U-Pb zircon geochronology and Nd-Hf-O isotopic systematics of the Neoproterozoic Hadb adh Dayheen ring complex, Central Arabian Shield, Saudi Arabia

Kamal A. Ali; Heejin Jeon; Arild Andresen; Shuang Qing Li; Hesham M. Harbi; Ernst Hegner

doi:10.1016/j.lithos.2014.07.030

U-Pb zircon geochronology and Nd-Hf-O isotopic systematics of the Neoproterozoic Hadb adh Dayheen ring complex, Central Arabian Shield, Saudi Arabia

Kamal A. Ali, Heejin Jeon, Arild Andresen, Shuang Qing Li, Hesham M. Harbi, Ernst Hegner

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

29 Citations (Scopus)

Abstract

A combined study of single zircon U-Pb dating, Hf-O zircon isotopic analyses and whole-rock Nd isotopic compositions was carried out to infer the magma sources of Neoproterozoic post-collisional A-type granitoids in Saudi Arabia. U-Pb zircon dating of magmatic zircons of two samples from the Hadb adh Dayheen ring complex yielded ages of 625±11Ma for a hornblende-biotite granite sample, and 613±4Ma for a monzogranite sample. The granitic rocks show initial ε_Nd values of +4.1 to +5.3 and ε_Hf of +4.5 to +8.4 that are lower than those of a model depleted mantle (ε_Hf ~+14 and ε_Nd ~+6.5) and consistent with melting of subduction-related crustal protoliths that were formed during the Neoproterozoic assembly of the Arabian-Nubian Shield (ANS). Crustal-model ages (Hf-t_NC) of 0.81 to 1.1Ga are inconsistent with depleted-mantle Nd model ages of 0.71 to 0.81Ga and indicate that the post-collisional Hadb adh Dayheen granites were derived mostly from juvenile crust formed in Neoproterozoic time. Single zircons data show a wide range in δ¹⁸O values from +3.2‰ to +6.4‰, possibly indicating crystallization of zircon from magma derived from magmatic rocks altered by meteoric water in a magma chamber-caldera system.

Original language	English
Pages (from-to)	348-360
Number of pages	13
Journal	Lithos
Volume	206-207
Issue number	1
DOIs	https://doi.org/10.1016/j.lithos.2014.07.030
Publication status	Published - Oct 2014
Externally published	Yes

Keywords

A-type granites
Arabian-Nubian Shield
Single zircon Hf-O isotopes
Sm-Nd isotopes
U-Pb zircon dating

ASJC Scopus subject areas

Geology
Geochemistry and Petrology

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10.1016/j.lithos.2014.07.030

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@article{49b78c6d16cb4bf48f8e54d99f1aabe6,

title = "U-Pb zircon geochronology and Nd-Hf-O isotopic systematics of the Neoproterozoic Hadb adh Dayheen ring complex, Central Arabian Shield, Saudi Arabia",

abstract = "A combined study of single zircon U-Pb dating, Hf-O zircon isotopic analyses and whole-rock Nd isotopic compositions was carried out to infer the magma sources of Neoproterozoic post-collisional A-type granitoids in Saudi Arabia. U-Pb zircon dating of magmatic zircons of two samples from the Hadb adh Dayheen ring complex yielded ages of 625±11Ma for a hornblende-biotite granite sample, and 613±4Ma for a monzogranite sample. The granitic rocks show initial εNd values of +4.1 to +5.3 and εHf of +4.5 to +8.4 that are lower than those of a model depleted mantle (εHf ~+14 and εNd ~+6.5) and consistent with melting of subduction-related crustal protoliths that were formed during the Neoproterozoic assembly of the Arabian-Nubian Shield (ANS). Crustal-model ages (Hf-tNC) of 0.81 to 1.1Ga are inconsistent with depleted-mantle Nd model ages of 0.71 to 0.81Ga and indicate that the post-collisional Hadb adh Dayheen granites were derived mostly from juvenile crust formed in Neoproterozoic time. Single zircons data show a wide range in δ18O values from +3.2‰ to +6.4‰, possibly indicating crystallization of zircon from magma derived from magmatic rocks altered by meteoric water in a magma chamber-caldera system.",

keywords = "A-type granites, Arabian-Nubian Shield, Single zircon Hf-O isotopes, Sm-Nd isotopes, U-Pb zircon dating",

author = "Ali, {Kamal A.} and Heejin Jeon and Arild Andresen and Li, {Shuang Qing} and Harbi, {Hesham M.} and Ernst Hegner",

note = "Funding Information: The authors would like to thank the Geosciences Department at University of Oslo (Norway) for performing zircon Hf-isotope analyses. We sincerely thank Swedish Museum of Natural History for analyzing U–Pb and O isotope. The NordSIM ion microprobe facility is financed and operated under an agreement between the research councils of Denmark, Sweden, and the Geological Survey of Finland and the Swedish Museum of Natural History. We are grateful to Dr. Cosmas Shang, an anonymous reviewer and Editor-in-Chief Prof. Nelson Eby for critical reviews that improved this manuscript. This is Nordsim contribution 379. ",

year = "2014",

month = oct,

doi = "10.1016/j.lithos.2014.07.030",

language = "English",

volume = "206-207",

pages = "348--360",

journal = "Lithos",

issn = "0024-4937",

publisher = "Elsevier",

number = "1",

}

TY - JOUR

T1 - U-Pb zircon geochronology and Nd-Hf-O isotopic systematics of the Neoproterozoic Hadb adh Dayheen ring complex, Central Arabian Shield, Saudi Arabia

AU - Ali, Kamal A.

AU - Jeon, Heejin

AU - Andresen, Arild

AU - Li, Shuang Qing

AU - Harbi, Hesham M.

AU - Hegner, Ernst

N1 - Funding Information: The authors would like to thank the Geosciences Department at University of Oslo (Norway) for performing zircon Hf-isotope analyses. We sincerely thank Swedish Museum of Natural History for analyzing U–Pb and O isotope. The NordSIM ion microprobe facility is financed and operated under an agreement between the research councils of Denmark, Sweden, and the Geological Survey of Finland and the Swedish Museum of Natural History. We are grateful to Dr. Cosmas Shang, an anonymous reviewer and Editor-in-Chief Prof. Nelson Eby for critical reviews that improved this manuscript. This is Nordsim contribution 379.

PY - 2014/10

Y1 - 2014/10

N2 - A combined study of single zircon U-Pb dating, Hf-O zircon isotopic analyses and whole-rock Nd isotopic compositions was carried out to infer the magma sources of Neoproterozoic post-collisional A-type granitoids in Saudi Arabia. U-Pb zircon dating of magmatic zircons of two samples from the Hadb adh Dayheen ring complex yielded ages of 625±11Ma for a hornblende-biotite granite sample, and 613±4Ma for a monzogranite sample. The granitic rocks show initial εNd values of +4.1 to +5.3 and εHf of +4.5 to +8.4 that are lower than those of a model depleted mantle (εHf ~+14 and εNd ~+6.5) and consistent with melting of subduction-related crustal protoliths that were formed during the Neoproterozoic assembly of the Arabian-Nubian Shield (ANS). Crustal-model ages (Hf-tNC) of 0.81 to 1.1Ga are inconsistent with depleted-mantle Nd model ages of 0.71 to 0.81Ga and indicate that the post-collisional Hadb adh Dayheen granites were derived mostly from juvenile crust formed in Neoproterozoic time. Single zircons data show a wide range in δ18O values from +3.2‰ to +6.4‰, possibly indicating crystallization of zircon from magma derived from magmatic rocks altered by meteoric water in a magma chamber-caldera system.

AB - A combined study of single zircon U-Pb dating, Hf-O zircon isotopic analyses and whole-rock Nd isotopic compositions was carried out to infer the magma sources of Neoproterozoic post-collisional A-type granitoids in Saudi Arabia. U-Pb zircon dating of magmatic zircons of two samples from the Hadb adh Dayheen ring complex yielded ages of 625±11Ma for a hornblende-biotite granite sample, and 613±4Ma for a monzogranite sample. The granitic rocks show initial εNd values of +4.1 to +5.3 and εHf of +4.5 to +8.4 that are lower than those of a model depleted mantle (εHf ~+14 and εNd ~+6.5) and consistent with melting of subduction-related crustal protoliths that were formed during the Neoproterozoic assembly of the Arabian-Nubian Shield (ANS). Crustal-model ages (Hf-tNC) of 0.81 to 1.1Ga are inconsistent with depleted-mantle Nd model ages of 0.71 to 0.81Ga and indicate that the post-collisional Hadb adh Dayheen granites were derived mostly from juvenile crust formed in Neoproterozoic time. Single zircons data show a wide range in δ18O values from +3.2‰ to +6.4‰, possibly indicating crystallization of zircon from magma derived from magmatic rocks altered by meteoric water in a magma chamber-caldera system.

KW - A-type granites

KW - Arabian-Nubian Shield

KW - Single zircon Hf-O isotopes

KW - Sm-Nd isotopes

KW - U-Pb zircon dating

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U2 - 10.1016/j.lithos.2014.07.030

DO - 10.1016/j.lithos.2014.07.030

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SN - 0024-4937

VL - 206-207

SP - 348

EP - 360

JO - Lithos

JF - Lithos

IS - 1

ER -

U-Pb zircon geochronology and Nd-Hf-O isotopic systematics of the Neoproterozoic Hadb adh Dayheen ring complex, Central Arabian Shield, Saudi Arabia

Abstract

Keywords

ASJC Scopus subject areas

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