40Ar/39Ar dating of exceptional concentration of metals by weathering of Precambrian rocks at the Precambrian–Cambrian boundary

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Standard

40Ar/39Ar dating of exceptional concentration of metals by weathering of Precambrian rocks at the Precambrian–Cambrian boundary. / Parnell, John; Mark, Darren F.; Frei, Robert; Fallick, Anthony E.; Ellam, Rob M.

I: Precambrian Research, Bind 246, 06.2014, s. 54-63.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt

Harvard

Parnell, J, Mark, DF, Frei, R, Fallick, AE & Ellam, RM 2014, '40Ar/39Ar dating of exceptional concentration of metals by weathering of Precambrian rocks at the Precambrian–Cambrian boundary', Precambrian Research, bind 246, s. 54-63. https://doi.org/10.1016/j.precamres.2014.02.012

APA

Parnell, J., Mark, D. F., Frei, R., Fallick, A. E., & Ellam, R. M. (2014). 40Ar/39Ar dating of exceptional concentration of metals by weathering of Precambrian rocks at the Precambrian–Cambrian boundary. Precambrian Research, 246, 54-63. https://doi.org/10.1016/j.precamres.2014.02.012

Vancouver

Parnell J, Mark DF, Frei R, Fallick AE, Ellam RM. 40Ar/39Ar dating of exceptional concentration of metals by weathering of Precambrian rocks at the Precambrian–Cambrian boundary. Precambrian Research. 2014 jun.;246:54-63. https://doi.org/10.1016/j.precamres.2014.02.012

Author

Parnell, John ; Mark, Darren F. ; Frei, Robert ; Fallick, Anthony E. ; Ellam, Rob M. / 40Ar/39Ar dating of exceptional concentration of metals by weathering of Precambrian rocks at the Precambrian–Cambrian boundary. I: Precambrian Research. 2014 ; Bind 246. s. 54-63.

Bibtex

@article{9fb9809de04542e894d1069be7307fd4,
title = "40Ar/39Ar dating of exceptional concentration of metals by weathering of Precambrian rocks at the Precambrian–Cambrian boundary",
abstract = "The sub-Cambrian surface, including diverse metalliferous deposits, shows evidence of intense weathering of Precambrian rocks to form supergene-enriched ores and metalliferous placers, followed by widespread peneplanation. Much of the metal would have been flushed to the Cambrian ocean during peneplanation. An 40Ar/39Ar age of 542.62 ± 0.38 Ma (1 sigma, full external precision, Renne et al., 2011) for metalliferous alteration clays in Scotland shows that this event occurred immediately prior to the Precambrian–Cambrian boundary. A negative δ53Cr isotopic signature for the clay is consistent with mobilization on land of redox sensitive metals by oxidative terrestrial weathering. This unprecedented flushing of metals from the weathered Precambrian surface would have contributed to the chemistry of the earliest Cambrian ocean at a time of marked faunal evolution.",
author = "John Parnell and Mark, {Darren F.} and Robert Frei and Fallick, {Anthony E.} and Ellam, {Rob M.}",
year = "2014",
month = jun,
doi = "10.1016/j.precamres.2014.02.012",
language = "English",
volume = "246",
pages = "54--63",
journal = "Precambrian Research",
issn = "0301-9268",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - 40Ar/39Ar dating of exceptional concentration of metals by weathering of Precambrian rocks at the Precambrian–Cambrian boundary

AU - Parnell, John

AU - Mark, Darren F.

AU - Frei, Robert

AU - Fallick, Anthony E.

AU - Ellam, Rob M.

PY - 2014/6

Y1 - 2014/6

N2 - The sub-Cambrian surface, including diverse metalliferous deposits, shows evidence of intense weathering of Precambrian rocks to form supergene-enriched ores and metalliferous placers, followed by widespread peneplanation. Much of the metal would have been flushed to the Cambrian ocean during peneplanation. An 40Ar/39Ar age of 542.62 ± 0.38 Ma (1 sigma, full external precision, Renne et al., 2011) for metalliferous alteration clays in Scotland shows that this event occurred immediately prior to the Precambrian–Cambrian boundary. A negative δ53Cr isotopic signature for the clay is consistent with mobilization on land of redox sensitive metals by oxidative terrestrial weathering. This unprecedented flushing of metals from the weathered Precambrian surface would have contributed to the chemistry of the earliest Cambrian ocean at a time of marked faunal evolution.

AB - The sub-Cambrian surface, including diverse metalliferous deposits, shows evidence of intense weathering of Precambrian rocks to form supergene-enriched ores and metalliferous placers, followed by widespread peneplanation. Much of the metal would have been flushed to the Cambrian ocean during peneplanation. An 40Ar/39Ar age of 542.62 ± 0.38 Ma (1 sigma, full external precision, Renne et al., 2011) for metalliferous alteration clays in Scotland shows that this event occurred immediately prior to the Precambrian–Cambrian boundary. A negative δ53Cr isotopic signature for the clay is consistent with mobilization on land of redox sensitive metals by oxidative terrestrial weathering. This unprecedented flushing of metals from the weathered Precambrian surface would have contributed to the chemistry of the earliest Cambrian ocean at a time of marked faunal evolution.

U2 - 10.1016/j.precamres.2014.02.012

DO - 10.1016/j.precamres.2014.02.012

M3 - Journal article

VL - 246

SP - 54

EP - 63

JO - Precambrian Research

JF - Precambrian Research

SN - 0301-9268

ER -

ID: 130358786