U–Pb and Hf isotopic study of zircons from migmatised amphibolites in the Cathaysia Block: Implications for the early Paleozoic peak tectonothermal event in Southeastern China

Li, Longming; Sun, Min; Wang, Yuejun; Xing, Guangfu; Zhao, Guochun; Lin, Shoufa; Xia, Xiaoping; Chan, Lungsang; Zhang, Feifei; Wong, J.

doi:10.1016/j.gr.2010.03.009

Cited by 99 publications

(57 citation statements)

References 55 publications

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“…They have experienced middle Paleozoic and early Mesozoic highgrade metamorphism, as evidenced by metamorphic zircon ages for four plagioclase amphibolites and amphibolites (421 ± 13 Ma, 422 ± 13 Ma, 243 ± 3 Ma and 221 ± 4 Ma for 09WG-58D, 09WG-66A, 09WG-74C and YK-9A, respectively). In addition, the reported Precambrian mafic rocks only developed during the Paleoproterozoic (∼1800 Ma) and Neoproterozoic (∼860-790 Ma) period in the Cathaysia Block and show the OIB-like geochemical affinities, reflective of intraplate rifting setting (e.g., Li et al, 1998Li et al, , 2005Li et al, , 2010bShu et al, 2008Shu et al, , 2011Li et al, 2010a). Such characteristics are distinct from our mafic samples.…”

Section: Age Of the Mafic Igneous Rocksmentioning

confidence: 48%

“…Li et al, 2010c;Wang et al, 2012b,c). Recent geochronological data have shown that the Neoproterozoic and even Paleozoic units are additionally presented within the previously mapped basement succession (e.g., Li et al, 1998;Wang et al, 2007cWang et al, , 2010bWang et al, , 2011bWang et al, , 2012cWan et al, 2007Wan et al, , 2010Yu et al, 2009Yu et al, , 2010Li et al, 2010aLi et al, ,c, 2011. Within the Cathaysia basement, there are small amounts of mafic and ultramafic rocks (e.g., amphibolite, metagabbro, metadiabase, metabasite, peridotite and pyroxenite), which occur mainly as lens, pods and fragments (e.g., Fujian BGMR, 1985;Guangxi BGMR, 1985;Guangdong BGMR, 1988;Zhejiang BGMR, 1989;Zhang et al, 2012a).…”

Section: Geological Background and Petrologymentioning

confidence: 85%

“…16). Li et al, 1994;12) Gao et al, 2009;13) 14) Ye et al, 2007;15) Chen et al, 2009a;17) Wang et al, 2012a;18) Zhou et al, 2004Zhou et al, , 200919) Zhang et al, 2009;20) Li et al, 2009;21) Ding et al, 2008;22) Zhang et al, 2012c;23) Wang et al, 2008b;24) Shu et al, 2006;25) Li et al, 2010a;26) Hu and Liu, 2002;27) Qin et al, 2006;28) Zhang et al, 1998;29) Zhang et al, 2012a;30) Shu et al, 2008;31) Liu et al, 2001; 32) Shu et al, 2011;33) Li et al, 2005;34) Li et al, 2002;35) Zhang et al, 2011b and 36) this study. Inset (a) shows the early Neoproterozoic tectonic subdivision in the eastern South China Block and associated orogenism.…”

Section: Neoproterozoic Northwesterly Episodic Amalgamation Along Theunclassified

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Geochronological, geochemical and Nd–Hf–Os isotopic fingerprinting of an early Neoproterozoic arc–back-arc system in South China and its accretionary assembly along the margin of Rodinia

Wang

Zhang

Cawood

et al. 2013

Precambrian Research

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Keywords:Metabasic rocks MORB-and/or arc-like geochemical signatures Earliest Neoproterozoic Arc and back-arc system Eastern South China Block Periphery of Rodinia a b s t r a c t U-Pb geochronology along with elemental and Nd-Hf-Os isotopic data from the earliest Neoproterozoic metabasic rocks within the Cathaysia Block of the South China Block (SCB) constrain the tectonic setting and paleogeography of the block within the Rodinia supercontinent. The metabasic rocks give zircon U-Pb ages of 969-984 Ma, ε Hf (t) values of +1.8 to +15.3 and Hf model ages of 0.92-1.44 Ga. They are subalkaline basalts that can be geochemically classified into four groups. Group 1 has low Nb contents (1.24-4.33 ppm), highly positive ε Nd (t) values (+4.3 to +5.2), and REE and multi-elemental patterns similar to fore-arc MORB-type basalt. Group 2 has Nb contents ranging from 3.13 ppm to 6.48 ppm, ε Nd (t) of +3.1 to +6.2, low Re and Os contents and high initial Os isotopic ratios, and displays an E-MORB geochemical signature. Group 3 has Nb = 7.18-29.87 ppm, Nb/La = 0.60-1.40, Nb/U = 5.0-37, Ce/Pb = 1.1-6.6, ε Nd (t) = +2.9 to +7.0, 187 Re/ 188 Os = 5.87-8.87 and ␥Os (t) = 178-772, geochemically resembling to the Pickle Nb-enriched basalt. Group 4 has strong LREE/HREE and HREE fractionation and high ε Nd (t) values (+2.3 to +5.6), and is characterized by similar element patterns to arc volcanic rocks. Serpentinites coeval to Group 4 show 187 Os/ 188 Os of 0.1143-0.1442 and ␥Os (t) of −7.8 to +0.1. Groups 1 and 2 are interpreted to originate from the N-MORB and E-MORB-like sources with the addition of an arc-like component, genetically linked to fore-and back-arc settings, respectively. Groups 3 and 4 show inputs of newly subduction-derived melt and fluid in the wedge source. These geochronological and geochemical signatures fingerprint the development of an earliest Neoproterozoic (∼970 Ma) arc-back-arc system along the Wuyi-Yunkai domain of the Cathaysia Block. Regional relationships indicate that the Wuyi-Yunkai arc-back-arc system was one of a series of separate convergent margin settings, which included the Shuangxiwu (∼970-880 Ma) and Jiangnan (∼870-820 Ma) systems that developed in the SCB. The formation and closure of these arc-back-arc systems resulted in the northwestwardly episodic amalgamation of various pieces of the Yangtze and Cathaysia to finally form the SCB. These signatures require the SCB to occupy an exterior accretionary orogen along the periphery of Rodinia during 990-820 Ma, rather than to have formed through Mesoproterozoic Sibao orogenesis within the interior of Rodinia.

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Section: Age Of the Mafic Igneous Rocksmentioning

confidence: 48%

Section: Geological Background and Petrologymentioning

confidence: 85%

Section: Neoproterozoic Northwesterly Episodic Amalgamation Along Theunclassified

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Geochronological, geochemical and Nd–Hf–Os isotopic fingerprinting of an early Neoproterozoic arc–back-arc system in South China and its accretionary assembly along the margin of Rodinia

Wang

Zhang

Cawood

et al. 2013

Precambrian Research

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226

121

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“…Wang et al, 1998;Geng et al, 2006;Wu and Zhang, 1986;Zhai et al, 2010;Wu et al, 2008;Xu et al, 2009;Liu et al, 2008;Chen et al, 2008;Xie and Yang, 2000;Lou et al, 2005;Shen et al, 2008;Sun, 2006aSun, , 2006bLi, 1991;Li et al, 2010b;Fu et al, 2004;Cheng et al, 2009;Zhu et al, 2007;Zhang et al, 2010aZhang et al, , 2010bZhang et al, , 2011b. are observed under microscope (e.g., Li et al, 2011). This suggests that the amphibolites might be partially melted and have contributed to the generation of the Kwangsian Group 1 and 2 granites.…”

Section: Partial Melting Of a Basement-dominant Component?mentioning

confidence: 98%

“…7a-b and 8a; e.g., Shen et al, 1998;Yu et al, 2005Yu et al, , 2007Zeng et al, 2008;Wan et al, 2007Wan et al, , 2010Wang et al, 2011). Zircons from the migmatised amphibolites (northern Wuyi Domain) gave the metamorphic age of 423-460 Ma and have negative ε Nd (430 Ma) for whole-rock and ε Hf (430 Ma) values of −8.5 to +3.6 for zircons (e.g., Li et al, 2010bLi et al, , 2011Xiang et al, 2008). Felsic leucosomes occur locally in the amphibolites of the Precambrian basement, and folded quartz veins along hornblende and plagioclase (Healy et al, 2004).…”

Section: Partial Melting Of a Basement-dominant Component?mentioning

confidence: 99%

Geochronological and geochemical constraints on the petrogenesis of Middle Paleozoic (Kwangsian) massive granites in the eastern South China Block

Zhang

Wang

Zhang

et al. 2012

Lithos

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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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U–Pb and Hf isotopic study of zircons from migmatised amphibolites in the Cathaysia Block: Implications for the early Paleozoic peak tectonothermal event in Southeastern China

Cited by 99 publications

References 55 publications

Geochronological, geochemical and Nd–Hf–Os isotopic fingerprinting of an early Neoproterozoic arc–back-arc system in South China and its accretionary assembly along the margin of Rodinia

Geochronological, geochemical and Nd–Hf–Os isotopic fingerprinting of an early Neoproterozoic arc–back-arc system in South China and its accretionary assembly along the margin of Rodinia

Geochronological and geochemical constraints on the petrogenesis of Middle Paleozoic (Kwangsian) massive granites in the eastern South China Block

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

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