Onset of the Mulde Biogeochemical Event in the Midcontinent Basin (Silurian, USA)

IF 2.7 2区地球科学 Q2 GEOGRAPHY, PHYSICAL

Palaeogeography, Palaeoclimatology, Palaeoecology Pub Date : 2025-06-16 DOI:10.1016/j.palaeo.2025.113096

C. Klock , P.I. McLaughlin , T. Paton , A.M. Bancroft , G. Cane , T.R.A. Vandenbroucke , P. Emsbo

{"title":"Onset of the Mulde Biogeochemical Event in the Midcontinent Basin (Silurian, USA)","authors":"C. Klock , P.I. McLaughlin , T. Paton , A.M. Bancroft , G. Cane , T.R.A. Vandenbroucke , P. Emsbo","doi":"10.1016/j.palaeo.2025.113096","DOIUrl":null,"url":null,"abstract":"<div><div>The mid-Silurian (Homerian) Mulde Biogeochemical Event has one of the most highly refined chronologies in the Paleozoic. The turnover of marine benthic and pelagic faunas and floras that defines the biotic component of the event is associated with the initial rise of a double-peaked positive carbonate carbon (δ<sup>13</sup>C<sub>carb</sub>) isotope excursion. Five previously published U<img>Pb ages constrain the duration of the first peak of the δ<sup>13</sup>C<sub>carb</sub> excursion, which reaches values of up to +5.5 ‰, to as little as a few hundred thousand years. Establishing a robust process understanding of this biogeochemical event requires seamless integration of these high-precision U<img>Pb ages with intercontinental chronostratigraphic correlation to temporally compile the records of environmental change while parsing local from global drivers. Our new bio- and chemostratigraphic data from the Midcontinent Basin (USA) fine-tune the chronostratigraphic framework through the onset of the Mulde Event and refine intercontinental comparison with the gold-standard sections of Gotland (Sweden).</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"675 ","pages":"Article 113096"},"PeriodicalIF":2.7000,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Palaeogeography, Palaeoclimatology, Palaeoecology","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0031018225003815","RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"GEOGRAPHY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

The mid-Silurian (Homerian) Mulde Biogeochemical Event has one of the most highly refined chronologies in the Paleozoic. The turnover of marine benthic and pelagic faunas and floras that defines the biotic component of the event is associated with the initial rise of a double-peaked positive carbonate carbon (δ¹³C_carb) isotope excursion. Five previously published UPb ages constrain the duration of the first peak of the δ¹³C_carb excursion, which reaches values of up to +5.5 ‰, to as little as a few hundred thousand years. Establishing a robust process understanding of this biogeochemical event requires seamless integration of these high-precision UPb ages with intercontinental chronostratigraphic correlation to temporally compile the records of environmental change while parsing local from global drivers. Our new bio- and chemostratigraphic data from the Midcontinent Basin (USA) fine-tune the chronostratigraphic framework through the onset of the Mulde Event and refine intercontinental comparison with the gold-standard sections of Gotland (Sweden).

查看原文本刊更多论文

中陆盆地（美国志留系）Mulde生物地球化学事件的开始

中志留纪（荷马纪）莫尔德生物地球化学事件是古生代最精细的年代学事件之一。确定该事件生物成分的海洋底栖生物和远洋动植物的更替与双峰正碳酸盐碳（δ13Ccarb）同位素偏移的初始上升有关。先前公布的5个UPb年龄限制了δ13Ccarb偏移的第一个峰值的持续时间，其值可达+5.5‰，最小可达几十万年。要建立对这一生物地球化学事件的强有力的过程理解，需要将这些高精度UPb年龄与洲际年代地层对比无缝整合，以便在分析本地和全球驱动因素的同时，汇编环境变化的时间记录。我们从中大陆盆地（美国）获得的新的生物和化学地层学数据通过Mulde事件的开始对年代地层格架进行了微调，并与瑞典哥特兰岛的黄金标准剖面进行了洲际比较。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Palaeogeography, Palaeoclimatology, Palaeoecology 地学-地球科学综合

CiteScore

5.90

自引率

10.00%

发文量

398

审稿时长

3.8 months

期刊介绍： Palaeogeography, Palaeoclimatology, Palaeoecology is an international medium for the publication of high quality and multidisciplinary, original studies and comprehensive reviews in the field of palaeo-environmental geology. The journal aims at bringing together data with global implications from research in the many different disciplines involved in palaeo-environmental investigations. By cutting across the boundaries of established sciences, it provides an interdisciplinary forum where issues of general interest can be discussed.