感應耦合電漿質譜術之建立與應用 (III): 青藏高原構造演化
Date Issued
2004
Date
2004
Author(s)
DOI
912116M002024
Abstract
This project is proposed as a three-year project to develop the quadrupole ICP-MS, i.e., a new
Agilent (originally HP) 7500s, has been installed in this department for potential applications in
geosciences and environmental sciences. In the first year, the analytical procedures which would
enable the ICP-MS to precisely and simultaneously determine about 40 trace elements in rock
samples has been established. The procedures includes: (1) digestion of rock samples using distilled
HF+HNO3 in screw-top teflon beakers in the clean room, (2) digestion of USGS and other rock
standards through the same processes and then using them as calibration references, and (3) using
certain internal standards during the measurements to monitor the sensitivity shift of the machine.
Consequently, the ICP-MS method developed marks with: (1) simple sample preparation, (2)
straightforward data reduction, and (3) high analytical precision, and thus can be applicable to trace element determinations of common rock samples. In the 3 rd year of this project, the quadrupole
ICP-MS has been successfully linked with a NW 213 laser ablation system, which can be used for
in-situ trace element analyses as well as zircon U-Pb dating. These methods are currently applied to
study certain outstanding geologic problems in Southeast Asia such as the tectonomagmatic evolution of the Himalayas and Tibetan platea.
Subjects
ICP-MS
Trace element determinations
zircon U-Pb dating
Tibet
Publisher
臺北市：國立臺灣大學地質科學系暨研究所
Type
report
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