Discovery of a Neoproterozoic granite in the Northern Alxa region, NW China: its age, petrogenesis and tectonic significance

Wen Zhang; Victoria Pease; Qingpeng Meng; Rongguo Zheng; Tonny B. Thomsen; Cora Wohlgemuth-Ueberwasser; Tairan Wu

doi:10.1017/S0016756815000631

Discovery of a Neoproterozoic granite in the Northern Alxa region, NW China: its age, petrogenesis and tectonic significance

Wen Zhang, Victoria Pease, Qingpeng Meng, Rongguo Zheng, Tonny B. Thomsen, Cora Wohlgemuth-Ueberwasser, Tairan Wu

Department of Mapping and Mineral Resources

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

36 Citations (Scopus)

Abstract

A Neoproterozoic granite (Western Huhetaoergai granite) from the Northern Alxa region, southern Central Asia Orogenic Belt (CAOB) is first recognized by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) U-Pb zircon dating (889±8 Ma). It is a highly fractionated potassium-rich calc-alkaline pluton with low ' Nd(t) (-2.6 to -1.1) and high (⁸⁷Sr/⁸⁶Sr) t (0.727305-0.735626), and is probably derived from a mantle source and assimilated crustal rocks with very high ⁸⁷Sr/⁸⁶Sr. Regional geology implies that it may reflect the existence of a microcontinent, and the formation of the Western Huhetaoergai granite is related to the assembly of Rodinia.

Original language	English
Pages (from-to)	512-523
Number of pages	12
Journal	Geological Magazine
Volume	153
Issue number	3
DOIs	https://doi.org/10.1017/S0016756815000631
Publication status	Published - 1 May 2016

Keywords

Alxa
CAOB
granite
Neoproterozoic
zircon U-Pb dating

Programme Area

Programme Area 4: Mineral Resources

Access to Document

10.1017/S0016756815000631

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title = "Discovery of a Neoproterozoic granite in the Northern Alxa region, NW China: its age, petrogenesis and tectonic significance",

abstract = "A Neoproterozoic granite (Western Huhetaoergai granite) from the Northern Alxa region, southern Central Asia Orogenic Belt (CAOB) is first recognized by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) U-Pb zircon dating (889±8 Ma). It is a highly fractionated potassium-rich calc-alkaline pluton with low ' Nd(t) (-2.6 to -1.1) and high (87Sr/86Sr) t (0.727305-0.735626), and is probably derived from a mantle source and assimilated crustal rocks with very high 87Sr/86Sr. Regional geology implies that it may reflect the existence of a microcontinent, and the formation of the Western Huhetaoergai granite is related to the assembly of Rodinia. ",

keywords = "Alxa, CAOB, granite, Neoproterozoic, zircon U-Pb dating",

author = "Wen Zhang and Victoria Pease and Qingpeng Meng and Rongguo Zheng and Thomsen, {Tonny B.} and Cora Wohlgemuth-Ueberwasser and Tairan Wu",

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doi = "10.1017/S0016756815000631",

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T2 - its age, petrogenesis and tectonic significance

AU - Zhang, Wen

AU - Pease, Victoria

AU - Meng, Qingpeng

AU - Zheng, Rongguo

AU - Thomsen, Tonny B.

AU - Wohlgemuth-Ueberwasser, Cora

AU - Wu, Tairan

N1 - Publisher Copyright: © Cambridge University Press 2015.

PY - 2016/5/1

Y1 - 2016/5/1

N2 - A Neoproterozoic granite (Western Huhetaoergai granite) from the Northern Alxa region, southern Central Asia Orogenic Belt (CAOB) is first recognized by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) U-Pb zircon dating (889±8 Ma). It is a highly fractionated potassium-rich calc-alkaline pluton with low ' Nd(t) (-2.6 to -1.1) and high (87Sr/86Sr) t (0.727305-0.735626), and is probably derived from a mantle source and assimilated crustal rocks with very high 87Sr/86Sr. Regional geology implies that it may reflect the existence of a microcontinent, and the formation of the Western Huhetaoergai granite is related to the assembly of Rodinia.

AB - A Neoproterozoic granite (Western Huhetaoergai granite) from the Northern Alxa region, southern Central Asia Orogenic Belt (CAOB) is first recognized by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) U-Pb zircon dating (889±8 Ma). It is a highly fractionated potassium-rich calc-alkaline pluton with low ' Nd(t) (-2.6 to -1.1) and high (87Sr/86Sr) t (0.727305-0.735626), and is probably derived from a mantle source and assimilated crustal rocks with very high 87Sr/86Sr. Regional geology implies that it may reflect the existence of a microcontinent, and the formation of the Western Huhetaoergai granite is related to the assembly of Rodinia.

KW - Alxa

KW - CAOB

KW - granite

KW - Neoproterozoic

KW - zircon U-Pb dating

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U2 - 10.1017/S0016756815000631

DO - 10.1017/S0016756815000631

M3 - Article

SN - 0016-7568

VL - 153

SP - 512

EP - 523

JO - Geological Magazine

JF - Geological Magazine

IS - 3

ER -

Discovery of a Neoproterozoic granite in the Northern Alxa region, NW China: its age, petrogenesis and tectonic significance

Abstract

Keywords

Programme Area

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