Biome responses to a hydroclimatic crisis in an Early Cretaceous (Barremian–Aptian) subtropical inland lake ecosystem, Northwest China

Zhang, Kun; Liu, Rong; Bai, Edith; Zhao, Zelin; Peyrotty, Giovan; Fathy, Douaa; Chang, Qing; Liu, Ziping; Yang, Kai; Xu, Chuan; Liu, Zhaojun

doi:10.1016/j.palaeo.2023.111596

Cited by 17 publications

(18 citation statements)

References 157 publications

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“…The residual organic matter is substantially consumed by diagenetic processes, which can be preserved in the sedimentary rock . Therefore, the analyzed TOC values might be affected by other factors (e.g., detrital dilution, redox conditions, and sedimentation rates) except for marine productivity . Strong detrital input can dilute organic matter in the sediment .…”

Section: Discussionmentioning

confidence: 99%

Reduction in Marine Primary Productivity in the Early Cambrian Nanhua Basin, South China

Jin,

Zhang,

Cheng

et al. 2024

ACS Omega

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The Cambrian explosion is represented by a rapid diversification of early animals in which the role of marine primary productivity remains obscure. In this study, we analyzed multiple geochemical data, including TOC, major, and trace elements, in the basinal Yuanjia section, South China. Covariations among TOC, P/Al, Cu EF , and Ni EF suggest that they could be taken as effective marine productivity proxies in the early Cambrian Nanhua Basin. The similarities of Cd EF and Cd/Mo in the Nanhua Basin and modern upwelling settings suggest that they might be effective to track upwelling, where Cd and Mo were mainly controlled by plankton biomass and redox conditions, respectively. Our results indicate that Co EF and Co × Mn were invalid in evaluating upwelling because of the significant effects of water-column redox conditions on Co enrichments in the Nanhua Basin. The decreased TOC, P/Al, Cu EF , and Ni EF reflect a long-term decline in marine productivity from late age 2 to age 3. In comparison with the published results in the outer shelf (Jinsha, TZS drill core, YJK drill core, and GDM-1 well) and slope areas (TX-1 well), the fall in marine productivity might be common in the early Cambrian Nanhua Basin. Our results exhibit that the reduced marine productivity was accompanied by weakened upwelling, quiet hydrothermal activities, and enhanced local terrestrial fluxes, indicating that variations in marine productivity might be mainly driven by the development of upwelling in the early Cambrian Nanhua Basin. Comparison of marine productivity with fossil records suggests that food availability was sufficient to sustain the Cambrian explosion in the Nanhua Basin. We infer that marine productivity might indirectly stimulate early animal evolution through its significant impact on water-column oxygen levels in the early Cambrian Nanhua Basin.

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Section: Discussionmentioning

confidence: 99%

Reduction in Marine Primary Productivity in the Early Cambrian Nanhua Basin, South China

Jin,

Zhang,

Cheng

et al. 2024

ACS Omega

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“…In order to evaluate the in uence of hydrothermal activity, the ratios (Fe + Mn)/Ti and Al/(Al + Fe + Mn) were calculated (Boström et al, 1973;Murray, 1994;Madondo et al, 2021;Zhang et al, 2023). Moreover, an Al-Fe-Mn ternary diagram was also used to differentiate between hydrothermal, detrital or biogenic origins (Adachi et al, 1986).…”

Section: Elemental Analysismentioning

confidence: 99%

“…Hydrothermal deposits often show high concentrations of iron and manganese, while aluminum and titanium are reliable indicators of sedimentary input (Boström et al, 1973;Adachi et al, 1986;Murray, 1994;Zhang et al, 2023). This is why many research studies use the ratios (Fe + Mn)/Ti and Al/(Al + Fe + Mn) to identify hydrothermal in uence (Table 5).…”

Section: Origin Of Cherts and Other Facies Potentially Generated In H...mentioning

confidence: 99%

“…The results obtained in the analysis of the chert samples from the Baza Basin are compatible with a hydrothermal origin for them if we consider other evidence (see below) and also according to the Al-Fe-Mn contents and main trace elements present in the siliceous rocks of the North Paci c (Adachi et al, 1986). On the opposite, the (Fe + Mn)/Ti and Al/(Al + Fe + Mn) ratios have been used in sediments to determine their hydrothermal origin (Boström et al, 1973;Murray, 1994;Zhang et al, 2023). Therefore, the data obtained from the chert samples are expected to be more reliable than those derived from samples without chert contents.…”

Section: Origin Of Cherts and Other Facies Potentially Generated In H...mentioning

confidence: 99%

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Plio-Pleistocene hydrothermal events of the Baza Basin (Betic Cordillera, SE Spain) and their paleoecological implications

García-Aguilar,

Campaña,

Martínez-Navarro

et al. 2024

Preprint

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The Early Pliocene to late Middle Pleistocene continental sedimentary infillings of the Baza Basin (Guadix-Baza Depression, SE Spain) are worldwide unique by their high stratigraphic completeness and exceptional preservation of their fossil record of terrestrial vertebrates. These sediments were deposited in fluvio-lacustrine environments and preserve huge assemblages of large mammals, including the oldest evidence of hominin presence in Western Europe at the late Early Pleistocene sites of Barranco León and Fuente Nueva-3, dated to ∼1.4 Ma. Since latest Miocene times, the basin was subject to intense tectonic activity, showing sedimentary deposits originated from ancient hot springs. These hot springs were developed in a spatio-temporal network related to tectonic fractures, showing a higher concentration in the Orce sub-basin during Late Pliocene to Holocene times. Compositional analyses of cherts and other facies associated with these hot springs show geochemical and mineralogical markers linked to hydrothermal scenarios. The contribution of hot springs in the Baza Basin resulted in rich and productive biotopes, which supported a high diversity and biomass of terrestrial mammals. Similar geological, hydrochemical and ecological environments are found along hotspot lines in East Africa, the Levantine Corridor and the circum-Mediterranean realm. We hypothesize here that the presence of these hot springs corridors favored the dispersal of hominins and other large mammals during the Plio-Pleistocene, which led to the first hominin arrival in Europe.

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“…Most research on rock weathering and stone decay has focused on granite and limestone, while there is little research on the weathering of sandstone . Determining the degree of rock weathering has undergone from qualitative to quantitative . According to the specification, the classification of rock weathering degree from a qualitative perspective (color, secondary minerals, degree of development of joints and fissures, degree of integrity, and hydrologic properties) has been widely recognized in engineering practice .…”

Section: Introductionmentioning

confidence: 99%

“Iron Ion Relative Weathering Index”: A New Index for Identifying the Weathering Degree in Red Sandstone

Li,

Yang,

Jiang

et al. 2024

ACS Omega

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The red bed region in west central and southern China is affected by hot and humid climate, where sandstone is intensely weathered. The weathered hazardous rocks seriously threaten the road and slope, making it challenging to protect the Danxia red bed. After considering the red sandstone's material composition and the local area's main weathering effects. We noticed that iron ions in red sandstone are susceptible to weathering, which leads to changes in the valence and content of iron ions. This study attempts to establish a new chemical weathering index called the "iron ion relative weathering index" (IRWI) to classify the weathering degree of red sandstone. This paper mainly explores the changes of physical characteristics (mineral composition, physical indicator, microstructure, and pore structure) from the surface to the interior of red sandstone in the actual environment and their correlation with IRWI. The study on the correlation between the physical indicators such as longitudinal wave velocity, resistivity, density, water absorption, and IRWI reveals that they have the same trends and are closely related to the weathering degree. The shallow weathering zone of Chishui red sandstone is divided into strong, medium, and slight weathering zones. Microscopically, the cementation and pore distribution of the red sandstone are consistent with the characteristics of the weathering zone. Therefore, IRWI not only is a reliable chemical quantitative method in indicating the weathering of red sandstone but also takes into account the controlling role of iron in the color development of red beds, which provides a new research idea for the quantitative identification of weathering degree and color mechanism of red sandstone.

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Biome responses to a hydroclimatic crisis in an Early Cretaceous (Barremian–Aptian) subtropical inland lake ecosystem, Northwest China

Cited by 17 publications

References 157 publications

Reduction in Marine Primary Productivity in the Early Cambrian Nanhua Basin, South China

Reduction in Marine Primary Productivity in the Early Cambrian Nanhua Basin, South China

Plio-Pleistocene hydrothermal events of the Baza Basin (Betic Cordillera, SE Spain) and their paleoecological implications

“Iron Ion Relative Weathering Index”: A New Index for Identifying the Weathering Degree in Red Sandstone

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