Geochronological and geochemical data of paragneiss and amphibolite from the Chencai Group in South China: Implications for petrogenesis and tectonic significance

Lu, Kejia; Li, Longming; Lin, Shoufa; Ren, Shenglian; Liang, Feng; Han, Xu; Ge, Yanpeng; Jiang, Jian; Wang, Lei; Wang, Bo

doi:10.1002/gj.3845

Cited by 6 publications

(7 citation statements)

References 63 publications

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“…The final closure of the Paleo–South China Ocean occurred in the early Paleozoic along the Qinzhou–Hangzhou juncture belt (HQJB) that located at the junction of the Yangtze and Cathaysia blocks (Gilder et al, 1996; Qi et al, 2016; Yang et al, 2012), resulting in the collision between the Yangtze and Cathaysia blocks (Figure 9e). The main evidences are as follows: (1) the significant differences in the early Paleozoic sedimentary and biological assemblages suggest an early Paleozoic ocean between the Cathaysia and Yangtze blocks (Wu et al, 2020); (2) early Paleozoic accretionary complex (Ge et al, 2020; Li et al, 2022; Lu et al, 2020; Yang & Jiang, 2019; Zhao et al, 2019; Zhao et al, 2020), island‐arc magmatism (Liu et al, 2020; Yao et al, 2012; Zhang et al, 2016; Zhao et al, 2019) and SSZ‐type ophiolites (Li et al, 2022; Yang & Jiang, 2019) within the Cathaysia Block indicate that the Cathaysia Block is impossible as a unified block to collide with the Yangtze Block in the Neoproterozoic; and (3) extensive early Paleozoic amphibolite–granulite facies metamorphism and migmatism (Li et al, 2010; Tong et al, 2021; Wan et al, 2007) occurred below the Devonian angular unconformity in the Cathaysia Block (Figure 9e).…”

Section: Discussionmentioning

confidence: 99%

Zircon geochronology of the deformed matrix in the NE Jiangxi ophiolitic mélange belt: Time constraints on the Neoproterozoic evolution of the Paleo–South China Ocean and assembly of the Yangtze and Cathaysia blocks

et al. 2023

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The NE Jiangxi ophiolitic mélange belt is the key area for understanding the evolution of the Paleo‐South China Ocean and the assembly of the Yangtze and Cathaysia blocks. The age of the deformed matrix is closer to the tectonic emplacement time of the ophiolitic mélange than that of the blocks. However, the rock types, ages and structural deformation of the matrix in the NE Jiangxi ophiolitic mélange belt lack comprehensive understanding. Based on the zircon U–Pb geochronology, Hf isotope and trace element analyses of the deformed matrix in the NE Jiangxi ophiolitic mélange belt, we report the ages of meta‐rhyolite and tuffaceous phyllite to be 800–760 Ma, and the maximum depositional age of the clastic matrix is ~760 Ma. The youngest deformed matrix ages of 800–760 Ma constrain the tectonic emplacement age of the NE Jiangxi ophiolitic mélange belt to the late Qingbaikou period after 800–760 Ma and before the deposition of the Xiuning Formation (765–732 Ma). Zircon ages, trace element and Hf isotope compositions indicate that the 800–760 Ma matrix was formed in a back‐arc basin environment with obvious addition of 1000–800 Ma arc materials and recycled Paleoproterozoic crustal materials. The detrital material source areas were the 800–760 Ma arc and earlier accretionary wedge as juvenile crust. The multi‐stage arc magmatism, metamorphism and deformation in the NE Jiangxi ophiolitic mélange belt suggest that multi‐stage subduction of the Paleo‐South China Ocean and Neoproterozoic accretionary orogeny occurred during 1–0.76 Ga at the southeast margin of the Yangtze Block. Combined with the regional geological data, the Neoproterozoic back‐arc basin or the foreland basin around the Yangtze Block closed after ~760 Ma. The collision and amalgamation of the Yangtze and Cathaysia blocks resulted in the final closure of the Paleo‐South China Ocean, which have occurred in the early Paleozoic.

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Section: Discussionmentioning

confidence: 99%

Zircon geochronology of the deformed matrix in the NE Jiangxi ophiolitic mélange belt: Time constraints on the Neoproterozoic evolution of the Paleo–South China Ocean and assembly of the Yangtze and Cathaysia blocks

et al. 2023

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“…Only limited pre-Neoproterozoic basement outcrops have been reported [41]. A large amount of these Precambrian rocks experienced greenschist-amphibolite facies metamorphism, and some late Neoproterozoic to Ordovician sandstone-mudstone slaty sequences underwent lower grade metamorphism [39,40,54,65].…”

Section: Geological Backgroundmentioning

confidence: 99%

“…In this article, we studied several Proterozoic meta-sedimentary rocks from the Chencai, Mayuan, and Mamianshan Groups in the central Zhejiang and northern Fujian Provinces, in the northeastern Cathaysia block. In order to better clarify their depositional ages, which remain controversial [43,53,54]), we conducted detrital zircon laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) U-Pb dating on five representative samples collected from these deformed or metamorphosed sediments. Combined with analysis of directional structures and paleocurrent data measured in the field, we aimed to better understand the early paleogeography of the eastern South China Craton, especially regarding its landscape configuration.…”

Section: Introductionmentioning

confidence: 99%

Did a Late Paleoproterozoic-Early Mesoproterozoic Landmass Exist in the Eastern Cathaysia Block? New Evidence from Detrital Zircon U-Pb Geochronology and Sedimentary Indicators

Huang

Grave

2022

Minerals

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The South China Craton comprises the Yangtze and Cathaysia blocks and is one of the largest Precambrian continental blocks in East Asia. However, the early geological and geographical evolution of the Cathaysia block is relatively poorly understood, due to the sparse exposure of pre-Neoproterozoic rocks and reworking during Phanerozoic polyphase magmatism and metamorphism. In this contribution, we carried out detrital zircon U-Pb geochronology and sedimentary analyses on five Proterozoic meta-sedimentary rocks collected from the northeastern Cathaysia block, which belong to the previously defined Chencai, Mayuan, and Mamianshan Groups (strata). LA-ICP-MS U-Pb dating results of the detrital zircons show various ~1.85–1.35 Ga maximum depositional ages. They are significantly older than the previously constrained Neoproterozoic formation ages of these Proterozoic strata of northeastern Cathaysia, suggesting that their deposition and formation were probably initiated as early as the late Paleoproterozoic. Provenance analyses reveal that the late Paleoproterozoic to early Mesoproterozoic detrital zircons with igneous-origin were derived from in situ contemporary crystalline basements in eastern Cathaysia. In addition, by implication, the easternmost part of Cathaysia was probably an emerged area (i.e., the “proto-Cathaysia Land”) under active erosion. It had a ~NWW orientation and provided detrital sediments to the neighboring marine basin (i.e., the Cathaysia Sea) during the late Paleoproterozoic to early Mesoproterozoic. Finally, the Paleoproterozoic evolution of Cathaysia was involved in the assembly of the Nuna supercontinent. Our results, together with the published data, reveal a distinct late Paleoproterozoic (~1.8 Ga) detrital zircon age peak, which seems to support the view that eastern Cathaysia had close tectonic affinities with terranes such as the Precambrian terranes of current northern India, in the framework of the Nuna supercontinent reconstruction.

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“…6). In these areas, garnet-bearing amphibolites frequently occur with ma c rocks [74][75][76] . Recently, retrograded eclogite and ma c granulite from the Badu Complex was documented 74 , whose metamorphic age is 234 Ma (Triassic), with 997 Ma (Neoproterozoic) for the protolith age of the ma c granulite, which are comparable to the metamorphic and the protolith ages of the eclogites in the Wolhyeonri Complex.…”

Section: Tectonic a Nity Of The Southwestern Korean Peninsulamentioning

confidence: 99%

“…The Precambrian rocks and their subsequent alteration within the Cathaysia Block are well represented in the Badu Complex and the Chencai Complex 74,75 , located in the northeastern Cathaysia Block (Fig. 6).…”

Section: Tectonic a Nity Of The Southwestern Korean Peninsulamentioning

confidence: 99%

A New Titanopteran from Southwestern Korean Peninsula: The Triassic Age of the Nampo Group and its Tectonic Implications

Park

Kim

Nam

et al. 2021

Preprint

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Titanopterans are well-known as giant predatory insects in the Triassic, but not only their rare occurrences have been limited to Central Asia and Australia, but also their phylogenetic affinity remains unresolved. The age of the nonmarine sequences of the Nampo Group at the southwestern Korean Peninsula is unclear, and the tectonic affinity of the surrounding area is contentions. Here we report a new titanopteran Magnatitan jongheoni gen. et sp. nov. the Amisan Formation, Nampo Group, which marks the first discovery of the titanopteran fossil from outside Central Asia and Australia, presenting a possible circum-Tethys Ocean distribution, at least, during the Late Triassic. The new fossil shows a clearly divided CuPb, which will help understand the evolution of titanopterans in the future. Moreover, the occurrence of a titanopteran finally confirms the Late Triassic age of the Nampo Group. In China, similar Late Triassic non-marine sequences are widespread in the Cathaysia Block, in which various geological features similar to those in the southwestern Korean Peninsula, such as a Paleozoic magmatism and an eclogite facies with Neoproterozoic protoliths, have been recently documented as in the southeastern Korean Peninsula. Such similarities may suggest a close tectonic affinity between the northeastern Cathaysia Block and the southwestern Korean Peninsula.

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Geochronological and geochemical data of paragneiss and amphibolite from the Chencai Group in South China: Implications for petrogenesis and tectonic significance

Cited by 6 publications

References 63 publications

Zircon geochronology of the deformed matrix in the NE Jiangxi ophiolitic mélange belt: Time constraints on the Neoproterozoic evolution of the Paleo–South China Ocean and assembly of the Yangtze and Cathaysia blocks

Zircon geochronology of the deformed matrix in the NE Jiangxi ophiolitic mélange belt: Time constraints on the Neoproterozoic evolution of the Paleo–South China Ocean and assembly of the Yangtze and Cathaysia blocks

Did a Late Paleoproterozoic-Early Mesoproterozoic Landmass Exist in the Eastern Cathaysia Block? New Evidence from Detrital Zircon U-Pb Geochronology and Sedimentary Indicators

A New Titanopteran from Southwestern Korean Peninsula: The Triassic Age of the Nampo Group and its Tectonic Implications

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