Zircon U-Pb age and Hf-O isotope evidence for Paleoproterozoic metamorphic event in South China

Zhang, Shao‐Bing; Zheng, Yong‐Fei; Wu, Yuan–Bao; Zhao, Zi‐Fu; Gao, Shan; Wu, Fu‐Yuan

doi:10.1016/j.precamres.2006.08.009

Cited by 370 publications

(166 citation statements)

References 84 publications

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“…Archean and Paleoproterozoic rocks were only previously known in the northern part of the Yangtze Block. They comprisẽ 2.9 Ga tonalitic-trondhjemitic-granitic gneisses, which underwent granulite facies metamorphism during the period of 2.03 to 1.97 Ga (Zhang et al 2006;Wu et al 2008) and were intruded by A-type granites and mafic dykes at~1.85 Ga (Peng et al 2009;Xiong et al 2009). These Paleoproterozoic metamorphic and magmatic events have been linked to the assembly and breakup of the Columbia supercontinent (Zhang et al 2006;Sun et al 2008;Wu et al 2008).…”

Section: Geological Backgroundmentioning

confidence: 99%

“…In the traditional reconstruction models (Rogers and Santosh 2002;Zhao et al 2002), the Yangtze Block is not included in the Columbia supercontinent, due to the lack of geological and geochronological data for that time. However, recent studies reveal that the Yangtze Block may have been involved in this global Paleoproterozoic orogenic event (Zhang et al 2006;Sun et al 2008;Wu et al 2008;Peng et al 2009;Zhao et al 2010). For example, the 2.05-1.9 Ga magmatism and granulitic metamorphism in the northern Yangtze Block have been interpreted to be a response of the assembly of the Columbia supercontinent (Zhang et al 2006;Sun et al 2008;Wu et al 2008).…”

Section: Possible Link To the Columbia Supercontinentmentioning

confidence: 99%

“…However, recent studies reveal that the Yangtze Block may have been involved in this global Paleoproterozoic orogenic event (Zhang et al 2006;Sun et al 2008;Wu et al 2008;Peng et al 2009;Zhao et al 2010). For example, the 2.05-1.9 Ga magmatism and granulitic metamorphism in the northern Yangtze Block have been interpreted to be a response of the assembly of the Columbia supercontinent (Zhang et al 2006;Sun et al 2008;Wu et al 2008). The 2.05-1.95 Ga detrital zircons of metamorphic origin have been identified in the Dongchuan Group, also implying that the orogenic event may have taken place in the Yangtze Block (Zhao et al 2010).…”

Section: Possible Link To the Columbia Supercontinentmentioning

confidence: 99%

“…Recent studies have shown that the Yangtze Block was likely a component of the Columbia supercontinent (Zhang et al 2006;Sun et al 2008;Zhao et al 2010). The Dongchuan Group has been suggested to have formed in an intracontinental rift basin likely during the initial breakup/fragmentation of the Columbia supercontinent (Zhao et al 2010).…”

Section: Introductionmentioning

confidence: 99%

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Late Paleoproterozoic sedimentary rock-hosted stratiform copper deposits in South China: their possible link to the supercontinent cycle

Zhao

Zhou

et al. 2012

Miner Deposita

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Giant sedimentary rock-hosted stratiform copper (SSC) deposits commonly occur in rift environments, temporally coincident with the breakup of the Rodinia and Pangea supercontinents. However, whether or not such deposits have also formed during the breakup of the Paleoproterozoic Columbia supercontinent is not well known. A group of dolostone-hosted Cu deposits in late Paleoproterozoic rift-related sedimentary sequences of the Dongchuan Group, South China, form one of the largest SSC districts in the world. Being one of the largest SSC deposits in the region, the Yinmin deposit has stratiform Cu orebodies intruded by dolerite dykes. One dyke has a SIMS zircon U-Pb age of 1,701±28 Ma, slightly younger than the orehosting strata with a zircon U-Pb age of 1,742±13 Ma for a tuff unit. Six chalcopyrite and bornite separates from stratiform orebodies contain highly radiogenic Os and extremely low common Os and yield a weighted mean Re-Os model age of 1,666±82 Ma and a 187 Os-187 Re errorchron age of 1,585±100 Ma. The present zircon U-Pb and sulfide Re-Os ages thus constrain the timing of the mineralization at 1,700 Ma. The Yinmin deposit and, by inference, other SSC deposits in the region, arguably represent a large-scale SSC mineralization event during the late Paleoproterozoic. The formation of these deposits was coeval with the initial breakup/fragmentation of the Columbia supercontinent. This study highlights the temporal and likely genetic links between large-sized SSC deposits and the supercontinent cycle.

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Section: Geological Backgroundmentioning

confidence: 99%

Section: Possible Link To the Columbia Supercontinentmentioning

confidence: 99%

Section: Possible Link To the Columbia Supercontinentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Late Paleoproterozoic sedimentary rock-hosted stratiform copper deposits in South China: their possible link to the supercontinent cycle

Zhao

Zhou

et al. 2012

Miner Deposita

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“…Kongling Complex) are rare in the Yangtze block [25][26][27][28]. Even so, recent studies have shown that there are chronological records of 1.8-2.1Ga tectonothermal events in the Yangtze block [29][30][31][32][33][34][35][36][37][38]. Some of these studies indicates that these events may be related to the amalgamation and breakup of the Columbia supercontinent [34][35][36][37][38].…”

mentioning

confidence: 99%

Discovery of Paleoproterozoic rapakivi granite on the northern margin of the Yangtze block and its geological significance

Zhang

Wang

et al. 2011

Chin. Sci. Bull.

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The Huashanguan rapakivi pluton in Zhongxiang, Hubei Province, China, is the first discovered Proterozoic rapakivi pluton in the Yangtze block. Based on field and petrographical observations, a typical rapakivi texture was found in the northern portion of the Huashanguan granitic pluton. Almost all the K-feldspar phenocrysts were round to oval in shape and most had plagioclase coatings known as rapakivi phenocrysts. Alkali feldspars and quartz had two or more generations. Petrochemically, the Huashanguan rapakivi granites were characterized as having high values of Si, K, Fe, Th, U, La, Ga, Ce, Sm and LREE, low values of Ca, Mg, Sr, Nb, Y and HREE, and a negative Eu anomaly. These geochemical characteristics of the Huashanguan granites were concordant with typical rapakivi granites, and had an affinity to A-type granites. LA-ICP-MS U-Pb zircon dating also was conducted. The dating yielded a 207 Pb/ 206 Pb weighted mean age of 1851±18 Ma (MSWD =1.2), which represents the age of the pluton emplacement. The age of 803±170 Ma at the lower intercept in the concordia diagram corresponds to the age of a later deformation event which affected the pluton, and suggests that the Huashanguan pluton was influenced by Neoproterozoic thermo-tectonic events after its formation. The discovery of Paleoproterozoic Huashanguan rapakivi granites indicates continental rifting or a post-orogenic extensional event that took place in the Paleoproterozoic in the Yangtze block. These events may be related to the breakup of the Paleoproterozoic Columbia supercontinent.

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Temporal and spatial patterns of sediment routing across the southeast margin of the Tibetan Plateau: Insights from detrital zircon

et al. 2016

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The Cenozoic deposits of the Tibetan Plateau's southeastern margin are often cited as part of a continental‐scale river system connecting the Paleo‐Yangtze River with the Paleo‐Red River. Confirming the purported connection and any subsequent drainage reorganization has garnered significant attention and varied proposed ages for reorganization. This study presents detrital zircon U‐Pb ages and paleocurrents in Eocene to Pleistocene sedimentary basin deposits distributed over a broad area of the southeast Tibetan Plateau margin within the area of proposed paleoriver connectivity. When combined with previously published studies, our U‐Pb ages allow examination of the temporal and spatial distributions of provenance throughout the Cenozoic. We identify six key age components of the detrital U‐Pb age distributions and use these to examine the patterns of sediment provenance for different Cenozoic epochs. Detailed analysis of these components shows that provenance for both onshore and offshore deposits is best described by local bedrock sources and provides little to no evidence of regional changes in provenance. This suggests that a stable fluvial system similar to the modern drainage network has existed since the Eocene with no evidence for major provenance‐altering river capture. Paleoflow measurements taken throughout the SE margin further corroborate the results of detrital zircon provenance. The combination of U‐Pb age components and paleocurrent directions does not support a Cenozoic connection between the Paleo‐Yangtze and Paleo‐Red Rivers.

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Zircon U-Pb age and Hf-O isotope evidence for Paleoproterozoic metamorphic event in South China

Cited by 370 publications

References 84 publications

Late Paleoproterozoic sedimentary rock-hosted stratiform copper deposits in South China: their possible link to the supercontinent cycle

Late Paleoproterozoic sedimentary rock-hosted stratiform copper deposits in South China: their possible link to the supercontinent cycle

Discovery of Paleoproterozoic rapakivi granite on the northern margin of the Yangtze block and its geological significance

Temporal and spatial patterns of sediment routing across the southeast margin of the Tibetan Plateau: Insights from detrital zircon

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