Facies Changes, Evolution of Biogenic Structures, and Carbon Isotope Stratigraphy of the Cambrian Series 2 to Miaolingian Transition on the Southern North China Craton
The Cambrian Series 2–Miaolingian transition is a pivotal period during Earth history, which witnessed the decline of biodiversity and the reduction in biomass, i.e., the redlichiid–olenellid trilobite extinction. The notable δ<sup>13</sup>C excursion (RECE) near the Cambrian Series 2–Mi...
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MDPI AG
2022-11-01
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| author | Wen-Yi He Yong-An Qi Ming-Yue Dai Bing-Chen Liu Jing-Bo Li Gan-Xiao Xu Min Wang Da Li |
| author_facet | Wen-Yi He Yong-An Qi Ming-Yue Dai Bing-Chen Liu Jing-Bo Li Gan-Xiao Xu Min Wang Da Li |
| author_sort | Wen-Yi He |
| collection | DOAJ |
| description | The Cambrian Series 2–Miaolingian transition is a pivotal period during Earth history, which witnessed the decline of biodiversity and the reduction in biomass, i.e., the redlichiid–olenellid trilobite extinction. The notable δ<sup>13</sup>C excursion (RECE) near the Cambrian Series 2–Miaolingian boundary in east Gondwana and China apparently corresponds with the redlichiid trilobite extinction. To better understand the causal mechanism of this biotic crisis, we report the carbon isotope stratigraphy and facies changes from Cambrian Series 2–Miaolingian transition of the Mantou Formation on the southern North China Craton. The carbon isotope excursions at the Cambrian Series 2–Miaolingian transition in the study area are 0.7‰ in the Chishanhe section and −0.2‰ in the Luoquan section, respectively, showing a weak negative excursion or even no negative excursion. The sedimentary environments in the study area gradually changed through time from a clastic tidal flat to a carbonate platform across the transition, which indicated a gradual rise in sea level, with anoxic conditions occurring predominantly before the RECE δ<sup>13</sup>C excursion. Microbially induced sedimentary structures and oncoids occurred widely at the top of Cambrian Series 2. Abundant metazoan trace fossils were preserved in the Miaolingian Series of the study area. The evolution of biogenic structures across the Cambrian Series 2–Miaolingian transition indicates the emergence of harsh environments associated with the proliferation of MISS and oncoids at the RECE horizon and the recovery of benthic metazoan fauna after the RECE biotic crisis. |
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| spelling | doaj.art-8f684afda17941a39f31e679d1c326072023-11-24T16:51:17ZengMDPI AGMinerals2075-163X2022-11-011212152610.3390/min12121526Facies Changes, Evolution of Biogenic Structures, and Carbon Isotope Stratigraphy of the Cambrian Series 2 to Miaolingian Transition on the Southern North China CratonWen-Yi He0Yong-An Qi1Ming-Yue Dai2Bing-Chen Liu3Jing-Bo Li4Gan-Xiao Xu5Min Wang6Da Li7School of Resources and Environment, Henan Polytechnic University, Jiaozuo 454003, ChinaSchool of Resources and Environment, Henan Polytechnic University, Jiaozuo 454003, ChinaSchool of Resources and Environment, Henan Polytechnic University, Jiaozuo 454003, ChinaSchool of Resources and Environment, Henan Polytechnic University, Jiaozuo 454003, ChinaSchool of Resources and Environment, Henan Polytechnic University, Jiaozuo 454003, ChinaSchool of Resources and Environment, Henan Polytechnic University, Jiaozuo 454003, ChinaSchool of Resources and Environment, Henan Polytechnic University, Jiaozuo 454003, ChinaSchool of Resources and Environment, Henan Polytechnic University, Jiaozuo 454003, ChinaThe Cambrian Series 2–Miaolingian transition is a pivotal period during Earth history, which witnessed the decline of biodiversity and the reduction in biomass, i.e., the redlichiid–olenellid trilobite extinction. The notable δ<sup>13</sup>C excursion (RECE) near the Cambrian Series 2–Miaolingian boundary in east Gondwana and China apparently corresponds with the redlichiid trilobite extinction. To better understand the causal mechanism of this biotic crisis, we report the carbon isotope stratigraphy and facies changes from Cambrian Series 2–Miaolingian transition of the Mantou Formation on the southern North China Craton. The carbon isotope excursions at the Cambrian Series 2–Miaolingian transition in the study area are 0.7‰ in the Chishanhe section and −0.2‰ in the Luoquan section, respectively, showing a weak negative excursion or even no negative excursion. The sedimentary environments in the study area gradually changed through time from a clastic tidal flat to a carbonate platform across the transition, which indicated a gradual rise in sea level, with anoxic conditions occurring predominantly before the RECE δ<sup>13</sup>C excursion. Microbially induced sedimentary structures and oncoids occurred widely at the top of Cambrian Series 2. Abundant metazoan trace fossils were preserved in the Miaolingian Series of the study area. The evolution of biogenic structures across the Cambrian Series 2–Miaolingian transition indicates the emergence of harsh environments associated with the proliferation of MISS and oncoids at the RECE horizon and the recovery of benthic metazoan fauna after the RECE biotic crisis.https://www.mdpi.com/2075-163X/12/12/1526biogenic structurescarbon isotope stratigraphyfacies changesRECE |
| spellingShingle | Wen-Yi He Yong-An Qi Ming-Yue Dai Bing-Chen Liu Jing-Bo Li Gan-Xiao Xu Min Wang Da Li Facies Changes, Evolution of Biogenic Structures, and Carbon Isotope Stratigraphy of the Cambrian Series 2 to Miaolingian Transition on the Southern North China Craton Minerals biogenic structures carbon isotope stratigraphy facies changes RECE |
| title | Facies Changes, Evolution of Biogenic Structures, and Carbon Isotope Stratigraphy of the Cambrian Series 2 to Miaolingian Transition on the Southern North China Craton |
| title_full | Facies Changes, Evolution of Biogenic Structures, and Carbon Isotope Stratigraphy of the Cambrian Series 2 to Miaolingian Transition on the Southern North China Craton |
| title_fullStr | Facies Changes, Evolution of Biogenic Structures, and Carbon Isotope Stratigraphy of the Cambrian Series 2 to Miaolingian Transition on the Southern North China Craton |
| title_full_unstemmed | Facies Changes, Evolution of Biogenic Structures, and Carbon Isotope Stratigraphy of the Cambrian Series 2 to Miaolingian Transition on the Southern North China Craton |
| title_short | Facies Changes, Evolution of Biogenic Structures, and Carbon Isotope Stratigraphy of the Cambrian Series 2 to Miaolingian Transition on the Southern North China Craton |
| title_sort | facies changes evolution of biogenic structures and carbon isotope stratigraphy of the cambrian series 2 to miaolingian transition on the southern north china craton |
| topic | biogenic structures carbon isotope stratigraphy facies changes RECE |
| url | https://www.mdpi.com/2075-163X/12/12/1526 |
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