Quaternary zircon geochronology by secondary ion mass spectrometry: A case study of the Chinkuashi dacite from northeastern Taiwan.

Earth Science Frontiers ›› 2010, Vol. 17 ›› Issue (2): 146-155.

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Quaternary zircon geochronology by secondary ion mass spectrometry: A case study of the Chinkuashi dacite from northeastern Taiwan.

GAO Yu-Ya, LI Xian-Hua, LI Qiu-Li, ZHONG Sun-Lin-

1State Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029,China
2Department of Geosciences, National Taiwan University, Taipei 106, China

Received:2010-02-12 Revised:2010-03-04 Online:2010-03-15 Published:2010-04-05

Abstract

Abstract:

Precise age determination of geological events throughout the Quaternary period is fundamental for Quaternary studies and paramount for understanding the Earths evolution. Large radius secondary ion mass spectrometry (SIMS) has increasingly been used in Quaternary geochronology due to its highresolution, highprecision, highefficiency, and nondestructive nature. When applied to UPb zircon geochronology the micrometerscale spatial resolution and high mass resolving power (MRP) of SIMS make it possible to extract complex geologic information preserved within micronsized minerals that would otherwise be obscured or overlooked using other methods. In this paper, we introduce the principles, analytical techniques and correction methods of SIMS insitu UPb dating for Quaternary zircons, and report a SIMS UPb zircon age of (1166±0020) Ma for the Quaternary Chinkuashi dacite from northeastern Taiwan.

Key words: SIMS, Quaternary zircon, UPb dating, Useries dating

CLC Number:

P597.3

GAO Yu-Ya, LI Xian-Hua, LI Qiu-Li, ZHONG Sun-Lin-. Quaternary zircon geochronology by secondary ion mass spectrometry: A case study of the Chinkuashi dacite from northeastern Taiwan.[J]. Earth Science Frontiers, 2010, 17(2): 146-155.

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Quaternary zircon geochronology by secondary ion mass spectrometry: A case study of the Chinkuashi dacite from northeastern Taiwan.

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