Detrital zircon geochronology of pre-Cretaceous strata: tectonic implications for the Jiangnan Orogen, South China

Su, Jinbao; Dong, Shuwen; Zhang, Yueqiao; Li, Yong; Chen, Xuanhua; Cui, Jianjun

doi:10.1017/s0016756813001003

Cited by 32 publications

(15 citation statements)

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“…The North and South China blocks have different age composition of their basement crusts (e.g. Lei & Shu, ; Li et al, ; Su et al, ; Zhao et al, ; Zhu, Zhu, Ge, & Wang, ), and the main difference between the two blocks is observed in the Neoproterozoic interval; i.e. abundant in South China, whereas absent in North China.…”

Section: Precambrian Zirconsmentioning

confidence: 99%

“…The latest zircon data indicate that the North China craton potentially contains even a Hadean crust in its northeastern part (Z. Li, Chen, & Wei, ); however, no Neoproterozoic granitoids occur. In contrast, the South China block is characterized by dominantly Proterozoic crust, with minor components of Archean crust (Lei & Shu, ; H. L. Li et al, ; Su et al, ; Zhao et al, ). In particular, the northwestern half (Yangtze sub‐block) is occupied dominantly by Neoproterozoic crust that is younger than 1.0 Ga, in apparent coincidence with the so‐called Pan‐African orogenic episodes to have formed Gondwana (e.g.…”

Section: Precambrian Zirconsmentioning

confidence: 99%

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A visage of early Paleozoic Japan: Geotectonic and paleobiogeographical significance of Greater South China

Isozaki

2019

Island Arc

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The current state of knowledge on the early Paleozoic evolution of Japan is reviewed. Although early Paleozoic Japan marked the foundation of long‐lasting subduction‐related orogenic growth throughout the Phanerozoic, details of this have not been fully revealed. Nevertheless, U‐Pb dating of zircons both in Paleozoic granitoids and sandstones is revealing several new aspects of early Paleozoic Japan. The timing of the major tectonic change, from a passive continental margin setting (Stage I) to an active one (Stage II), was constrained to the Cambrian by identifying the oldest arc granitoid, high‐P/T blueschist, and terrigenous clastics of arc‐related basins. Ages of recycled zircons in granitoids and sandstones provided critical information on the homeland of Japan, i.e. the continental margin along which proto‐Japan began to grow. The early Paleozoic continental margin that hosted the development of an arc‐trench system in proto‐Japan had cratonic basement composed mostly of Proterozoic crust with a minor Archean component. The predominant occurrence of Neoproterozoic zircons in Paleozoic rocks, as xenocrysts in arc granitoids and also as detrital grains in terrigenous clastics, indicates that the relevant continental block was a part of South China, probably forming a northeastern segment of Greater South China (GSC) together with the Khanka/Jiamsi/Bureya mega‐block in Far East Asia. GSC was probably twice as large as the present conterminous South China on mainland Asia. Paleozoic Japan formed a segment of a mature arc‐trench system along the Pacific side of GSC, where the N–S‐trending Pacific‐rim orogenic belt (Nipponides) developed with an almost perpendicular relationship with the E–W‐trending Central Asian orogenic belt. The faunal characteristics of the Permian marine fauna in Japan, both with the Tethyan and Boreal elements, can be better explained than before in good accordance with the relative position of GSC with respect to the North China block during the late Paleozoic.

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Section: Precambrian Zirconsmentioning

confidence: 99%

Section: Precambrian Zirconsmentioning

confidence: 99%

A visage of early Paleozoic Japan: Geotectonic and paleobiogeographical significance of Greater South China

Isozaki

2019

Island Arc

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“…The Jishou diabase is 134 ± 2.3 Ma old, which is consistent with the Yanshanian age reported by BGMRH (). Meanwhile, no Cretaceous detrital zircon ages are detected in its surrounding strata, and therefore it cannot be captured from country rocks (Su, Dong, Zhang, Li, Chen, & Cui, ). The Jishou diabase is located on an uplifted orogen of the XTZ.…”

Section: Discussionmentioning

confidence: 99%

“…The SCB comprises two major continental blocks: the Yangtze Block in the northwest and the Cathaysia Block in the southeast, separated by the Jiangnan Orogen, whose western part is also named the XTZ (Figure ; Dong et al, ; Su, Dong, Zhang, Li, Chen, & Cui, ; Su, Dong, Zhang, Li, Chen, Li, et al, ; Su, Dong, Zhang, Li, Chen, Ma, et al, ). The SCB experienced successive subduction/collision events during the Mesozoic.…”

Section: Geological Settingmentioning

confidence: 99%

“…The NE‐trending XTZ comprises the Neoproterozoic Banxi Group, Paleozoic shallow marine deposits, and Mesozoic terrestrial sequences and includes three main unconformities underlying the upper Paleozoic rocks, upper Triassic‐lower Jurassic strata, and Middle Jurassic strata, respectively (Su, Dong, Zhang, Li, Chen, & Cui, ; Su, Dong, Zhang, Li, Chen, Cui, et al, ; Wang, Zhang, et al, ). The XTZ is characterized by fold‐thrust structures in which the NE‐trending Jinxian‐Xupu thrust fault defines the surface exposed boundary between the Yangtze and Cathaysia blocks (Su, Dong, Zhang, Li, Chen, Cui, et al, ).…”

Section: Geological Settingmentioning

confidence: 99%

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Geochronology, geochemistry, and tectonic implications of Jishou Cretaceous diabase, western Xuefengshan tectonic zone in South China

Dong

Zhang

et al. 2017

Geological Journal

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From the east of the Xuefengshan tectonic zone (XTZ) to the Pacific coast of the South China Block, there exist widespread Mesozoic magmatic rocks, which attract a great deal of attention for their forming mechanism and evolutional history. Among them, the Mesozoic Jishou diabase located at the west of the XTZ is reported in this study. Based on our geochronologic analysis, the diabase has a U–Pb age of 134 ± 2.3 Ma. The diabase belongs to calc‐alkaline series in a SiO2‐K2O diagram and illustrates significant enrichment in light rare earth elements and flat heavy rare earth elements without obvious Eu anomalies. Meanwhile, the diabase has negative εHf(t) and εNd(t) values and higher radiogenic 87Sr/86Sr(t) ratios, suggestive of EM2‐like Sr‐Nd isotopic compositions. The diabase shows high variations in 207Pb/204Pb(t; 15.609–15.671), 206Pb/204Pb(t; 17.943–18.742), and 208Pb/204Pb(t; 38.268–39.302). It is suggested that the Jishou diabase may be generated from the lithospheric mantle in response to the decompression melting accompanied by lithospheric extension during Pacific subduction process. During the Early Cretaceous (145–120 Ma), the upwelling and melting of the mantle occurred under the XTZ, causing intraplate Jishou diabase magma. Subsequently, the significantly descending of the subducted Paleo‐Pacific slab led progressively eastward generation and migration of subduction‐related magmas, resulting in a widespread distribution of igneous rocks in the Cathaysia Block.

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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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Detrital zircon geochronology of pre-Cretaceous strata: tectonic implications for the Jiangnan Orogen, South China

Abstract: Fifteen sandstone samples taken from pre-Cretaceous strata of the Yangtze Block are analysed to constrain the evolution of the South China Block, especially the assembly between the Yangtze and Cathaysia blocks. The results show that the maximum depositional

Cited by 32 publications

References 134 publications

A visage of early Paleozoic Japan: Geotectonic and paleobiogeographical significance of Greater South China

A visage of early Paleozoic Japan: Geotectonic and paleobiogeographical significance of Greater South China

Geochronology, geochemistry, and tectonic implications of Jishou Cretaceous diabase, western Xuefengshan tectonic zone in South China

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

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