850–790 Ma bimodal volcanic and intrusive rocks in northern Zhejiang, South China: A major episode of continental rift magmatism during the breakup of Rodinia

Li, Xian‐Hua; Li, Wu‐Xian; Li, Zheng‐Xiang; Liu, Ying

doi:10.1016/j.lithos.2007.04.007

Cited by 383 publications

(134 citation statements)

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“…The results are presented in Table 4 The mobility of trace elements can be assessed by plotting against Zr or CIA values (Li et al, 2008b(Li et al, , 2010b. In the covariance diagrams (Fig.…”

Section: Sm-nd Isotopesmentioning

confidence: 99%

“…Among the Yingfeng dolerites/basalts, samples 13MH-13/18/67 are least-evolved, and have the highest MgO contents (9.5-11.5 wt.%) and compatible elements. With these samples, we calculated the compositions of primary magma based on the procedure of Herzberg et al (2007) and Wang et al (1434-1524°C) are obtained, which are higher than that of contemporary ambient MORB-source asthenosphere mantle (1350-1450°C; references in Li et al, 2008b), implying an origin of anomalously hot mantle source. In addition, the North Qaidam mafic rocks are characterized by high Ti/V, mostly >20 for the low-Ti tholeiitic group and >50 for the high-Ti alkaline group, compatible with continental flood tholeiites and ocean-island basalts, respectively ( Fig.…”

Section: Tectonic Settingmentioning

confidence: 99%

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An 850–820Ma LIP dismembered during breakup of the Rodinia supercontinent and destroyed by Early Paleozoic continental subduction in the northern Tibetan Plateau, NW China

Song

Allen

et al. 2016

Precambrian Research

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Section: Sm-nd Isotopesmentioning

confidence: 99%

Section: Tectonic Settingmentioning

confidence: 99%

An 850–820Ma LIP dismembered during breakup of the Rodinia supercontinent and destroyed by Early Paleozoic continental subduction in the northern Tibetan Plateau, NW China

Song

Allen

et al. 2016

Precambrian Research

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“…Western Cathaysia contains a series of structurally disrupted Proterozoic metamorphic domains including the Wuyi, Nanling and Yunkai domains (e.g., Fujian BGMR, 1985;Wang et al, 2012c). The Neoproterozoic boundary between the Cathaysia and Yangtze blocks has traditionally been taken as the Jiangshan-Shaoxing Fault at the eastern Jiangnan Domain (e.g., Shui, 1988;Ye et al, 2007;Zhang and Wang, 2007;Shu et al, 2008;Li et al, 2008bLi et al, , 2009). However, its southward extension is uncertain with some authors postulating the Anhua-Luocheng Fault of the Central and Southern Jiangnan domains (e.g., Jia et al, 2004;Ding et al, 2008) whereas others have suggested the Chenzhou-Linwu Fault, which is used herein as the boundary ( Fig.…”

Section: Geological Background and Petrologymentioning

confidence: 99%

“…Along the Shuangxiwu domain adjacent to the Jiangshan-Shaoxing Fault system (Figs. 1, 2 and 16), plagiogranite and gabbro in the Zhangshudun ophiolitic suite are dated at 970-910 Ma and the ophiolite is interpreted as forming within a back-arc or intraoceanic arc setting (e.g., Li et al, 1994Li et al, , 2002Li et al, , 2008bGao et al, 2009;Chen et al, 2009a,b). Amphibolite-bearing tonalite and granodiorite within the domain show the geochemical signatures of arc volcanic rocks and give the SHRIMP zircon U-P ages of 915 ± 15 Ma and 905 ± 14 Ma, respectively (Ye et al, 2007).…”

Section: Neoproterozoic Northwesterly Episodic Amalgamation Along Thementioning

confidence: 99%

“…The two blocks have been considered to have amalgamated at the end of the Mesoproterozoic to form the Sibao Orogen (inset of Fig. 1) associated with the assembly of Rodinia and to occupy an intracratonic keystone position between Australia and Laurentia (e.g., Li et al, 1995Li et al, , 2002Li et al, , 2008cCharvet et al, 1996;Ye et al, 2007;Boger et al, 2000;Li et al, 2008bLi et al, , 2009). However, an interior location within Rodinia does not fit readily with the presence of early Neoproterozoic (∼970-900 Ma) rock units of arc or back-arc basin affinities in the easternmost Yangtze Block (e.g., Shui, 1988;Li et al, , 2008aLi et al, 2006Li et al, , 2009Ye et al, 2007;Gao et al, 2009;Chen et al, 2009a,b;Shu et al, 2011;Cawood et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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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

220

120

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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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Late Paleozoic to Early Mesozoic provenance record of Paleo‐Pacific subduction beneath South China

Cawood

et al. 2015

Tectonics

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Northeast trending Yong'an Basin, southeast South China Craton, preserves a Permian-Jurassic, marine to continental, siliciclastic-dominated, retroarc foreland basin succession. Modal and detrital zircon data, along with published paleocurrent data, sedimentary facies, and euhedral to subhedral detrital zircon shapes, indicate derivation from multicomponent, nearby sources with input from both the interior of the craton to the northwest and from an inferred arc accretionary complex to the southeast. The detrital zircon U-Pb age spectra range in age from Archean to early Mesozoic, with major age groups at 2000-1700 Ma, 1200-900 Ma, 400-340 Ma, and 300-240 Ma. In addition, Early Jurassic strata include zircon detritus with ages of 200-170 Ma. Regional geological relations suggest that Precambrian and Early Paleozoic detritus was derived from the inland Wuyi Mountain region and Yunkai Massif of the South China Craton. Sources for Middle Paleozoic to early Mesozoic detrital zircons include input from beyond the currently exposed China mainland. Paleogeographic reconstruction in East Asia suggests derivation from an active convergent plate margin along the southeastern rim of the craton that incorporated part of Southwest Japan and is related to the subduction of the Paleo-Pacific Ocean. Integration of the geologic and provenance records of the Yong'an Basin with the time equivalent Yongjiang and Shiwandashan basins that lie to the southwest and south, respectively, provides an integrated record of the subduction of the Paleo-Pacific Ocean along the southeast margin of the South China Craton and termination of subduction of the Paleo-Tethys beneath its southwest margin in Permo-Triassic.

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850–790 Ma bimodal volcanic and intrusive rocks in northern Zhejiang, South China: A major episode of continental rift magmatism during the breakup of Rodinia

Cited by 383 publications

References 68 publications

An 850–820Ma LIP dismembered during breakup of the Rodinia supercontinent and destroyed by Early Paleozoic continental subduction in the northern Tibetan Plateau, NW China

An 850–820Ma LIP dismembered during breakup of the Rodinia supercontinent and destroyed by Early Paleozoic continental subduction in the northern Tibetan Plateau, NW China

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

Late Paleozoic to Early Mesozoic provenance record of Paleo‐Pacific subduction beneath South China

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