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Quantitative and semi-quantitative analyses using a portable energy dispersive X-ray fluorescence spectrometer; Geochemical applications in fault rocks, lake sediments, and event deposits

携帯型成分分析装置を使用した断層岩,湖底堆積物、及び津波堆積物の化学分析手法の検討

渡邊 隆広   ; 石井 千佳子; 石坂 千佳; 丹羽 正和   ; 島田 耕史   ; 澤井 祐紀*; 土屋 範芳*; 松中 哲也*; 落合 伸也*; 奈良 郁子*

Watanabe, Takahiro; Ishii, Chikako; Ishizaka, Chika; Niwa, Masakazu; Shimada, Koji; Sawai, Yuki*; Tsuchiya, Noriyoshi*; Matsunaka, Tetsuya*; Ochiai, Shinya*; Nara, Fumiko*

携帯型成分分析計(potable XRF:ポータブル蛍光エックス線分析装置)は、迅速な化学分析、及びオンサイトでのデータ取得において重要な役割を果たす。しかし、これまでに地質試料に含まれる化学成分の定量分析の実例は限られていた。定量分析を目的として、本研究ではマグネシウムからウランまでの24元素について、地球化学標準試料等を用いて検量線を作成した。さらに、本装置の天然試料への適用性評価のため、敦賀半島等から採取された断層岩試料,能登半島の湖底堆積物、及び仙台平野の津波堆積物の定量分析を実施した。携帯型成分分析計を用いて各試料から得られた定量分析結果は、一部の試料を除き既報値とよく一致した。

A portable energy dispersive X-ray fluorescence spectrometer (potable XRF) can be an effective tool for detecting chemical elements in various materials, such as geological, and environmental samples. In this study, working curves were confirmed using reference materials, such as igneous rocks and other geochemical standards, distributed by national and international organizations. Subsequently, quantification and semi-quantification analyses were performed by the portable XRF for inorganic elements in (A) fault rocks, (B) lake sediments from the middle Japan, and (C) soils with paleotsunami deposits from the Pacific coast of northeast Japan. Twenty-four elements (Mg-U) in these geological samples were measured by potable XRF using our working curves. Measured values by the portable XRF of the samples were good agreement with the reported values in almost cases.

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パーセンタイル:51.59

分野:Mineralogy

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