2018
DOI: 10.1111/jmg.12300
|View full text |Cite
|
Sign up to set email alerts
|

Metamorphic evolution of a newly identified Mesoproterozoic oceanic slice in the Yuka terrane and its implications for a multi‐cyclic orogenic history of the North QaidamUHPMbelt

Abstract: The North Qaidam Orogenic Belt (NQOB), lying at the northern margin of the Tibet Plateau, records two orogenic cycles: A Proterozoic cycle related to the amalgamation and breakup of the supercontinent Rodinia, and an Early Palaeozoic cycle including oceanic subduction and continental deep subduction. At present, the only information about the Proterozoic cycle is the concurrent c. 1,000-900 Ma magmatic and metamorphic events, which limited the understanding of the Proterozoic evolution of NQOB and the relation… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
2
1

Citation Types

1
22
0

Year Published

2018
2018
2023
2023

Publication Types

Select...
5

Relationship

0
5

Authors

Journals

citations
Cited by 31 publications
(23 citation statements)
references
References 130 publications
(248 reference statements)
1
22
0
Order By: Relevance
“…The metamorphic zircon cores show relatively flat HREE patterns and weakly negative Eu anomalies, indicating the presence of garnet and absence of feldspar during zircon core growth, similar to the eclogite‐facies mineral assemblages. The metamorphic cores yield 206 Pb/ 238 U dates of 433 ± 5 to 436 ± 7 Ma with a weighted mean of 435 ± 5 Ma (MSWD = 0.054, Figure c), which is consistent with the peak UHP metamorphic ages of eclogite and impure marble (Chen et al, ; Chen, Zheng, Xu, et al, ; Ren et al, , ; Song et al, ). This age also overlaps with the UHP metamorphic age of 430–440 Ma in the coesite stability field for North Qaidam Orogen (Chen et al, ; Mattinson et al, , , ; Song et al, ; Song et al, ; Song, Zhang, Niu, et al, ; Xiong et al, ; Zhang et al, , , ; Zhang, Ellis, et al, ; Zhang, Mattinson, et al, ; Zhang, Song, et al, ; Zhang, Zhang, et al, ).…”
Section: Discussionsupporting
confidence: 77%
See 4 more Smart Citations
“…The metamorphic zircon cores show relatively flat HREE patterns and weakly negative Eu anomalies, indicating the presence of garnet and absence of feldspar during zircon core growth, similar to the eclogite‐facies mineral assemblages. The metamorphic cores yield 206 Pb/ 238 U dates of 433 ± 5 to 436 ± 7 Ma with a weighted mean of 435 ± 5 Ma (MSWD = 0.054, Figure c), which is consistent with the peak UHP metamorphic ages of eclogite and impure marble (Chen et al, ; Chen, Zheng, Xu, et al, ; Ren et al, , ; Song et al, ). This age also overlaps with the UHP metamorphic age of 430–440 Ma in the coesite stability field for North Qaidam Orogen (Chen et al, ; Mattinson et al, , , ; Song et al, ; Song et al, ; Song, Zhang, Niu, et al, ; Xiong et al, ; Zhang et al, , , ; Zhang, Ellis, et al, ; Zhang, Mattinson, et al, ; Zhang, Song, et al, ; Zhang, Zhang, et al, ).…”
Section: Discussionsupporting
confidence: 77%
“…Four kinds of eclogite have been reported: phengite, bimineralic, lawsonite (pseudomorph)‐bearing, and kyanite‐bearing (Chen et al, , ; Chen et al, ; Ren et al, , ; Zhang, Ellis, et al, ). Pressure–temperature (P‐T) studies on eclogite from the Yukahe gneiss group using conventional thermobarometers show that it experienced a clockwise P‐T evolution with at least four distinguishable metamorphic stages: (1) a pre‐peak metamorphic stage at 450–560°C, 0.6–1.0 GPa; (2) a peak‐pressure UHP stage at 620–680°C, 3.0–3.4 GPa, which is confirmed by a coesite inclusion in garnet in coarse‐grained eclogite; (3) a peak‐temperature stage at 670–720°C, 1.8–2.5 GPa; and (4) a retrograde stage at 550–600°C, 0.6–1.1 GPa (Chen et al, ; Ren et al, , ; Zhang, Ellis, et al, ). Zircon dating shows that the Yukahe eclogite recorded eclogite‐facies metamorphic ages of 434–430 Ma.…”
Section: Geological Backgroundmentioning
confidence: 99%
See 3 more Smart Citations