New thinking and understanding for the researches on the basement of Ordos Block

Zhang, Chengli; Gou, Longlong; Bai, Haifeng; Hu, Yang; ChunYing, WU

doi:10.18654/1000-0569/2021.01.11

Cited by 13 publications

(2 citation statements)

References 117 publications

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“…Kernel density estimates (KDEs) and histograms of U–Pb ages binned at 50 myr intervals from detrital zircons in the western North China Craton (Western NCC, Bai et al., 2019; Darby & Gehrels, 2006; Wang et al., 2016; Zhang et al., 2021), detrital zircons in the southern Transitional North China Orogen (Southern TNCO, Li et al., 2013, 2020; Liu et al., 2021; Wang, 2020), detrital zircons in the Longshan Complex (He et al., 2005; Xu, 2018), detrital zircons of Permian covers in the northern division of the West Qinling area (d) (Gao et al., 2019), detrital and magmatic zircons in the North Qinling orogenic belt (NQOB; Diwu et al., 2010, 2014; Yang et al., 2010; Zhu et al., 2011), detrital and magmatic zircons in the South Qinling Orogenic Belt (SQOB, Xu et al., 2014; Zeng et al., 2021; Zhu et al., 2014), magmatic zircons in the Qilian Orogenic Belt (QLOB, Gao et al., 2021; Wu et al., 2017) and all the detrital zircons of six submarine fan samples in the Panyuan section.…”

Section: Discussionmentioning

confidence: 99%

High‐frequency temporal variability of provenance signal in the submarine fan with the narrow shelf: Insights from sediment delivery and formation of late Triassic Zhuoni fan in the northeastern Paleo‐Tethys Ocean

Tan,

Sun,

et al. 2023

Basin Research

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The submarine fan with a narrow shelf is usually reactive to environmental signal propagation; however, source‐to‐sink functioning can be further complicated by several allogenic forcings. Here, we document the high‐frequency provenance variations and different sediment delivery models recorded in the late Triassic Zhuoni fan developed in the northeastern Paleo‐Tethys Ocean, mainly based on process‐based sedimentological and provenance study of the Panyuan section in the West Qinling area in the northeastern margin of Tibetan Plateau. High‐, low‐density turbidites, hybrid event beds and hyperpycnites are distributed in the lobe‐dominated submarine fan succession. Field sedimentological evidence from surrounding outcrops suggests that shelf‐edge failure was the main cause of most high‐ and low‐density turbidites with the overall absence of submarine slides or slumps, whereas the narrow shelf configuration together with late Triassic humid pulses is favourable for the occurrence of flood‐related hyperpycnites in the Zhuoni fan. Detrital zircon grains (N = 6; n = 123–272) generally have Palaeozoic‐Mesozoic ages (ca. 350–250 Ma and 500–400 Ma) and Neoarchean‐Paleoproterozoic ages (ca. 2100–1750 Ma and 2600–2400 Ma), but they can be further categized into three age groups due to different proportions of Precambrian age populations. The results demonstrate that the potential source areas may include the South and North Qinling Orogenic Belt, Qilian Orogenic Belt, different segments of North China Craton and the tectonic junction area between the Qinling and Qilian Orogenic Belts. The temporal changes in provenance signals, which are reflected by both the detrital zircon age spectra and heavy mineral assemblages, indicate different contributions of those sources in response to sea‐level fluctuation. It could thus give rise to temporal variations between reactive and buffered source‐to‐sink sediment delivery models of the Zhuoni fan, despite the overall narrow shelf configuration. The development of the lowstand Zhuoni fan was directly related to extrabasinal hyperpycnal delivery from the river mouth and its high‐frequency provenance variability recorded different efficiencies of signal transfer through the onshore catchment with significantly influence of temporal storage, fluvial rejuvenation or even regional climate variability. The highstand submarine fan was thought to be formed by shelf‐edge failure with sediment buffering in the shelf region, which was associated with a strong magnitude of provenance mixing. Our work provides a new perspective for deciphering the different origins of deep‐water sediment delivery in response to high‐frequency sea‐level and climate changes.

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Section: Discussionmentioning

confidence: 99%

High‐frequency temporal variability of provenance signal in the submarine fan with the narrow shelf: Insights from sediment delivery and formation of late Triassic Zhuoni fan in the northeastern Paleo‐Tethys Ocean

Tan,

Sun,

et al. 2023

Basin Research

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“…The Precambrian metamorphic basement in KB is mainly exposed in Jining, Liangcheng, and Zhuozi in the east; Daqingshan and Wulashan in the middle; and Qianlishan and Helanshan in the west. In recent years, drilling data have revealed that there are khondalite series in the Ordos basement, and their rock assemblages and metamorphic ages are similar to those of the KB (Hu et al, 2013;Wan et al, 2013a;Gou et al, 2016;He et al, 2016;Zhang et al, 2021), and so the KB may be more widely distributed. The KB is mainly composed of khondalite series and garnet granites, meta-gabbronorites, and charnockites.…”

Section: Geological Settingmentioning

confidence: 99%

Petrogenesis of the ~1.94 Ga Meta‐gabbronorites in Liangcheng: Implications for Tectonic Evolution of the Khondalite Belt, North China Craton

GuangHui

Ren

Shi

et al. 2023

Acta Geologica Sinica (Eng)

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We investigated the meta‐gabbronorites in Liangcheng and used detailed petrography, geochemistry, zircon geochronological and in‐situ Hf isotopic studies to clarify their formation and metamorphic ages, petrogenesis, tectonic setting and provide constraints on the tectonic evolution of Khondalite Belt (KB). The zircon U‐Pb dating results show that the meta‐gabbronorites crystallized at ~1.94 Ga and were metamorphosed at ~1.91–1.89 Ga. They can be subdivided into the low‐Mg and high‐Mg groups. The low‐Mg meta‐gabbronorites contain relatively lower MgO and higher SiO2 contents than high‐Mg meta‐gabbronorites. They are enriched in light rare earth elements and large ion lithophile elements, depleted in high field strength elements, and exhibit positive (high‐Mg meta‐gabbronorites) and negative (low‐Mg meta‐gabbronorites) Sr and Eu anomalies. The zircon in‐situ εHf(t) of meta‐gabbronorites is 0.07–4.12, with Hf model ages (TDM) of 2169–2400 Ma. The meta‐gabbronorites in Liangcheng originated from the asthenospheric mantle and experienced fractional crystallization of olivine, orthopyroxene, clinopyroxene, and plagioclase. They were contaminated by the crustal rocks (mainly khondalite series) during ascent, especially for low‐Mg gabbronorites. The ridge subduction is the most plausible tectonic setting for meta‐gabbronorites, indicating the eastern segment of KB was in a ridge subduction setting at ~1.94 Ga following an orogenic thickening event during a prolonged orogenic process.

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Neoarchean SSZ and MOR ultra-/high-pressure ophiolitic mélanges of the Eastern Hebei Complex, North China Craton: Dynamics of an Archean paleo-subduction zone

Ning

Kusky

Wang

et al. 2023

Earth-Science Reviews

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New thinking and understanding for the researches on the basement of Ordos Block

Cited by 13 publications

References 117 publications

High‐frequency temporal variability of provenance signal in the submarine fan with the narrow shelf: Insights from sediment delivery and formation of late Triassic Zhuoni fan in the northeastern Paleo‐Tethys Ocean

High‐frequency temporal variability of provenance signal in the submarine fan with the narrow shelf: Insights from sediment delivery and formation of late Triassic Zhuoni fan in the northeastern Paleo‐Tethys Ocean

Petrogenesis of the ~1.94 Ga Meta‐gabbronorites in Liangcheng: Implications for Tectonic Evolution of the Khondalite Belt, North China Craton

Neoarchean SSZ and MOR ultra-/high-pressure ophiolitic mélanges of the Eastern Hebei Complex, North China Craton: Dynamics of an Archean paleo-subduction zone

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