U–Pb zircon ages and Hf isotopic compositions of metasedimentary rocks from the Grove Subglacial Highlands, East Antarctica: Constraints on the provenance of protoliths and timing of sedimentation and metamorphism

Wang, Wei; Liu, Xiaochun; Zhao, Yue; Zheng, Guanggao; Chen, Longyao

doi:10.1016/j.precamres.2015.12.018

Cited by 32 publications

(7 citation statements)

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“…Few inherited zircon data in the Prydz orogen are younger than c . 900 Ma (Grew et al., ; Hokada, Harley, Dunkley, Kelly, & Yokoyama, ; Kinny, Black, & Sheraton, ; Wang, Liu, Zhao, Zheng, & Chen, ), inhibiting reliable tectonic inferences based on the geochronological data for the period c . 900–550 Ma.…”

Section: Discussionmentioning

confidence: 99%

Neoproterozoic evolution and Cambrian reworking of ultrahigh temperature granulites in the Eastern Ghats Province, India

Mitchell

Johnson

Clark

et al. 2018

Journal Metamorphic Geology

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The time‐scales and P–T conditions recorded by granulite facies metamorphic rocks permit inferences about the geodynamic regime in which they formed. Two compositionally heterogeneous cordierite–spinel‐bearing granulites from Vizianagaram, Eastern Ghats Province (EGP), India, were investigated to provide P–T–time constraints using petrography, phase equilibrium modelling, U–Pb geochronology, the rare earth element composition of zircon and monazite, and Ti‐in‐zircon thermometry. These ultrahigh temperature (UHT) granulites preserve discrete compositional layering in which different inferred peak assemblages are developed, including layers bearing garnet–sillimanite–spinel, and others bearing orthopyroxene–sillimanite–spinel. These mineral associations cannot be reproduced by phase equilibrium modelling of whole‐rock compositions, indicating that the samples became domainal on a scale less than that of a thin section, even at UHT conditions. Calculation of the P–T stability fields for six compositional domains within which the main rock‐forming minerals are considered to have attained equilibrium suggests peak metamorphic conditions of ~6.8–8.3 kbar at ~1,000°C. In most of these domains, the subsequent evolution resulted in the growth of cordierite and final crystallization of melt at an elevated (residual) H2O‐undersaturated solidus, consistent with <1 kbar of decompression. Concordant U–Pb ages obtained by SHRIMP from zircon (spread 1,050–800 Ma) and monazite (spread 950–800 Ma) demonstrate that crystallization of these minerals occurred during an interval of c. 250 Ma. By combining LA‐ICP‐MS U–Pb zircon ages with Ti‐in‐zircon temperatures from the same analysis sites, we show that the crust may have remained above 900°C for a minimum of c. 120 Ma between c. 1,000 and c. 880 Ma. Overall, the results suggest that, in the interval 1,050 to 800 Ma, the evolution of the Vizianagaram granulites culminated with UHT conditions from c. 1,000 Ma to c. 880 Ma, associated with minor decompression, before further zircon crystallization at c. 880–800 Ma during cooling to the solidus. However, these rocks are adjacent to the Paderu–Anantagiri–Salur crustal block to the NW that experienced counterclockwise P–T–t paths, and records similar UHT peak metamorphic conditions (7–8 kbar, ~950°C) followed by near‐isobaric cooling, and has a similar chronology during the Neoproterozoic. The limited decompression inferred at Vizianagaram may be explained by partial exhumation due to thrusting of this crustal block over the adjacent Paderu–Anantagiri–Salur crustal block. The residual granulites in both blocks have high concentrations of heat‐producing elements and likely remained hot at mid‐crustal depths throughout a period of relative tectonic quiescence in the interval 800–550 Ma. During the Cambrian Period, the EGP was located in the hinterland of the Denman–Pinjarra–Prydz orogen. A later concordant population of zircon dated at 511 ± 6 Ma records crystallization at temperatures of ~810°C. This age may record a low‐degree of...

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Section: Discussionmentioning

confidence: 99%

Neoproterozoic evolution and Cambrian reworking of ultrahigh temperature granulites in the Eastern Ghats Province, India

Mitchell

Johnson

Clark

et al. 2018

Journal Metamorphic Geology

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“…In addition, based on the judgment of discordance showed by the many previous studies (for example, see Refs. [22][23][24]), the U-Pb zircon ages with discordances of >10% were rejected in data interpretation in this paper. Age calculations were performed using Isoplot/Ex 4.15 [25].…”

Section: Introductionmentioning

confidence: 89%

Effectiveness for Determination of Depositional Age by Detrital Zircon U–Pb Age in the Cretaceous Shimanto Accretionary Complex of Japan

Tokiwa¹,

Takeuchi²,

Shimura³

et al. 2017

Evolutionary Models of Convergent Margins - Origin of Their Diversity

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Detrital zircon U-Pb ages indicate the crystallization age. Therefore, it is necessary to evaluate the effectiveness of determining the age of deposition using zircon age data. We carried out U-Pb dating of detrital zircons from sandstone at eight sites in the Cretaceous Shimanto accretionary complex on Kii Peninsula, Japan, with the aim of evaluating the accuracy of U-Pb zircon ages as indicators of the depositional age of sedimentary rocks by comparing zircon ages with radiolarian ages. Our results reveal zircons of late Cretaceous age, and the youngest peak ages are in good agreement with depositional ages inferred from radiolarian fossils. In addition, the youngest peak ages become younger as tectono-structurally downwards, and this tendency is clearer for the zircon ages than for the radiolarian ages. These results indicate that newly crystalized zircons were continuously supplied to the sediment by constant igneous activity during the late Cretaceous and that zircon ages provide remarkably useful information for determining the age of deposition in the Cretaceous Shimanto accretionary complex.

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“…Comparison of detrital zircon ages of metasedimentary rocks with similar depositional age in the Chinese CTB and Yili Block (this study; Huang et al, ), Tarim Craton (He, Zhu, & Ge, ; He, Zhu, Ge, Zheng, & Wu, ), North China Craton (Luo et al, ; Wan et al, ; Xia, Sun, Zhao & Luo, ; Xia, Sun, Zhao, Wu, et al, ), Siberian Craton (Glorie et al, ; Khudoley et al, ; Powerman et al, ), Amazonian Craton (Babinski et al, 2013; Geraldes et al, ), Yangtze Block (Wang et al, ; Yang et al, ), Cathaysia Block (Yao et al, ; Yu et al, , ), African (Anderson et al, ; Babinski, et al, ; Foster et al, ; Konopásek et al, ; Linol et al, ), Antarctican (Grew et al, ; Marschall et al, ; Takamura et al, ; Wang et al, ), and Indian blocks (Collins et al, ; Dharmapriya et al, ; Li et al, ; Plavsa et al, 2012).…”

Section: Discussionmentioning

confidence: 61%

“…2.4–2.5 and 3.5 Ga with only inconspicuous peak at 1.4–1.6 Ga (Figure f; Wang et al, ; Yang et al, ). For the same reasons, the African (Figure h; Anderson et al, ; Babinski et al, ; Foster et al, ; Konopásek et al, ; Linol et al, ), Antarctican (Figure l; Grew et al, ; Marschall et al, ; Takamura et al, ; Wang et al, ), Indian (Figure j; Collins et al, ; Dharmapriya et al, ; Li et al, ; Plavsa et al, ), and Australian blocks (Figures b–d; Smits et al, , and references therein) are also excluded for the CTB's origin. For the Cathaysia Block, it has an age peak at 1.21 Ga (Figure g; Yao et al, ; Yu et al, , ), which is not present in the CTB.…”

Section: Discussionmentioning

confidence: 94%

From Breakup of Nuna to Assembly of Rodinia: A Link Between the Chinese Central Tianshan Block and Fennoscandia

et al. 2019

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The transition from breakup of Nuna (or Columbia, 2.0-1.6 Ga) to assembly of Rodinia (1.0-0.9 Ga) is investigated by means of U-Pb and Lu-Hf data of detrital zircons from three Neoproterozoic metasedimentary rocks in the Central Tianshan Block (CTB), NW China. These data yield six age peaks around 1.0, 1.13, 1.34, 1.4-1.6, 1.75, and 2.6 Ga. Few zircons are detected between 2.0 and 2.5 Ga. The Paleoproterozoic to Neoproterozoic detrital zircons have Hf isotopic compositions (−22.1 to +13.0) similar to those of coeval magmatic rocks in the CTB, indicating a proximal provenance. These results, together with the geological evidence and the presence of 1.4 Ga orogenic granitoids in the CTB, rule out most cratons as the CTB sources but support a Fennoscandia ancestry. Zircon U-Pb ages and Hf isotopic compositions from the CTB and Fennoscandia suggest that from 1.8 to 1.4 Ga, the ε Hf (t) values increased toward more positive values, consistent with an exterior orogen characteristic that the lower crust was replaced by a juvenile arc crust. In contrast, from 1.4 to 0.9 Ga, zircon ε Hf (t) values decreased to more negative values, reflecting an interior orogen, characterized by enhanced contribution of recycled crustal material from collided continental fragments. This marked shift most likely reflected a transition from breakup of Nuna to assembly of Rodinia, accomplished by a transformation from an exterior orogen to an interior one.

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U–Pb zircon ages and Hf isotopic compositions of metasedimentary rocks from the Grove Subglacial Highlands, East Antarctica: Constraints on the provenance of protoliths and timing of sedimentation and metamorphism

Cited by 32 publications

References 74 publications

Neoproterozoic evolution and Cambrian reworking of ultrahigh temperature granulites in the Eastern Ghats Province, India

Neoproterozoic evolution and Cambrian reworking of ultrahigh temperature granulites in the Eastern Ghats Province, India

Effectiveness for Determination of Depositional Age by Detrital Zircon U–Pb Age in the Cretaceous Shimanto Accretionary Complex of Japan

From Breakup of Nuna to Assembly of Rodinia: A Link Between the Chinese Central Tianshan Block and Fennoscandia

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