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Citation: WANG Hua-Jian, ZHANG Shui-Chang, YE Yun-Tao, WANG Xiao-Mei, ZHOU Wen-Xi, SU Jin. In situImaging of Multi-elements on Pyrite Using Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry[J]. Chinese Journal of Analytical Chemistry, ;2016, 44(11): 1665-1670. doi: 10.11895/j.issn.0253-3820.160580 shu

In situImaging of Multi-elements on Pyrite Using Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry

WANG Hua-Jian ^1,2, ,
ZHANG Shui-Chang ^1,2 ,
YE Yun-Tao ^1,2,3 ,
WANG Xiao-Mei ^1,2 ,
ZHOU Wen-Xi ^1,2,4 ,
SU Jin ^1,2

1.
Key Laboratory of Petroleum Geochemistry, China National Petroleum Corporation, Beijing 100083, China;
2.
Research Institute of Petroleum Exploration and Development, Beijing 100083, China;
3.
Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, School of Earth and Space Sciences, Peking University, Beijing 100871, China;
4.
College of Resource and Environmental Engineering, Guizhou University, Guiyang 550025, China

Received Date: 4 August 2016
Revised Date: 18 September 2016

Fund Project: This work was supported by the National Natural Science Foundation of China (No.41530317) and the Science and Technology Project of Petrochina (No. 2016A-0205)

A method of in situ multi-elements 2D imaging on single pyrite was developed using laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS). Nine elements and nearly 50 thousands valid data were acquired in a 1 mm×1 mm scanning area, with the total analyzed time of 1.5 h. The data showed that, the signals of Fe and S were uniformly distributed on the pyrite, and the ratio data of Fe/S was centralized with a lower relative standard deviation of 11.6%, indicating the good homogeneity of this pyrite and stability of this method. Compared to the surrounding black shale, the detected trace elements on the pyrite showed different degrees of enrichment or loss, which might be the response of redox environment during this pyrite forming or the later secondary reforming process. The method will help for the popularization and application of LA-ICP-MS in single mineral particles analysis, and provide more direct and accurate visual data for the study of paleoenvironment, source rock and fluid accumulation.
- Laser ablation,
- Inductively coupled plasma mass spectrometry,
- Pyrite,
- Trace elements,
- In situimaging
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