S3イオンは,高温と高圧で地質学的流体の中で安定しています
Gleb S Pokrovski1, Leonid S Dubrovinsky
1Géosciences Environnement Toulouse (GET, ex-LMTG), UMR 5563 of CNRS, Université Paul Sabatier, 14, avenue Edouard Belin, F-31400 Toulouse, France. gleb.pokrovski@get.obs-mip.fr
Science (New York, N.Y.)
|February 26, 2011
まとめ
三硫黄イオン (S3-) は,250°C以上および0.5GPa以上の地質学的流体における支配的な硫黄形態であり,硫酸塩および硫化物に関する以前の仮定に異議を唱える. この発見は,硫黄と黄金の輸送に影響を与え,硫黄の同位体モデルの見直しを必要とする.
科学分野:
- 地質化学 地質化学
- ミネラロジーは,鉱物学です.
- 地質学 地質学 地質学
背景:
- 地質学的流体における硫黄の特異化は,地球のプロセスに影響を与えます.
- 硫酸塩と硫化物は,地殻液中の主要な硫黄形態と考えられていた.
- 硫黄の特異性を理解することは,経済地質学と地化学にとって極めて重要です.
研究 の 目的:
- 地質学的流体における硫黄の支配的な安定形態を,高温と高圧で調査する.
- 深層地殻環境における硫黄の種化に関する一般的な理解に異議を唱える.
- 新種の硫黄特異が元素輸送と同位素分断に及ぼす影響を評価する.
主な方法:
- 硫黄の特異性を分析するために,in situ ラーマン光譜を用いた.
- 実験は,深層地質環境 (250°C以上,0.5GPa以上) をシミュレートした条件下で実施されました.
- 分析は,溶けた硫黄の化学的形態を特定することに焦点を当てました.
主要な成果:
- 三硫黄イオン (S3-) は,250°C以上および0.5GPa以上の水溶液における硫黄の支配的な安定形態として特定されました.
- この発見は,硫酸塩と硫化ガスが主要な種であるという広く受け入れられている見解と対照的です.
- S3-の安定性は,気温と圧力の大幅な範囲で実証されました.
結論:
- 三硫黄イオン (S3-) は,地質流体における硫黄と黄金の輸送と濃縮に重要な役割を果たします.
- その安定性は,メタモルフィックおよびサブダクションゾーンの環境におけるプロセスに影響を与えます.
- 硫化物と硫酸塩の間の硫黄同位素分断モデルの見直しは,S3-. . .の流行により必要である.
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