A Middle-Late Ediacaran Volcano-Sedimentary Record from the Eastern Arabian-Nubian Shield

David Nettle; Galen P. Halverson; Grant M. Cox; Alan S. Collins; Mark Schmitz; James Gehling; Peter R. Johnson; Khalid Kadi

doi:10.1111/ter.12077

A Middle-Late Ediacaran Volcano-Sedimentary Record from the Eastern Arabian-Nubian Shield

David Nettle, Galen P. Halverson, Grant M. Cox, Alan S. Collins, Mark Schmitz, James Gehling, Peter R. Johnson, Khalid Kadi

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

The Ediacaran Jibalah Group comprises volcano-sedimentary successions that filled small fault-bound basins along the NW–SE-trending Najd fault system in the eastern Arabian-Nubian Shield. Like several other Jibalah basins, the Antaq basin contains exquisitely preserved sedimentary structures and felsic tuffs, and hence is an excellent candidate for calibrating late Ediacaran Earth history. Shallow-marine strata from the upper Jibalah Group (Muraykhah Formation) contain a diversity of load structures and intimately related textured organic (microbial) surfaces, along with a fragment of a structure closely resembling an Ediacaran frond fossil and a possible specimen of Aspidella . Interspersed carbonate beds through the Muraykhah Formation record a positive δ ¹³ C shift from −6 to 0‰. U-Pb zircon geochronology indicates a maximum depositional age of ~570 Ma for the upper Jibalah Group, consistent with previous age estimates. Although this age overlaps with that of the upper Huqf Supergroup in nearby Oman, these sequences were deposited in contrasting tectonic settings on opposite sides of the final suture of the East African Orogen.

Original language	American English
Pages (from-to)	120-129
Number of pages	10
Journal	Terra Nova
Volume	26
Issue number	2
DOIs	https://doi.org/10.1111/ter.12077
State	Published - Apr 2014

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Geophysics and Seismology

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title = "A Middle-Late Ediacaran Volcano-Sedimentary Record from the Eastern Arabian-Nubian Shield",

abstract = " The Ediacaran Jibalah Group comprises volcano-sedimentary successions that filled small fault-bound basins along the NW–SE-trending Najd fault system in the eastern Arabian-Nubian Shield. Like several other Jibalah basins, the Antaq basin contains exquisitely preserved sedimentary structures and felsic tuffs, and hence is an excellent candidate for calibrating late Ediacaran Earth history. Shallow-marine strata from the upper Jibalah Group (Muraykhah Formation) contain a diversity of load structures and intimately related textured organic (microbial) surfaces, along with a fragment of a structure closely resembling an Ediacaran frond fossil and a possible specimen of Aspidella . Interspersed carbonate beds through the Muraykhah Formation record a positive δ 13 C shift from −6 to 0‰. U-Pb zircon geochronology indicates a maximum depositional age of ~570 Ma for the upper Jibalah Group, consistent with previous age estimates. Although this age overlaps with that of the upper Huqf Supergroup in nearby Oman, these sequences were deposited in contrasting tectonic settings on opposite sides of the final suture of the East African Orogen.",

author = "David Nettle and Halverson, {Galen P.} and Cox, {Grant M.} and Collins, {Alan S.} and Mark Schmitz and James Gehling and Johnson, {Peter R.} and Khalid Kadi",

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T1 - A Middle-Late Ediacaran Volcano-Sedimentary Record from the Eastern Arabian-Nubian Shield

AU - Nettle, David

AU - Halverson, Galen P.

AU - Cox, Grant M.

AU - Collins, Alan S.

AU - Schmitz, Mark

AU - Gehling, James

AU - Johnson, Peter R.

AU - Kadi, Khalid

PY - 2014/4

Y1 - 2014/4

N2 - The Ediacaran Jibalah Group comprises volcano-sedimentary successions that filled small fault-bound basins along the NW–SE-trending Najd fault system in the eastern Arabian-Nubian Shield. Like several other Jibalah basins, the Antaq basin contains exquisitely preserved sedimentary structures and felsic tuffs, and hence is an excellent candidate for calibrating late Ediacaran Earth history. Shallow-marine strata from the upper Jibalah Group (Muraykhah Formation) contain a diversity of load structures and intimately related textured organic (microbial) surfaces, along with a fragment of a structure closely resembling an Ediacaran frond fossil and a possible specimen of Aspidella . Interspersed carbonate beds through the Muraykhah Formation record a positive δ 13 C shift from −6 to 0‰. U-Pb zircon geochronology indicates a maximum depositional age of ~570 Ma for the upper Jibalah Group, consistent with previous age estimates. Although this age overlaps with that of the upper Huqf Supergroup in nearby Oman, these sequences were deposited in contrasting tectonic settings on opposite sides of the final suture of the East African Orogen.

AB - The Ediacaran Jibalah Group comprises volcano-sedimentary successions that filled small fault-bound basins along the NW–SE-trending Najd fault system in the eastern Arabian-Nubian Shield. Like several other Jibalah basins, the Antaq basin contains exquisitely preserved sedimentary structures and felsic tuffs, and hence is an excellent candidate for calibrating late Ediacaran Earth history. Shallow-marine strata from the upper Jibalah Group (Muraykhah Formation) contain a diversity of load structures and intimately related textured organic (microbial) surfaces, along with a fragment of a structure closely resembling an Ediacaran frond fossil and a possible specimen of Aspidella . Interspersed carbonate beds through the Muraykhah Formation record a positive δ 13 C shift from −6 to 0‰. U-Pb zircon geochronology indicates a maximum depositional age of ~570 Ma for the upper Jibalah Group, consistent with previous age estimates. Although this age overlaps with that of the upper Huqf Supergroup in nearby Oman, these sequences were deposited in contrasting tectonic settings on opposite sides of the final suture of the East African Orogen.

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UR - https://scholarworks.boisestate.edu/geo_facpubs/192

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JO - Terra Nova

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ER -

A Middle-Late Ediacaran Volcano-Sedimentary Record from the Eastern Arabian-Nubian Shield

Abstract

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UN SDGs

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