Earth-Science Reviews, Journal Year: 2024, Volume and Issue: unknown, P. 104971 - 104971
Published: Nov. 1, 2024
Language: Английский
Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)
Published: Sept. 2, 2024
The Permo-Triassic mass extinction was linked to catastrophic environmental changes and large igneous province (LIP) volcanism. In addition the widespread marine losses, Permo–Triassic event most severe terrestrial ecological crisis in Earth's history only known among insects, but cause of on land remains unclear. this study, high-resolution Hg concentration records multiple-archive S-isotope analyses sediments from Junggar Basin (China) provide evidence repeated pulses volcanic-S (acid rain) increased loading culminating a biota coeval with interval LIP emplacement. Minor are, however, inconsistent total ozone layer collapse. Our data suggest that volcanism repeatedly stressed end-Permian environments ~300 kyr preceding locally via S-driven acidification deposition Hg, globally pulsed CO2. geochemistry across Permian–Triassic (252 Ma) provides volcanic eruptions over drove poisoning palaeo-lacustrine ecosystem northwest China.
Language: Английский
Citations
2
Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)
Published: April 14, 2023
The exact drivers for the end-Permian mass extinction (EPME) remain controversial. Here we focus on a ~10,000 yr record from marine type section at Meishan, China, preceding and covering onset of EPME. Analyses polyaromatic hydrocarbons sampling intervals representing 1.5-6.3 reveal recurrent pulses wildfires in terrestrial realm. Massive input soil-derived organic matter clastic materials into oceans are indicated by patterns C2-dibenzofuran, C30 hopane aluminum. Importantly, ~2,000 years main phase EPME, observe clearly defined sequence wildfires, soil weathering, euxinia provoked fertilization environment with nutrients. Euxinia is sulfur iron concentrations. Our study suggests that, South centennial scale processes led to collapse ecosystem ~300 (120-480 yr; ± 2 s.d.) before EPME that this induced euxinic conditions ocean, ultimately resulting demise ecosystems.
Language: Английский
Citations
6
Earth and Planetary Science Letters, Journal Year: 2023, Volume and Issue: 614, P. 118194 - 118194
Published: May 17, 2023
Language: Английский
Citations
6
Geochemistry Geophysics Geosystems, Journal Year: 2023, Volume and Issue: 24(6)
Published: June 1, 2023
Abstract Anomalous mercury (Hg) contents recorded near the Permian‐Triassic boundary (PTB) are often linked to Siberian Traps Large Igneous Province (STLIP) volcanism and mass extinction (PTBME). However, mounting evidence indicates that relation between STLIP Hg “anomalies” is not straightforward. This study focuses on timing provenance of volcanic fluxes around PTBME in South China. We constrain carbon isotope ( δ 13 C) concentration records by utilizing high‐precision U‐Pb zircon ages from two expanded deep‐water marine sections spanning Late Permian Early Triassic Nanpanjiang Basin. Results reveal episodes enrichment. The oldest episode predates onset a large negative C excursion, which documented be older than 252.07 ± 0.130 Ma. second occurred 251.822 0.060 251.589 0.062 Ma, coinciding with nadir excursion. Volcanic ash geochemistry compositions suggest was mainly sourced subduction‐related arc magmatism Tethys region, peaked 251.668 0.079 0.052 These results compatible suggestions regional contributed causes China provide anomalies close PTB reliable stratigraphic marker for event. demonstrates relations volcanism, environmental perturbations during transition better resolved aid ages.
Language: Английский
Citations
6
Gondwana Research, Journal Year: 2024, Volume and Issue: 133, P. 335 - 347
Published: July 2, 2024
Eight new high-precision 206Pb/238U CA-IDTIMS ages from the Bowen Basin are integrated with previous to further calibration of Lopingian sequences that record a period climatic change, extensive volcanism and mass extinction. Numerous tuffs occur within late Permian as basin develops shifts towards increasingly terrestrial sedimentation coal measures which series super-eruptions spanning c. 2.5 million years between ∼254 252 Ma. One, Yarrabee Tuff, represents basin-wide event has been used correlative surface, previously dated at number locations 252.88 ± 0.07 These correspond Eastern Australia magmatic arc flare-up peaking 253 A age is reported (upper) Black Alley Shale, 257.8 1.2 Ma (upper Alley). The Wuchiapingian-Changhsingian Boundary in lower Shale. Shale/Peawaddy boundary marked by Micrhystridium evansii Acritarch Acme Zone "Mantuan Productus Beds" here 254.5 (latest Wuchiapingian). This level may also mark termination P4 glaciation Late Paleozoic Ice Age. Our Fort Cooper Coal 256.0 1.4 consistent Peawaddy Tinowan formations. Platypus 256.58 0.73 Ma, another marker mid-Wuchiapingian major super-volcanic event. top Ingelara Formation our 257.33 0.52 Protohaploxypinus microcorpus Playfordiaspora crenulata palynozones Changhsingian age. Permian-Triassic placed Rewan Group Lunatisporites pellucidus Zone.
Language: Английский
Citations
1
Communications Earth & Environment, Journal Year: 2024, Volume and Issue: 5(1)
Published: April 24, 2024
Abstract Expansion of oceanic anoxia is a prevailing hypothesis for driving the marine end-Permian mass extinction and mainly based on isotopic geochemical proxies. However, long-term redox conditions before remain unresolved. Here we report secular trend rock magnetic experiments cerium anomalies through Changhsingian across Permian-Triassic boundary at Meishan section, China. Magnetic mineral assemblages changed dramatically ca. 252.8 million years age (Ma), which indicates that deoxygenation started about 0.9 earlier than extinction. The magnetite-dominant post interval suggests ferruginous dysoxic with enhanced weathering in earliest Triassic. Also, gradual magnetite abundance decrease to pre-extinction levels observed 251.5 Ma, coinciding temporally waning Siberian Trap arc volcanism. All these observations demonstrate environmental deterioration began much finally collapsed end-Permian.
Language: Английский
Citations
1
Geochronology, Journal Year: 2023, Volume and Issue: 5(1), P. 1 - 19
Published: Jan. 11, 2023
Abstract. Estimations of the reproducibility U–Pb ages from SHRIMP (Sensitive High-Resolution Ion MicroProbe) instruments are based on data studies that nearly 2 decades old. Since time, refinement analytical procedures and operational improvements have reduced historically identified uncertainties analysis. This paper investigates 36 thermal ionisation mass spectrometry (TIMS) double-dated “real-world” geologic samples a variety igneous rock types to better understand both geological sources disagreement between two dating methods. Geoscience Australia's (GA) use high-precision chemical abrasion (CA-TIMS) for chronostratigraphy in Australian sedimentary basins has produced substantial selection precisely dated zircons, which we can cross-correlate CA-TIMS throughout Phanerozoic. A total 33 were reported with external less than 1 % (95 confidence). Six eight cases where age was outside uncertainty envelope 95 confidence interval below 0.66 uncertainty, suggesting analyses untreated zircon smaller probably overoptimistic. The mean offset TIMS is 0.095 %, but distribution appears bimodal. Geological explanations discrepancies suggested by considering intrusive extrusive results separately. All one sample more 0.25 older volcanic. could be explained single-grain resolution TIMS, allowing identification exclusion antecrysts eruptive population, while does not sufficient precision deconvolve these populations – leading an apparent age. In contrast, plutonic rocks particularly early Paleozoic typically younger same samples, most likely reflecting Pb loss non-chemically abraded zircons prior analysis destroyed or corrected areas loss.
Language: Английский
Citations
3
Geological Journal, Journal Year: 2023, Volume and Issue: 58(10), P. 3879 - 3898
Published: June 13, 2023
The largely stagnant marine ecosystem following the Permian–Triassic mass extinction (PTME) was superseded by appearance of reptiles. One most abundant Early Triassic (Spathian) reptile faunas occurs in Nanzhang‐Yuan'an area Hubei Province, South China, and provides remarkable information for understanding biotic recovery after PTME. Situated on north edge Middle Yangtze Platform well‐exposed Zhangjiawan stratigraphic succession Yuan'an County represents one productive sections, yielding Intensive sampling this section reveals a unique conodont community both before during emergence Fauna (NYF). Occurrences Neostrachanognathus tahoensis below NYF deposition ʻGreen Bean Rock (GBR)ʼ above restricted fauna to latest Triassic. Except coniform , consists Ellisoniidae characterized ramiform P 1 elements. Foraminifers fish found together with elements form other low‐level parts local food web. Other temporally coincident sections nearby, example, Yanduhe western yield only rare conodonts. Hence, from suggests that might be “refuge area” ecosystem, or at least reptiles communities. Although direct connection between conodonts is still uncertain, consumers—conodont animals‐played important roles webs NYF. collision China North blocks removed witnessed disappearance endemic Hupeisuchians.
Language: Английский
Citations
3
Journal of Volcanology and Geothermal Research, Journal Year: 2024, Volume and Issue: 449, P. 108073 - 108073
Published: April 10, 2024
Language: Английский
Citations
0
Global and Planetary Change, Journal Year: 2024, Volume and Issue: 240, P. 104534 - 104534
Published: July 29, 2024
Language: Английский
Citations
0