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Environment
原位含甲烷沉积物中自黄铁矿的制备及应用模拟器硫同位素分析
原位含甲烷沉积物中自黄铁矿的制备及应用模拟器硫同位素分析
JoVE Journal
Environment
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JoVE Journal Environment
Preparation of Authigenic Pyrite from Methane-bearing Sediments for In Situ Sulfur Isotope Analysis Using SIMS

原位含甲烷沉积物中自黄铁矿的制备及应用模拟器硫同位素分析

Full Text
8,166 Views
09:31 min
August 31, 2017

DOI: 10.3791/55970-v

Zhiyong Lin1,3, Xiaoming Sun1,2,3,4, Jörn Peckmann5, Yang Lu2,3, Harald Strauss6, Li Xu2,3, Hongfeng Lu7, Barbara M.A. Teichert6

1School of Earth Sciences and Engineering,Sun Yat-sen University, 2School of Marine Sciences,Sun Yat-sen University, 3Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, 4South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center, 5Institut für Geologie,Universität Hamburg, 6Institut für Geologie und Paläontologie,Westfälische Wilhelms-Universität Münster, 7Guangzhou Marine Geological Survey

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含甲烷沉积物中黄铁矿的硫同位素组成 (δ34) 的分析通常集中在散装样品上。在这里, 我们应用二次离子质谱分析了不同黄铁矿世代的δ34值, 以了解黄的成岩史。

该程序的总体目标是通过二次离子质谱分析各种黄铁矿代的原位硫同位素组成,以了解含甲烷沉积物中黄铁矿化的成岩历史。这种方法可以帮助识别影响黄碱化作用的生物地球化学过程,例如有机碎屑硫还原和硫驱动的甲烷厌氧氧化,这些过程现在可以通过一盒同位素分析仪来解决。该技术的主要优点是高分辨率和精度,这使我们能够在微观尺度上分析黄铁矿的硫同位素组成。

演示 SIMS 分析程序的是广州地球化学研究所 SIMs 实验室的技术人员 Qing Yang。首先,清洁沉积物岩芯的表面,并使用刀在整个长度上收集一组样品。将湿样品单独装在拉链塑料袋中,并使用记号笔标记。

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