Middle Triassic to Late Jurassic climate change on the northern margin of the South China Plate: Insights from chemical weathering indices and clay mineralogy

Dai, Xianduo; Du, Yu; Ziegler, Martin; Wang, Chaowen; Ma, Qiang; Chai, Rong; Guo, Huaming

doi:10.1016/j.palaeo.2021.110744

Cited by 16 publications

(8 citation statements)

References 98 publications

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“…The overlying Suining Formation is 200-600 m thick and composed of bright mudstones interbedded with siltstone (BGMRSP, 1991). A minimum detrital zircon U-Pb age of 163.5 ± 2.0 Ma obtained from 2.5 m above the boundary between the Shaximiao and Suining Formations suggests that the Suining Formation corresponds to the basal age of the Late Jurassic Oxfordian stage (Dai et al, 2022). The Penglaizhen Formation is the uppermost Jurassic stratigraphic unit with a thickness of 100-1,200 m, and it is composed of mudstone interbedded with siltstone in the upper member, mudstone in the middle member and sandstone intercalated with mudstone at the lower member (Fig.…”

Section: Geological Settingmentioning

confidence: 92%

“…More recent work by Yi et al (2019) on paleomagnetic data and ages from Jurassic volcanic rocks in North China suggested that the large-scale true polar wander should be responsible for remarkable climate change (i.e., the "great Jurassic east Asian aridification") over an area of ~10,000,000 square kilometers in East Asia during the Jurassic (165-155 Ma). The paleogeographic position reconstruction of the South China Craton (Dai et al, 2022) illustrated that the South China Craton was located at a paleolatitude of 39.4° ± 4.5°N during the early Early-Middle Jurassic (Supp. Fig.…”

Section: Regional Paleoaridity Variationsmentioning

confidence: 99%

“…Age models adapted from Ogg and Gradstein (2016). The ages of 170 and 163.5 ± 2.0 Ma are from Li et al (2021) and Dai et al (2022), respectively. Abbreviations: T-P = Triassic-Paleozoic; S1 = Mianyang transect; S2-1/-2/-3 = Guangyuan transect; S3, S4, and S5-1/-2 = Dazhou transects; S6, S7, S8, and S9-1/-2 = Suining transects; S10-1/-2/-3 = Emeishan transect; S11-1/-2/-3/-4, and S12-1/-2/-3 = Chongqing transects; Formation (w) = Formations distributed among the whole basin; Fm (n) = Formation located in the northern Sichuan Basin.…”

Section: Geological Settingmentioning

confidence: 99%

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Multiproxy Paleosol Evidence for Jurassic Paleoclimate Fluctuations in the Sichuan Basin, SW China

Wen

Pan

et al. 2022

Acta Geologica Sinica (Eng)

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Paleoclimate reconstruction of continental environments has been hampered by the limited evidence. A thick sequence of Jurassic continental deposits in the Sichuan Basin, Southwest China yields abundant paleosols that may offer valuable insights regarding Jurassic climate scenarios. A succession of 169 paleosols belonging to Protosols, Calcisols, and Argillisols from 23 detailed stratigraphic sections was recognized and characterized macro‐ and micromorphologically and assessed for mineral and geochemical compositions. Quantitative paleoclimate reconstructions using bulk geochemical proxies, the depth to and the stable oxygen isotopic composition of paleosol carbonates indicated a predominant alternation of semiarid and arid cool/warm‐temperate climatic conditions punctuated by several episodes of subhumid and humid climates that generally prevailed in the Sichuan Basin during the Jurassic. The estimated paleoatmospheric CO2 concentrations (pCO2) from calcic paleosols yielded a low range of ∼104 ± 58 to ∼610 ± 152 ppmv during the Middle Jurassic. The terrestrial paleotemperature changes in the Sichuan Basin coincided with the pCO2 variations, which probably resulted from global geological events (e.g., volcanic activities, magmatic and oceanic events, and the ephemeral caps development) in the Middle Jurassic. Jurassic climatic fluctuations in the basin were likely attributed to true polar wander due to global plate motion, megamonsoon effect linked to global and regional paleogeography, and regional paleotopography.

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Section: Geological Settingmentioning

confidence: 92%

Section: Regional Paleoaridity Variationsmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

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Multiproxy Paleosol Evidence for Jurassic Paleoclimate Fluctuations in the Sichuan Basin, SW China

Wen

Pan

et al. 2022

Acta Geologica Sinica (Eng)

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“…The chemical weathering of source rocks can be assessed using the chemical index of alteration proposed by Nesbitt and Young [16], the chemical index of weathering which removes K 2 O to eliminate the influence of potassium metasomatism [47], and the plagioclase index of alteration which adjusts the K 2 O and Al 2 O 3 contribution from potassium feldspar and monitors the degree of plagioclase weathering that has been successfully used for the reconstruction of paleoweathering [48][49][50][51][52][53][54][55][56][57][58].…”

Section: Paleoweatheringmentioning

confidence: 99%

Geochemistry of marine black shale of the Cambrian Qiongzhusi Formation, Yangtze Plate, SW China: implications for provenance and paleoweathering

Fang,

Guo,

Liu

2023

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Marine black shale in the Lower Cambrian Qiongzhusi (QZS) Formation in the southwestern Yangtze Plate, SW China, is the key target for shale gas development. The paleoenvironment plays an important role in the formation of organic-rich shale. Based on the analysis of major, trace and rare earth elements (REE), the authors discussed element composition, paleoweathering and provenance of Qiongzhusi black shale (QZS shale). The results show that the main components of the Qiongzhusi Formation sample are SiO 2 , Al 2 O 3 and total Fe 2 O 3 (TFe 2 O 3 ), with the average values of 64.08 wt%, 15.00 wt% and 5.39 wt%, respectively. Redox-sensitive elements, such as V, Cr, Ni, Zn and U, are richer in QZS shale compared to the upper continental crust (UCC). The total concentration of REE (∑REE) of QZS shale is 174.58 ppm on average, which is higher than that of UCC (average 146.37 ppm) and the North American Shale Composite (NASC) (average 173.21 ppm). The ratios of w(SiO 2 )/w(Al 2 O 3 ) and w(Al 2 O 3 )/w(TiO 2 ), the Zr-TiO 2 diagram, the Th/Sc vs Zr/Sc plot, the discriminant function of F1 vs F2 and F3 vs F4, as well as the discrimination diagram of ∑REE vs La/Yb indicated that the main provenances of QZS shale are sedimentary and felsic igneous rocks. The values of a chemical weathering index, the chemical index of alteration (CIA), of the Lower QZS Formation (Stage 1) range from 51.84 to 64.33, indicating a low degree of chemical weathering and a cold and dry climate. The CIA values of the Upper QZS Formation (Stage 2) range from 66.58 to 82.42, being indicative of a medium degree of chemical weathering, probably in a humid climate.

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“…During the sedimentary period of the Jurassic Shaximiao Formation (175 to 156 Ma), the Sichuan Basin was a foreland lacustrine basin (Meng et al ., 2005; Liu et al ., 2017; Li et al ., 2018a). This basin was characterized by gentle slope topography, sufficient sediment supply and variable climate (Zhang et al ., 2021a,b; Dai et al ., 2022). Many channelized sand bodies developed, primarily interpreted as fluvial deposits (Liu et al ., 2017; Zhang et al ., 2021b), although some groups have argued that they represent delta deposits (Meng et al ., 2005).…”

Section: Introductionmentioning

confidence: 99%

Evolution from shallow‐water deltas to fluvial fans in lacustrine basins: A case study from the Middle Jurassic Shaximiao Formation in the central Sichuan Basin, China

Yang,

Li,

Yang

et al. 2023

Sedimentology

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Distinguishing between shallow‐water delta and fluvial fan deposits in the subsurface of lacustrine basins is challenging due to their similar depositional characteristics and distribution patterns. This study focuses on the Middle Jurassic Shaximiao Formation in the central Sichuan Basin using core observations, seismic analyses, petrology analyses, zircon analyses, palaeoclimate indicators and palaeocurrent analyses to address this issue. Fifteen sedimentary lithofacies and eight lithofacies associations were established, corresponding to channelized fluvial deposits, non‐channelized fluvial deposits and shallow‐water delta deposits. Shallow‐water deltas are dominated by channels and mouth‐bar complexes with grey, red and green interbedded mudstone. Shingled seismic reflection, green mud clasts, small burrows and wave ripples are common with occasional palaeosols. Fluvial fans are dominated by channels and crevasse‐splays with pink colour and accompanied by red coloured floodplain deposits. Bright spot seismic reflection, red mud clasts, big burrows, current ripples and palaeosols are common. The increased uplift of the Dabashan Mountains controls the palaeocurrent direction, promoting the evolution from a shallow‐water delta in relatively humid environments to a fluvial fan in relatively arid environments. The channel widths in shallow‐water deltas are wider than those in fluvial fans, whereas the opposite applies for the channel amalgamation rate. Highly frequent channel‐width variations are controlled by short‐cycle climate fluctuation, corresponding to chemical index of alteration value fluctuations in different sandstone groups. The channel width in the relatively humid environments is wider than that in arid environments for both shallow‐water deltas and fluvial fans. It is likely that the sedimentary evolution from shallow‐water deltas to fluvial fans is relatively common in lacustrine basins in relatively arid environments with wide and gentle slope landforms.

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Middle Triassic to Late Jurassic climate change on the northern margin of the South China Plate: Insights from chemical weathering indices and clay mineralogy

Cited by 16 publications

References 98 publications

Multiproxy Paleosol Evidence for Jurassic Paleoclimate Fluctuations in the Sichuan Basin, SW China

Multiproxy Paleosol Evidence for Jurassic Paleoclimate Fluctuations in the Sichuan Basin, SW China

Geochemistry of marine black shale of the Cambrian Qiongzhusi Formation, Yangtze Plate, SW China: implications for provenance and paleoweathering

Evolution from shallow‐water deltas to fluvial fans in lacustrine basins: A case study from the Middle Jurassic Shaximiao Formation in the central Sichuan Basin, China

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