes and geochemistry of the early paleoproterozoic high-Sr low-y quartz-diorite in the Quanji massif, NW China : Crustal growth and tectonic implications

Songlin GONG*, Nengsong CHEN, Hongyan GENG, Min SUN, Lu ZHANG, Qinyan WANG

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)

19 Citations (Scopus)

Abstract

The metamorphosed Early Paleoproterozoic granitoids in the Quanji massif, Northwestern China provide constraints for relationship between the Tarim Craton and North China Craton. Among granitoids batholiths, rocks of the Mohe quartz-diorite show typically adakitic geochemical characteristics, with medium K2O/Na2O ratios (0.56-1.17) and high Sr (519-619 ppm) low Y (9.37-20.40 ppm) and Yb (0.97-1.77 ppm) concentrations. The rocks have e{open} Nd(t) values between +2.4 and +4.4 and depleted mantle Nd model ages of 2.43-2.59 Ga. The magmatic zircons have positive e{open} Hf(t) values ranging from +0.40 to +7.60 and depleted mantle Hf model ages of 2.43-2.70 Ga, with major peaks at ∼2.54 and ∼2.65 Ga. The geochemical and Nd-Hf isotopic characteristics indicate that the Mohe quartz-dioritic rocks might be formed by partial melting of high-pressure metamorphosed juvenile crustal rocks in post-orogenic extensional regime in the Early Paleoproterozoic. It suggests that important crustal growth occurred in the Quanji massif and the Tarim Craton at ∼2.4 and 2.5-2.7 Ga. The Quanji massif and Tarim Craton might share a similar crustal evolution history with the North China Craton in the Neoarchean.

Original languageEnglish
Pages (from-to)74-86
Number of pages13
JournalJournal of Earth Science
Volume25
Issue number1
Early online date24 Jan 2014
DOIs
Publication statusPublished - Feb 2014
Externally publishedYes

Fingerprint

diorite
craton
zircon
geochemistry
isotope
quartz
tectonics
rock
mantle
crustal evolution
partial melting
history

Keywords

  • crustal growth
  • high-Sr and low-Y granitoid
  • North China Craton
  • Quanji massif
  • Tarim Craton
  • zircon Hf isotope

Cite this

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title = "Zircon Hf isotopes and geochemistry of the early paleoproterozoic high-Sr low-y quartz-diorite in the Quanji massif, NW China : Crustal growth and tectonic implications",
abstract = "The metamorphosed Early Paleoproterozoic granitoids in the Quanji massif, Northwestern China provide constraints for relationship between the Tarim Craton and North China Craton. Among granitoids batholiths, rocks of the Mohe quartz-diorite show typically adakitic geochemical characteristics, with medium K2O/Na2O ratios (0.56-1.17) and high Sr (519-619 ppm) low Y (9.37-20.40 ppm) and Yb (0.97-1.77 ppm) concentrations. The rocks have e{open} Nd(t) values between +2.4 and +4.4 and depleted mantle Nd model ages of 2.43-2.59 Ga. The magmatic zircons have positive e{open} Hf(t) values ranging from +0.40 to +7.60 and depleted mantle Hf model ages of 2.43-2.70 Ga, with major peaks at ∼2.54 and ∼2.65 Ga. The geochemical and Nd-Hf isotopic characteristics indicate that the Mohe quartz-dioritic rocks might be formed by partial melting of high-pressure metamorphosed juvenile crustal rocks in post-orogenic extensional regime in the Early Paleoproterozoic. It suggests that important crustal growth occurred in the Quanji massif and the Tarim Craton at ∼2.4 and 2.5-2.7 Ga. The Quanji massif and Tarim Craton might share a similar crustal evolution history with the North China Craton in the Neoarchean.",
keywords = "crustal growth, high-Sr and low-Y granitoid, North China Craton, Quanji massif, Tarim Craton, zircon Hf isotope",
author = "Songlin GONG and Nengsong CHEN and Hongyan GENG and Min SUN and Lu ZHANG and Qinyan WANG",
year = "2014",
month = "2",
doi = "10.1007/s12583-014-0401-2",
language = "English",
volume = "25",
pages = "74--86",
journal = "Journal of Earth Science",
issn = "1674-487X",
publisher = "China University of Geosciences",
number = "1",

}

Zircon Hf isotopes and geochemistry of the early paleoproterozoic high-Sr low-y quartz-diorite in the Quanji massif, NW China : Crustal growth and tectonic implications. / GONG, Songlin; CHEN, Nengsong; GENG, Hongyan; SUN, Min; ZHANG, Lu; WANG, Qinyan.

In: Journal of Earth Science, Vol. 25, No. 1, 02.2014, p. 74-86.

Research output: Journal PublicationsJournal Article (refereed)

TY - JOUR

T1 - Zircon Hf isotopes and geochemistry of the early paleoproterozoic high-Sr low-y quartz-diorite in the Quanji massif, NW China : Crustal growth and tectonic implications

AU - GONG, Songlin

AU - CHEN, Nengsong

AU - GENG, Hongyan

AU - SUN, Min

AU - ZHANG, Lu

AU - WANG, Qinyan

PY - 2014/2

Y1 - 2014/2

N2 - The metamorphosed Early Paleoproterozoic granitoids in the Quanji massif, Northwestern China provide constraints for relationship between the Tarim Craton and North China Craton. Among granitoids batholiths, rocks of the Mohe quartz-diorite show typically adakitic geochemical characteristics, with medium K2O/Na2O ratios (0.56-1.17) and high Sr (519-619 ppm) low Y (9.37-20.40 ppm) and Yb (0.97-1.77 ppm) concentrations. The rocks have e{open} Nd(t) values between +2.4 and +4.4 and depleted mantle Nd model ages of 2.43-2.59 Ga. The magmatic zircons have positive e{open} Hf(t) values ranging from +0.40 to +7.60 and depleted mantle Hf model ages of 2.43-2.70 Ga, with major peaks at ∼2.54 and ∼2.65 Ga. The geochemical and Nd-Hf isotopic characteristics indicate that the Mohe quartz-dioritic rocks might be formed by partial melting of high-pressure metamorphosed juvenile crustal rocks in post-orogenic extensional regime in the Early Paleoproterozoic. It suggests that important crustal growth occurred in the Quanji massif and the Tarim Craton at ∼2.4 and 2.5-2.7 Ga. The Quanji massif and Tarim Craton might share a similar crustal evolution history with the North China Craton in the Neoarchean.

AB - The metamorphosed Early Paleoproterozoic granitoids in the Quanji massif, Northwestern China provide constraints for relationship between the Tarim Craton and North China Craton. Among granitoids batholiths, rocks of the Mohe quartz-diorite show typically adakitic geochemical characteristics, with medium K2O/Na2O ratios (0.56-1.17) and high Sr (519-619 ppm) low Y (9.37-20.40 ppm) and Yb (0.97-1.77 ppm) concentrations. The rocks have e{open} Nd(t) values between +2.4 and +4.4 and depleted mantle Nd model ages of 2.43-2.59 Ga. The magmatic zircons have positive e{open} Hf(t) values ranging from +0.40 to +7.60 and depleted mantle Hf model ages of 2.43-2.70 Ga, with major peaks at ∼2.54 and ∼2.65 Ga. The geochemical and Nd-Hf isotopic characteristics indicate that the Mohe quartz-dioritic rocks might be formed by partial melting of high-pressure metamorphosed juvenile crustal rocks in post-orogenic extensional regime in the Early Paleoproterozoic. It suggests that important crustal growth occurred in the Quanji massif and the Tarim Craton at ∼2.4 and 2.5-2.7 Ga. The Quanji massif and Tarim Craton might share a similar crustal evolution history with the North China Craton in the Neoarchean.

KW - crustal growth

KW - high-Sr and low-Y granitoid

KW - North China Craton

KW - Quanji massif

KW - Tarim Craton

KW - zircon Hf isotope

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U2 - 10.1007/s12583-014-0401-2

DO - 10.1007/s12583-014-0401-2

M3 - Journal Article (refereed)

AN - SCOPUS:84899086318

VL - 25

SP - 74

EP - 86

JO - Journal of Earth Science

JF - Journal of Earth Science

SN - 1674-487X

IS - 1

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