Sedimentary environments of the Middle Permian phosphorite–chert complex from the northeastern Yangtze platform, China; the Gufeng Formation: a continental shelf radiolarian chert

Kametaka, Masao; Takebe, Masamichi; Nagai, Hiromi; Zhu, Sizhao; Takayanagi, Yukio

doi:10.1016/j.sedgeo.2004.12.005

Cited by 98 publications

(74 citation statements)

References 40 publications

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“…An important source of the manganese in this area probably came from sea-floor volcanism or hydrothermal activity, perhaps associated with syn-sedimentary faults. This is supported by the presence of argillaceous volcanic rock in the Gufeng formation of Permian of the Lower Yangtze area (Kametaka et al, 2005;Xia et al, 1994Xia et al, , 1995Yang and Yao, 2008;Zhu et al, 2012) and Early Permian magmatism in southeastern China coastal region (Li et al, 2012b). Moreover, the extremely high Mn/Fe ratios of Mn ores (>5, up to 39.7; Table 2) are consistent with fractionation of manganese and iron during hydrothermal transport and mineralization (Glasby, 2000).…”

Section: Sources Of Manganesementioning

confidence: 64%

“…Hydrothermal activities may supply nutrition, and are beneficial to the reproduction of siliceous organisms and other organisms, and generally increase biological activity. This is supported by the presence of volcanic ash beds in the Gufeng formation of Permian of the Lower Yangtze area (Xia et al, 1994(Xia et al, , 1995Kametaka et al, 2005;Yang and Yao, 2008;Zhu et al, 2012) and shale with abundant fossils among volcanic beds (Zhu et al, 2012).…”

Section: Genesis Of Siliceous Rock Of the Gufeng Formationmentioning

confidence: 93%

“…The origin of the bedded siliceous rocks is a matter of a long-term debate, with different models ranging from hydrothermal genesis (Adachi et al, 1986;Xia et al, 1995;Zeng et al, 2004), to biogenesis (Garrison and Fischer, 1969;Yang and Yao, 2008;Zhu et al, 2012), and upwelling genesis (Kametaka et al, 2005;Lü and Zhai, 1989 ratios, Co/ Ni < 1, U/Th > 1. As discussed above, the Eu anomalies of the analyzed samples (Fig.…”

Section: Genesis Of Siliceous Rock Of the Gufeng Formationmentioning

confidence: 99%

See 2 more Smart Citations

Geochemical studies on Permian manganese deposits in Guichi, eastern China: Implications for their origin and formative environments

Xie

Sun

et al. 2013

Journal of Asian Earth Sciences

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Section: Sources Of Manganesementioning

confidence: 64%

Section: Genesis Of Siliceous Rock Of the Gufeng Formationmentioning

confidence: 93%

Section: Genesis Of Siliceous Rock Of the Gufeng Formationmentioning

confidence: 99%

See 1 more Smart Citation

Geochemical studies on Permian manganese deposits in Guichi, eastern China: Implications for their origin and formative environments

Xie

Sun

et al. 2013

Journal of Asian Earth Sciences

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“…However, where reliable palaeodepth estimates and palaeoenvironmental constraints do occur, they can indicate a depositional setting for pelagic sediments for which there is no modern analogue. For example, Stow et al (1996) were able to demonstrate that the pelagic Upper Cretaceous Chalk of northern Europe, which contains abundant silica in the form of flint, was deposited on a continental shelf with water depths as shallow as 50 m. Kametaka et al (2005) and Takebe et al (2007) describe a radiolarian chert sequence, the Middle Permian Gufeng Formation on the north-eastern Yangtze platform in China, that was deposited on a continental shelf under suboxic-anoxic conditions caused by organic matter produced during upwelling; the latter possibly also leading to high radiolarian productivity. They conclude that such shelf-type radiolarian cherts are deposited in poorly aerated restricted basins, or in an oxygenminimum zone.…”

Section: Chert Deposition and Palaeo Water Depth Within The Neotethysmentioning

confidence: 99%

“…the Middle Permian Gufeng Formation, Kametaka et al 2005;Takebe et al 2007). The condensed, chert-dominated sequences represented by the Shamal and Sid'r chert formations may simply record the fact that the basin was effectively starved (i.e.…”

Section: Chert Deposition and Palaeo Water Depth Within The Neotethysmentioning

confidence: 99%

The Jurassic–Cretaceous depositional and tectonic evolution of the southernwestern margin of the Neotethys Ocean, Northern Oman and United Arab Emirates

Phillips

Waters

Ellison

2012

Lithosphere Dynamics and Sedimentary Basins: The Arabian Plate and Analogues

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The concept that the autochthonous, parautochthonous and allochthonous Permian-Cretaceous sequences in the United Arab Emirates (UAE) and Oman record the transition from platform, slope to basin sedimentation within the southern part of Neotethys has been fundamental to the interpretation of the geological history of the region. The results of a major geological mapping programme of the UAE, carried out by the British Geological Survey for the Federal Government of the UAE, coupled with the detailed examination of key sections within northern Oman has led to a re-evaluation of the geological evolution of this region. This detailed study has led to a greater appreciation of the sedimentology and depositional setting of the sediments laid down along the northeastern Arabian continental margin during the Jurassic to Cretaceous, allowing a more refined model of Neotethys Ocean basin evolution to be established. The model charts the progressive breakup of the Arabian continental margin and closure of Neotethys during the mid to late Cretaceous and is divided into three main stages: Stage 1 -Initial rifting and formation of the Neotethys Ocean, followed by a prolonged period of stable, passive margin sedimentation which extended from the Permian to Late Jurassic times; Stage 2 -Uplift and erosion of the shelf margin during the Late Jurassic to Early Cretaceous, coincident with increased carbonate-clastic sedimentation in the outer ramp, distal slope and basinal areas; Stage 3 -Increased instability during the Late Cretaceous leading to the breakup of the platform margin and foreland basin sedimentation accompanying the obduction of the Oman-UAE ophiolite. Data obtained for the upper part of the platform and platform margin to slope successions has revealed that the topography of the "shelf"-slope-basinal margin was more subdued than previously thought, with this more gentle ramp margin morphology persisting until early to midCretaceous times when the platform margin started to become unstable during ophiolite obduction. The thrust-repeated allochthonous sedimentary rocks of the Hamrat Duru Group were deposited on the outer platform margin/lower slope rise to basinal plain of this basin margin and includes the dismembered remains of two turbidite fan systems which fed carbonate-rich detritus into deeper parts of the ocean. A re-evaluation of the chert-rich sequences, previously equated with deposition on the abyssal plain of Neotethys, has led to the conclusion that they may record sedimentation at a much shallower level within a starved ocean basin, possibly in a mid-ramp (above storm wave base) to outer ramp setting. A marked change in basin dynamics occurred during the mid-Cretaceous leading to the development of a shallow ramp basin margin in Oman with terrestrial to shallow marine sedimentary rocks interdigitating with red siliceous mudstones. By contrast, the contemporaneous succession in the Dibba Zone of the UAE indicates considerable instability on a steep shelf break. This instability is recorded by t...

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Geochemical features of the Middle–Upper Permian cherts and implications for origin, depositional environment in the Sichuan Basin, SW China

Lin

Deng

et al. 2019

Geological Journal

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Permian cherts are widely developed in the Sichuan Basin and carry significant information about the evolution of the sedimentary environment. To understand the origins and depositional environments of the Middle–Upper Permian cherts in the Sichuan Basin, we studied the lithological and geochemical characteristics of the cherts. Based on field observations and thin section analysis, Permian cherts occur mainly in the form of nodular and bedded cherts. Nodular cherts present irregular lumps or tuberculous patterns and are composed of mostly cryptocrystalline and microcrystalline quartz with small amounts of carbonate mineral. Bedded cherts contain organic matter, and radiolarians can be found in Late Permian bedded cherts. The geochemical analysis of Permian cherts shows that the chert sources are complex; nodular Middle Permian cherts show hydrothermal and upwelling influences, with less terrestrial influence. Nodular chert is the product of diagenetic metasomatism, formed when silica‐rich fluids entered carbonate that was partially dissolved by H+ released from the oxidation of H2S. Bedded cherts of the Maokou Formation have the same source as nodular cherts but were deposited in a slope or depression of the platform, which was below the CaCO3 compensation depth (CCD) interface, so that bedded chert could be deposited directly. Bedded cherts of the Wujiaping Formation show influence from hydrothermal, biogenetic, and terrestrial sources and were deposited in a deeper water environment, such as basin or the bottom of slope. The Permian cherts in the Sichuan Basin are the response to the global Permian Chert Event (PCE), which was closely related to the Late Palaeozoic Ice Age (LPIA) and the global active volcanism during the Permian.

show abstract

Sedimentary environments of the Middle Permian phosphorite–chert complex from the northeastern Yangtze platform, China; the Gufeng Formation: a continental shelf radiolarian chert

Cited by 98 publications

References 40 publications

Geochemical studies on Permian manganese deposits in Guichi, eastern China: Implications for their origin and formative environments

Geochemical studies on Permian manganese deposits in Guichi, eastern China: Implications for their origin and formative environments

The Jurassic–Cretaceous depositional and tectonic evolution of the southernwestern margin of the Neotethys Ocean, Northern Oman and United Arab Emirates

Geochemical features of the Middle–Upper Permian cherts and implications for origin, depositional environment in the Sichuan Basin, SW China

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