Cheng, Hao et al. (2010) The Triassic age for oceanic eclogites in the Dabie orogen: Entrainment of oceanic fragments in the continental subduction, Lithos, 117, 82-98, doi: 10.1016/j.lithos.2010.02.007. < 20150916143706-658497 > pub

Map on Earth or stone. Places and analyses are shown.

  • abstract:

    Low-temperature and high-pressure eclogites with an oceanic affinity in the western part of the Dabie orogen have been investigated with combined Lu–Hf and U–Pb geochronology. These eclogites formed over a range of temperatures (482–565 °C and 1.9–2.2 GPa). Three eclogites, which were sampled from the Gaoqiao country, yielded Lu–Hf ages of 240.7 ± 1.2 Ma, 243.3 ± 4.1 Ma and 238.3 ± 1.2 Ma, with a corresponding lower-intercept U–Pb zircon age of 232 ± 26 Ma. Despite the well-preserved prograde major- and trace-element zoning in garnets, these Lu–Hf ages mostly reflect the high-pressure eclogite-facies metamorphism instead of representing the early phase of garnet growth due to the occurrence of omphacite inclusions from core to rim and the shell effect. An upper-intercept zircon U–Pb age of 765 ± 24 Ma is defined for the Gaoqiao eclogite, which is consistent with the weighted-mean age of 768 ± 21 Ma for the country gneiss. However, the gneiss has not been subjected to successive high-pressure metamorphism. The new Triassic ages are likely an estimate of the involvement of oceanic fragments in the continental subduction.

  • doi: 10.1016/j.lithos.2010.02.007
  • modified at 16 h ago


(a) XRF on ThermoARL XRF (at Washington State University)
(b) ICPMS on Agilent 4500 Q-pole ICP-MS (at Washington State University)


(a) IRMS with LF on 25W MIR-10 CO2 laser (at the University of Science and Technology of China in Hefei)
Tixhr 55723904 thumb GQ-12 < 20141126091858-363591 >pub
  • IGSN: IEDRM00QX
  • classification: metamorphic
  • physical-form: hand specimen
  • quantity (kg): 0.27
  • description: Coarse-grained and weakly-foliated eclogite
  • modified at 2020-04-08
Tixhr 1880201296 thumb GQ04 < 20141126091912-370582 >pub
  • IGSN: IEDRM00QY
  • classification: metamorphic
  • physical-form: hand specimen
  • quantity (kg): 0.185
  • description: Coarse-grained and strongly-foliated banded eclogite
  • modified at 2020-04-08
Tixhr 490572878 thumb GQ-08 < 20141125085941-039839 >pub
  • IGSN: IEDRM00QZ
  • classification: metamorphic
  • physical-form: hand specimen
  • quantity (kg): 0.51
  • modified at 2019-08-30
Tixhr1459782046 thumb GQ-09 < 20141126092044-274400 >pub
  • IGSN: IEDRM00R0
  • classification: metamorphic
  • physical-form: hand specimen
  • quantity (kg): 0.345
  • description: Mica-schist
  • modified at 2019-08-30
Tixhr2133287999 thumb GQ13 < 20151022092032-150766 >pub
  • IGSN: IEDRM00R1
  • classification: metamorphic
  • physical-form: hand specimen
  • quantity (kg): 0.505
  • description: Non-foliated eclogite
  • modified at 2020-04-08
name box-type global-id
binder of The Triassic age for oceanic eclogites in the Dabie orogen: Entrainment of oceanic fragments in the continental subduction pub container 20160212142435-023808
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GQ12 pub Agilent 4500 Q-pole ICP-MS (at Washington State University) 31 20190826140443-007141
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GQ04 pub ThermoARL XRF (at Washington State University) 13 20190826113006-934143
GQ13 pub ThermoARL XRF (at Washington State University) 13 20190826141628-380562
GQ13 pub Agilent 4500 Q-pole ICP-MS (at Washington State University) 29 20190826141640-180017
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GQ04_Garnet#4 pub SIMS Cameca ims-5f 11 20190827103751-155353
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GQ04_Garnet5 pub MC-ICP-MS Finnigan, Neptune 4 20190828093345-718968
GQ12_Quartz pub 25W MIR-10 CO2 laser (at the University of Science and Technology of China in Hefei) 1 20190826153527-520112
GQ12_Garnet pub 25W MIR-10 CO2 laser (at the University of Science and Technology of China in Hefei) 1 20190826153614-636031
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GQ12 pub 25W MIR-10 CO2 laser (at the University of Science and Technology of China in Hefei) 1 20190826153413-515901
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GQ12_Garnet_Rim-Core#2 pub EPMA JEOL JXA-8800R 15 20190827120831-059903
GQ12_Garnet_Rim-Core-Rim1_average pub EPMA JEOL JXA-8800R 15 20190827120834-427052
GQ12_Garnet_Core-Rim#1 pub EPMA JEOL JXA-8800R 15 20190827120832-540657
GQ12_Garnet_Core-Rim#4 pub EPMA JEOL JXA-8800R 15 20190827120833-913395
GQ12_Garnet_Rim-Core#3 pub EPMA JEOL JXA-8800R 15 20190827120831-356881
GQ12_Garnet_Rim pub EPMA JEOL JXA-8800R 15 20190827120830-405823
GQ12_Garnet_Core-Rim#2 pub EPMA JEOL JXA-8800R 15 20190827120833-347861
GQ12_Garnet_Rim-Core#4 pub EPMA JEOL JXA-8800R 15 20190827120831-494629
GQ12_Garnet_Rim1 pub EPMA JEOL JXA-8800R 15 20190827120834-360005
GQ12_Garnet_Rim-Core#1 pub EPMA JEOL JXA-8800R 15 20190827120830-629928
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GQ12_Amp#1 pub EPMA JEOL JXA-8800R 19 20190827120900-181918
GQ12_Amp#2 pub EPMA JEOL JXA-8800R 19 20190827120901-586988
GQ12_Ep pub EPMA JEOL JXA-8800R 19 20190827120901-857763
GQ12_Ep#1 pub EPMA JEOL JXA-8800R 19 20190827120901-576422
GQ12_Ep#2 pub EPMA JEOL JXA-8800R 19 20190827120902-287287
GQ12_Phn pub EPMA JEOL JXA-8800R 19 20190827120902-660377
GQ12_Phn#1 pub EPMA JEOL JXA-8800R 19 20190827120903-100242
GQ12_Prg pub EPMA JEOL JXA-8800R 19 20190827120903-547767
GQ12_Garnet3 pub MC-ICP-MS Finnigan, Neptune 4 20190828093345-066203
GQ12_Garnet4 pub MC-ICP-MS Finnigan, Neptune 4 20190828093345-966147
GQ12_Garnet6 pub MC-ICP-MS Finnigan, Neptune 4 20190828093345-603334
GQ12_Garnet7 pub MC-ICP-MS Finnigan, Neptune 4 20190828093345-720202
GQ12_Garnet8 pub MC-ICP-MS Finnigan, Neptune 4 20190828093346-849798
GQ12_whole pub MC-ICP-MS Finnigan, Neptune 4 20190828093345-121506
GQ12_Garnet1 pub MC-ICP-MS Finnigan, Neptune 4 20190828093345-376881
GQ13_Whole pub 25W MIR-10 CO2 laser (at the University of Science and Technology of China in Hefei) 1 20190826154157-302753
GQ13_Garnet pub 25W MIR-10 CO2 laser (at the University of Science and Technology of China in Hefei) 1 20190826154317-377851
GQ13_Quartz pub 25W MIR-10 CO2 laser (at the University of Science and Technology of China in Hefei) 1 20190826154412-368640
GQ13_Garnet#9 pub SIMS Cameca ims-5f 10 20190827103755-187733
GQ13_Garnet#8 pub SIMS Cameca ims-5f 11 20190827103755-746786
GQ13_Garnet#10 pub SIMS Cameca ims-5f 8 20190827103755-145735
GQ13_Garnet#11 pub SIMS Cameca ims-5f 12 20190827103756-799124
GQ13_Garnet_Rim-Core#4 pub EPMA JEOL JXA-8800R 15 20190827120835-409259
GQ13_Garnet_Core_Rim#1 pub EPMA JEOL JXA-8800R 15 20190827120836-575140
GQ13_Garnet_Core_Rim#3 pub EPMA JEOL JXA-8800R 15 20190827120837-901537
GQ13_Garnet_Rim-Core#2 pub EPMA JEOL JXA-8800R 15 20190827120835-265799
GQ13_Garnet_Rim1 pub EPMA JEOL JXA-8800R 15 20190827120837-306223
GQ13_Garnet_Core pub EPMA JEOL JXA-8800R 15 20190827120836-199556
GQ13_Garnet_Rim pub EPMA JEOL JXA-8800R 15 20190827120834-824191
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GQ13_Garnet_Core_Rim#4 pub EPMA JEOL JXA-8800R 15 20190827120837-581640
GQ13_Garnet_Core_Rim#2 pub EPMA JEOL JXA-8800R 15 20190827120836-428360
GQ13_Garnet_Rim-Core_Rim1_average pub EPMA JEOL JXA-8800R 15 20190827120838-366894
GQ13_Garnet_Rim-Core#1 pub EPMA JEOL JXA-8800R 15 20190827120834-387448
GQ13_Omp pub EPMA JEOL JXA-8800R 19 20190827120904-374491
GQ13_Omp#1 pub EPMA JEOL JXA-8800R 19 20190827120904-143905
GQ13_Omp#2 pub EPMA JEOL JXA-8800R 19 20190827120905-729082
GQ13_Amp pub EPMA JEOL JXA-8800R 19 20190827120905-969513
GQ13_Amp#1 pub EPMA JEOL JXA-8800R 19 20190827120906-164161
GQ13_Amp#2 pub EPMA JEOL JXA-8800R 19 20190827120906-966150
GQ13_Prg pub EPMA JEOL JXA-8800R 19 20190827120906-817326
GQ13_Prg#1 pub EPMA JEOL JXA-8800R 19 20190827120907-805923
GQ13_Prg#2 pub EPMA JEOL JXA-8800R 19 20190827120907-571190
GQ13_Phn pub EPMA JEOL JXA-8800R 19 20190827120908-657326
GQ13_Phn#1 pub EPMA JEOL JXA-8800R 19 20190827120908-937969
GQ13_Ep pub EPMA JEOL JXA-8800R 19 20190827120908-172629
GQ13_Whole pub MC-ICP-MS Finnigan, Neptune 4 20190828093346-154281
GQ13_Garnet2 pub MC-ICP-MS Finnigan, Neptune 4 20190828093346-600876
GQ13_Garnet5 pub MC-ICP-MS Finnigan, Neptune 4 20190828093346-254952
GQ08Zr_6 pub SIMS Cameca ims-5f 7 20190827143929-240529
GQ08Zr_14 pub SIMS Cameca ims-5f 7 20190827143931-955007
GQ08Zr_7 pub SIMS Cameca ims-5f 7 20190827143929-008123
GQ08Zr_15 pub SIMS Cameca ims-5f 7 20190827143931-521527
GQ08Zr_8 pub SIMS Cameca ims-5f 7 20190827143930-708460
GQ08Zr_1 pub SIMS Cameca ims-5f 7 20190827143928-422458
GQ08Zr_9 pub SIMS Cameca ims-5f 7 20190827143930-489994
GQ08Zr_2 pub SIMS Cameca ims-5f 7 20190827143929-109817
GQ08Zr_10 pub SIMS Cameca ims-5f 7 20190827143930-911872
GQ08Zr_3 pub SIMS Cameca ims-5f 7 20190827143929-941312
GQ08Zr_11 pub SIMS Cameca ims-5f 7 20190827143930-056973
GQ08Zr_4 pub SIMS Cameca ims-5f 7 20190827143929-559951
GQ08Zr_5 pub SIMS Cameca ims-5f 7 20190827143929-863088
GQ08Zr_12 pub SIMS Cameca ims-5f 7 20190827143930-541927
GQ08Zr_13 pub SIMS Cameca ims-5f 7 20190827143930-361155
name spots global-id
caption ID assembly stone
Table 1. Chemical and isotopic compositions of the Gaoqiao eclogite from the western Dabie pub 20190826115846-905836 major+trace (Hao et al., 2010) 3
Table 2. Oxygen isotope data of whole rocks and minerals for the Gaoqiao eclogite samples pub 20190826153024-050124 oxygen (d18O) 9
Table 6. Lu-Hf isotope data for the Gaoqiao eclogite samples GQ04, GQ12, and GQ13 pub 20190828093629-499151 hafnium (Hao et al., 2010 Table 6) 15
Table 3. SIMS trace elemental concentration profiles for the garnets in Fig. 5 pub 20190827104610-308262 trace garnet (Hao et al., 2010 Table3) 20
Table 4-1. Representative major-element data for garnets pub 20190827110943-922754 major_garnet (Hao et al., 2010 Table 4) 36
Table 4-2. Representative major-element data for omphacites, phengites, amphiboles, epidotes and paragonite pub 20190827121710-489841 major_minerals (Hao et al., 2010 Table 4) 36
Table 5. SIMS U-Pb zircon analyses of the Gaoqiao eclogite samples GQ04 and GQ08 pub 20190827144204-104681 U-series (Hao et al., 2010) 28
manual
  • name
  • Cheng, Hao
  • DuFrane, S. A.
  • Vervoort, J. D.
  • Nakamura, E.
  • Li, Q.
  • Zhou, Zuyi