Detrital zircon U–Pb ages, Hf isotope, and geochemistry of Devonian chert from the Mianlue suture: Implications for tectonic evolution of the Qinling orogen

Yang, Liqiang; Ji, Xingzhong; Santosh, M.; Li, Nan; Zhang, Zhichao; Yu, Jin-Yuan

doi:10.1016/j.jseaes.2015.04.013

Cited by 31 publications

(6 citation statements)

References 70 publications

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“…The Mianlue Ocean is interpreted as a remnant branch of the Palaeo‐Tethys Ocean that formed through continental rifting at the north margin of the SCB in the Silurian (Dong & Santosh, ; Dong, Zhang, Neubauer, et al, ). Based on the radiolarian fossils found in the ophiolite, isotopic ages of various rock types, and regional analyses, the opening and expanding period of the mature oceanic basin is constrained during the Devonian to Carboniferous (Dong & Santosh, ; L. Q. Yang et al, ) and continued until the Middle Permian (G. W. Zhang, Chen, et al, ; G. W. Zhang, Dong, et al, ). This signature suggests that an extensional tectonic setting might have existed within the QOB due to the development of the Mianlue Ocean.…”

Section: Discussionmentioning

confidence: 99%

Detrital zircon U–Pb ages from the Middle to Late Permian strata of the Yiyang area, southern North China Craton: Implications for the Mianlue oceanic crust subduction

et al. 2018

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Basin formation and sedimentary development in the southern North China Craton (NCC) are closely related to the tectonic evolution of the Qinling Orogenic Belt (QOB). With the aim of revealing the coupling evolution between the QOB and southern NCC during the Late Palaeozoic, an investigation based on provenance analysis was performed in this study. We present new detrital zircon U–Pb data from the Middle–Late Permian sediments in the Yiyang area, southern NCC. The results show that detrital zircons, from the Middle Permian Shihezi Formation, have three major peaks at 2,447, 1,905, and 296 Ma. In contrast, the lower and upper parts of the Late Permian Sunjiagou Formation yield major peaks at ~1.85 Ga and ~260 Ma, with weak peaks at ~2.5 Ga, ~450 Ma, and ~315 Ma, and the middle part of the Sunjiagou Formation displays a major peak at 429 Ma. Combined with published palaeocurrent data and lithofacies palaeogeography, the sediments of the Middle Permian Shihezi Formation were sourced from the Inner Mongolia Palaeo‐Uplift along the northern margin of the NCC, whereas the Upper Permian Sunjiagou Formation originated mainly from the southern margin of the NCC including the North Qinling Belt. This provenance shift indicates that the North Qinling Belt and southern margin of the NCC initiated the uplift and exhumation during the Late Permian. On the basis of the evolutionary history of the QOB, we attribute the uplift geodynamics to the Mianlue oceanic crust subduction. This study provides important sedimentological constraints for the tectonic conversion during the Late Palaeozoic along the southern margin of the NCC, which also restricts the start‐up time of the Mianlue oceanic crust subduction from the perspective of the basin–mountain system.

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Section: Discussionmentioning

confidence: 99%

Detrital zircon U–Pb ages from the Middle to Late Permian strata of the Yiyang area, southern North China Craton: Implications for the Mianlue oceanic crust subduction

et al. 2018

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“…The E-W-trending Qinling orogen in central China, which extends for more than 1500 km and is~200-250 km wide, is tectonically situated between the North China and the South China blocks ( Figure 1A) [1,23]. The Lingbao-Lushan-Wuyang fault separates the West Qinling orogen from the Qilian Orogen and North China block to the north.…”

Section: Regional Geologymentioning

confidence: 99%

“…The Lingbao-Lushan-Wuyang fault separates the West Qinling orogen from the Qilian Orogen and North China block to the north. The West Qinling orogen is separated from the Songpan-Ganzi Orogen and the South China block in the south by the Mianlue-Bashan-Xiangguang fault [2,23,24]. The Qinling orogen is further divided into Southern North China block, North Qinling and South Qinling blocks by the Kuanping and Shangdan sutures [1,[25][26][27].…”

Section: Regional Geologymentioning

confidence: 99%

“…The West Qinling orogen is bounded by the Linxia-Wushan-Tianshui fault (Shangdan suture) on the north and the A'nimaque-Mianlue suture on the south ( Figure 1A) [24,29,30]. The West Qinling had a protracted and complex evolution history from the Proterozoic up to the late Mesozoic, with the final collision between the South China block and the South Qinling block along the A'nimaque-Mianlue suture zone [1,3,23,[30][31][32]. The West Qinling orogen is dominantly covered by Paleozoic to early Mesozoic marine sedimentary rocks that were deformed in the early Mesozoic [2,33], and intruded by numerous Mesozoic granitoid intrusions.…”

Section: Regional Geologymentioning

confidence: 99%

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Petrogenesis of Ore-Hosting Diorite in the Zaorendao Gold Deposit at the Tongren-Xiahe-Hezuo Polymetallic District, West Qinling, China

Gou

Qiu

et al. 2019

Minerals

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The newly discovered Zaorendao gold deposit is in the Tongren-Xiahe-Hezuo polymetallic district in the westernmost West Qinling orogenic belt. The estimated pre-mining resource is approximately 13.6 t of Au at an average grade of 3.02 g/t. Mineralization is predominantly controlled by NW-trending and EW-trending faults within diorite intrusions and surrounding sedimentary rocks. In the present study, in situ zircon U–Pb geochronology and Lu–Hf isotopic analyses of the ore-hosting diorite at Zaorendao were measured using LA-ICP-MS. The data suggest that the diorite was emplaced at ca. 246.5 ± 1.9 Ma. The large variation of zircon Hf isotopic composition (ɛHf(t) values ranging from −12.0 to −1.8) indicates a two-stage model age (TDM2) that ranges from 1.4 Ga to 2.0 Ga. Such Lu–Hf isotopic compositions indicate that the diorite was dominantly derived from a Paleo- to Meso-Proterozoic continental crust. The wide range of εHf(t) and the presence of inherited zircon can be interpreted to suggest the mixing of Paleo- to Meso-Proterozoic continental crust with a mantle component. Combining such characteristics with the geochemistry of coeval rocks that are associated with the diorite, we therefore proposed that the gold-hosting Triassic diorite in the Zaorendao gold deposit formed in an active continental margin that was associated with the northward subduction of the paleo-Tethyan ocean.

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“…1B and 2), which are interpreted to have formed as a result of subduction zone and continental collision processes (Sun et al, 2002;Gong et al, 2009;Qin et al, 2009;Jiang et al, 2010;Wang et al, 2013, and references therein;Yang et al, 2015aYang et al, , 2015b. These plutons are an essential component of the early Mesozoic growth of the continental crust in the southern part of the Qinling orogenic belt and in central China.…”

Section: Introductionmentioning

confidence: 99%

Structure, geochronology, and petrogenesis of the Late Triassic Puziba granitoid dikes in the Mianlue suture zone, Qinling orogen, China

Yang

Deng

Dilek

et al. 2015

Geological Society of America Bulletin

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Detrital zircon U–Pb ages, Hf isotope, and geochemistry of Devonian chert from the Mianlue suture: Implications for tectonic evolution of the Qinling orogen

Cited by 31 publications

References 70 publications

Detrital zircon U–Pb ages from the Middle to Late Permian strata of the Yiyang area, southern North China Craton: Implications for the Mianlue oceanic crust subduction

Detrital zircon U–Pb ages from the Middle to Late Permian strata of the Yiyang area, southern North China Craton: Implications for the Mianlue oceanic crust subduction

Petrogenesis of Ore-Hosting Diorite in the Zaorendao Gold Deposit at the Tongren-Xiahe-Hezuo Polymetallic District, West Qinling, China

Structure, geochronology, and petrogenesis of the Late Triassic Puziba granitoid dikes in the Mianlue suture zone, Qinling orogen, China

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