气候变化领域集成服务门户(CCPortal): Linked Silurian carbon cycle perturbations; bursts of pinnacle reef growth; extreme sea-level oscillations; and evaporite deposition (Michigan Basin; USA)

CCPortal

DOI	10.1016/j.palaeo.2020.109806
	Linked Silurian carbon cycle perturbations; bursts of pinnacle reef growth; extreme sea-level oscillations; and evaporite deposition (Michigan Basin; USA)
	Rine M.J.; McLaughlin P.I.; Bancroft A.M.; Harrison W.B.; III; Kuglitsch J.; Caruthers A.H.; Ramezani J.; Kaczmarek S.E.; Emsbo P.
发表日期	2020
ISSN	0031-0182
卷号	554
英文摘要	Integration of sedimentologic, chemostratigraphic, biostratigraphic, and geochronologic data identifies the profound influence that sudden bursts of carbonate sedimentation, sea-level oscillation, and hypersalinity, associated with Ireviken and Mulde carbon cycle perturbations, had on the evolution of the Michigan Basin during the Silurian. Conodonts and carbon isotope (δ13Ccarb) stratigraphy of the Lockport and Engadine Dolomites constrain the rapid build-up and progradation of a thick biohermal wedge along the basin margins to the Sheinwoodian-age Ireviken Excursion, a recently identified period of global reef growth. This event significantly changed the hydrologic architecture of the basin, ultimately resulting in restricted seawater exchange that drove evaporite deposition. Zircon U[sbnd]Pb ages of ~428 Ma from bentonites near the base of the evaporite-bearing Salina Group, together with δ13Ccarb profiles transecting the basin, constrain the onset of hypersalinity to initiation of the late Homerian Mulde Excursion. Importantly, the double δ13Ccarb peak of this event parallels a complex pattern of dramatic sea-level oscillations, on the order of 100 m, recorded within the A-0 to A-2 evaporites and associated pinnacle reefs. Ascending δ13Ccarb values were accompanied by sea-level fall, karstification, and the formation of evaporites in the basin center. Intra-excursion sea-level rebounds triggered exceptionally rapid upward pinnacle reef growth. Subsequent sea-level fall again exposed the ramp and pinnacle reefs resulting in basin-wide restriction and massive salt deposition that, ultimately, encased the reefs in salt. The return to baseline δ13Ccarb values was accompanied by flooding and carbonate sedimentation. Our integrated approach, with high-resolution δ13Ccarb stratigraphy from closely spaced (intra-basinal) sections as a central component, enables finely tuned chronostratigraphic correlation, recognition of unconformity-bound facies packages (i.e., systems tracts), and constrains variations in sea level and sedimentation rates. These findings have immediate applications to predictive static reservoir models for the evaluation of the reefs as repositories for anthropogenic CO2 sequestration, gas storage reservoirs, and hydrocarbon exploration. Ultimately, our findings demonstrate that a cascade of rapid environmental changes, including pulses of carbonate sedimentation, high-amplitude sea-level oscillations, and evaporite deposition, were associated with the Ireviken and Mulde perturbations of the Silurian carbon cycle. © 2020 Elsevier B.V.
英文关键词	Carbon isotope chemostratigraphy; Ireviken Excursion; Mulde Excursion; Sequence stratigraphy; U–Pb zircon geochronology; Wenlock
语种	英语
scopus关键词	bentonite; biostratigraphy; carbon cycle; carbon isotope; carbonate; chemostratigraphy; conodont; dolomite; environmental change; evaporite; geochronology; growth rate; salinity; sea level; sedimentology; Silurian; uranium-lead dating; Michigan Basin; Homeria
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150427
作者单位	Department of Geological and Environmental Sciences, Western Michigan University, 1903 W Michigan Ave, Kalamazoo, MI, United States; Indiana Geological and Water Survey, Indiana University, 611 North Walnut Grove Ave, Bloomington, IN, United States; Department of Earth Science, North Carolina Wesleyan College, 3400 North Wesleyan Blvd, Rocky Mount, NC, United States; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Ave., MIT Bldg. 54-117, Cambridge, MA, United States; U.S. Geological Survey, MS 973, Box 25046, Denver, CO, United States
推荐引用方式 GB/T 7714	Rine M.J.,McLaughlin P.I.,Bancroft A.M.,et al. Linked Silurian carbon cycle perturbations; bursts of pinnacle reef growth; extreme sea-level oscillations; and evaporite deposition (Michigan Basin; USA)[J],2020,554.
APA	Rine M.J..,McLaughlin P.I..,Bancroft A.M..,Harrison W.B..,III.,...&Emsbo P..(2020).Linked Silurian carbon cycle perturbations; bursts of pinnacle reef growth; extreme sea-level oscillations; and evaporite deposition (Michigan Basin; USA).Palaeogeography, Palaeoclimatology, Palaeoecology,554.
MLA	Rine M.J.,et al."Linked Silurian carbon cycle perturbations; bursts of pinnacle reef growth; extreme sea-level oscillations; and evaporite deposition (Michigan Basin; USA)".Palaeogeography, Palaeoclimatology, Palaeoecology 554(2020).