First evidence of the Cambrian basement in Upper Peninsula of Thailand and its implication for crustal and tectonic evolution of the Sibumasu terrane

Yu Ling Lin; Meng Wan Yeh; Tung Yi Lee; Sun Lin Chung; Yoshiyuki Iizuka; Punya Charusiri

doi:10.1016/j.gr.2013.05.014

First evidence of the Cambrian basement in Upper Peninsula of Thailand and its implication for crustal and tectonic evolution of the Sibumasu terrane

Yu Ling Lin, Meng Wan Yeh^*, Tung Yi Lee, Sun Lin Chung, Yoshiyuki Iizuka, Punya Charusiri

^*Corresponding author for this work

Department of Earth Sciences (Include Institute of Marine Environmental Science and Technology)

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

64 Citations (Scopus)

Abstract

Although the Sibumasu terrane in Asia was previously considered to be composed of Phanerozoic rocks with Cambrian crystalline basement, no reliable or direct radiometric dating evidences of such crystalline basement was ever reported. Our new in-situ zircon U/Pb dating of the Khao Tao orthogneiss yields a concordant age of 501.5±7.5Ma (2σ), which provides the first robust evidence for the Cambrian crust in Upper Peninsula of Thailand. The zircon εHf_(T) values range from +3.7 to -6.1 with model ages (T^C_DM) of 1244-1827Ma, suggests a mixed crust-mantle source. The chemical similarity and spatial continuity of the Khao Tao orthogneiss with other pre-Neotethys marginal Eurasian and Sibumasu granitoids indicate the linear paleogeographic association under a similar magmatic arc-related regime along the Gondwana India-Australia margin as part of the Pan-African Orogeny system.

Original language	English
Pages (from-to)	1031-1037
Number of pages	7
Journal	Gondwana Research
Volume	24
Issue number	3-4
DOIs	https://doi.org/10.1016/j.gr.2013.05.014
Publication status	Published - 2013 Nov

Keywords

Gondwana tectonic
Hf isotopic ratio
Sibumasu terrane
Zircon U-Pb age

ASJC Scopus subject areas

Geology

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10.1016/j.gr.2013.05.014

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title = "First evidence of the Cambrian basement in Upper Peninsula of Thailand and its implication for crustal and tectonic evolution of the Sibumasu terrane",

abstract = "Although the Sibumasu terrane in Asia was previously considered to be composed of Phanerozoic rocks with Cambrian crystalline basement, no reliable or direct radiometric dating evidences of such crystalline basement was ever reported. Our new in-situ zircon U/Pb dating of the Khao Tao orthogneiss yields a concordant age of 501.5±7.5Ma (2σ), which provides the first robust evidence for the Cambrian crust in Upper Peninsula of Thailand. The zircon εHf(T) values range from +3.7 to -6.1 with model ages (TCDM) of 1244-1827Ma, suggests a mixed crust-mantle source. The chemical similarity and spatial continuity of the Khao Tao orthogneiss with other pre-Neotethys marginal Eurasian and Sibumasu granitoids indicate the linear paleogeographic association under a similar magmatic arc-related regime along the Gondwana India-Australia margin as part of the Pan-African Orogeny system.",

keywords = "Gondwana tectonic, Hf isotopic ratio, Sibumasu terrane, Zircon U-Pb age",

author = "Lin, {Yu Ling} and Yeh, {Meng Wan} and Lee, {Tung Yi} and Chung, {Sun Lin} and Yoshiyuki Iizuka and Punya Charusiri",

note = "Funding Information: The authors wish to thank the National Science Council of Taiwan for the financial support ( NSC 98-2116-M-003-003, and NSC 99-2116-M-003-005 ). Greg Shellnutt is thanked for the helpful discussion on the geochemical data and English proofreading.",

year = "2013",

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AU - Lin, Yu Ling

AU - Yeh, Meng Wan

AU - Lee, Tung Yi

AU - Chung, Sun Lin

AU - Iizuka, Yoshiyuki

AU - Charusiri, Punya

N1 - Funding Information: The authors wish to thank the National Science Council of Taiwan for the financial support ( NSC 98-2116-M-003-003, and NSC 99-2116-M-003-005 ). Greg Shellnutt is thanked for the helpful discussion on the geochemical data and English proofreading.

PY - 2013/11

Y1 - 2013/11

N2 - Although the Sibumasu terrane in Asia was previously considered to be composed of Phanerozoic rocks with Cambrian crystalline basement, no reliable or direct radiometric dating evidences of such crystalline basement was ever reported. Our new in-situ zircon U/Pb dating of the Khao Tao orthogneiss yields a concordant age of 501.5±7.5Ma (2σ), which provides the first robust evidence for the Cambrian crust in Upper Peninsula of Thailand. The zircon εHf(T) values range from +3.7 to -6.1 with model ages (TCDM) of 1244-1827Ma, suggests a mixed crust-mantle source. The chemical similarity and spatial continuity of the Khao Tao orthogneiss with other pre-Neotethys marginal Eurasian and Sibumasu granitoids indicate the linear paleogeographic association under a similar magmatic arc-related regime along the Gondwana India-Australia margin as part of the Pan-African Orogeny system.

AB - Although the Sibumasu terrane in Asia was previously considered to be composed of Phanerozoic rocks with Cambrian crystalline basement, no reliable or direct radiometric dating evidences of such crystalline basement was ever reported. Our new in-situ zircon U/Pb dating of the Khao Tao orthogneiss yields a concordant age of 501.5±7.5Ma (2σ), which provides the first robust evidence for the Cambrian crust in Upper Peninsula of Thailand. The zircon εHf(T) values range from +3.7 to -6.1 with model ages (TCDM) of 1244-1827Ma, suggests a mixed crust-mantle source. The chemical similarity and spatial continuity of the Khao Tao orthogneiss with other pre-Neotethys marginal Eurasian and Sibumasu granitoids indicate the linear paleogeographic association under a similar magmatic arc-related regime along the Gondwana India-Australia margin as part of the Pan-African Orogeny system.

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KW - Zircon U-Pb age

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First evidence of the Cambrian basement in Upper Peninsula of Thailand and its implication for crustal and tectonic evolution of the Sibumasu terrane

Abstract

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