A Rapid Method to Determine the Re-Os Age and Re Content of Molybdenite by Inductively Coupled Plasma-Mass Spectrometry

YANG Xue; LI Chao; LI Xin-wei; DU An-dao; ZHOU Li-min; QU Wen-jun

doi:10.15898/j.cnki.11-2131/td.2016.01.005

2016 Vol. 35, No. 1

Article Contents

Article navigation > Rock and Mineral Analysis > 2016 > 35(1): 24-31

Next Article Previous Article

YANG Xue, LI Chao, LI Xin-wei, DU An-dao, ZHOU Li-min, QU Wen-jun. A Rapid Method to Determine the Re-Os Age and Re Content of Molybdenite by Inductively Coupled Plasma-Mass Spectrometry[J]. Rock and Mineral Analysis, 2016, 35(1): 24-31. doi: 10.15898/j.cnki.11-2131/td.2016.01.005

Citation:

YANG Xue, LI Chao, LI Xin-wei, DU An-dao, ZHOU Li-min, QU Wen-jun. A Rapid Method to Determine the Re-Os Age and Re Content of Molybdenite by Inductively Coupled Plasma-Mass Spectrometry[J]. Rock and Mineral Analysis, 2016, 35(1): 24-31. doi: 10.15898/j.cnki.11-2131/td.2016.01.005

A Rapid Method to Determine the Re-Os Age and Re Content of Molybdenite by Inductively Coupled Plasma-Mass Spectrometry

1.
College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
2.
National Research Center for Geoanalysis, Beijing 100037, China
3.
Key Laboratory of Re-Os Isotope Geochemistry, Chinese Academy of Geological Sciences, Beijing 100037, China

More Information

Corresponding author: LI Chao, Re-Os@163.com

Received Date: 17 March 2015

Revised Date: 05 January 2016

Accepted Date: 10 January 2016

Publish Date: 25 January 2016

Abstract

Abstract

Re-Os isotope method is a powerful tool for dating ore deposits, but digesting samples with the Carius tube is complicated and dangerous.A simple and quick method to determine the age of molybdenite Re-Os and Re content has been established.5-15 mg of molybdenite samples were digested with 3 mL HNO₃ in a 10 mL colorimetric cylinder.Molybdic acid in solution was removed by a centrifuge, the supernatant of the solution was then diluted to an appropriate volume.M187/M185 ratio of the resulting solution was determined directly by Inductively Coupled Plasma-Mass Spectrometry(ICP-MS).According to the principle of radioactive decay, it can be inferred that the mass ratio is positively correlated with the age.The Re-Os age of the sample can be calculated by comparing with the M187/M185 ratio of the molybdenite standard material(JDC and HLP).The Re content in the sample can be calculated on the basis of ¹⁸⁵Re counting using the relative method.In order to test the reliability of this method, a series of molybdenite samples, whose ages vary from 13.26 Ma to 2130 Ma, were analyzed.The resulting ages were generally identical to the reference ages within 0.36%-7.42% deviations.The samples with older ages yield better results because the ¹⁸⁷Os is more radiogenic.This method, without spike addition, can avoid the trouble of sealing and opening the Carius tube and the process of separating and purifying Re and Os, which significantly improves the experimental efficiency.This simple and quick method is highly suitable for the preliminary analysis of molybdenite Re-Os ageing.
- molybdenite /
- Re-Os Dating /
- Re content /
- M187/M185 mass ratio /
- Inductively Coupled Plasma-Mass Spectrometry

FullText(HTML)

References

[1]	http://www.cnki.com.cn/Article/CJFDTOTAL-YKCS200903027.htm
[2]
[3]	http://www.cnki.com.cn/Article/CJFDTOTAL-KYDH201302003.htm
[4]
[5]	http://www.cnki.com.cn/Article/CJFDTOTAL-YSXB201005025.htm
[6]	http://www.cnki.com.cn/Article/CJFDTOTAL-YKCS199303000.htm
[7]	http://www.cnki.com.cn/Article/CJFDTOTAL-ZPXB199702001.htm
[8]	http://www.cnki.com.cn/Article/CJFDTOTAL-YKCS200404007.htm
[9]	http://www.cnki.com.cn/Article/CJFDTOTAL-CCDZ201206020.htm
[10]	http://www.cnki.com.cn/Article/CJFDTOTAL-DZLP201006008.htm
[11]	http://www.cnki.com.cn/Article/CJFDTOTAL-KCDZ200904002.htm
[12]	http://www.cnki.com.cn/Article/CJFDTOTAL-ZQYD200604014.htm
[13]	http://www.cnki.com.cn/Article/CJFDTOTAL-JDXK200404006.htm
[14]	http://www.cnki.com.cn/Article/CJFDTOTAL-DZLP199904014.htm
[15]	doi: 10.1046/j.1365-3121.2001.00395.x
[16]	http://www.cnki.com.cn/Article/CJFDTOTAL-YKCS200104001.htm
[17]	http://www.cnki.com.cn/Article/CJFDTOTAL-YKCS201001007.htm
[18]	http://www.cnki.com.cn/Article/CJFDTOTAL-YKCS201203007.htm
[19]	doi: 10.1016/j.chemgeo.2007.06.002
[20]	doi: 10.1016/0016-7037(96)00120-2
[21]	http://www.cnki.com.cn/Article/CJFDTOTAL-YKCS201303008.htm
[22]	http://www.cnki.com.cn/Article/CJFDTOTAL-YKCS200903014.htm
[23]	http://www.cnki.com.cn/Article/CJFDTOTAL-YKCS200304003.htm
[24]	http://www.cnki.com.cn/Article/CJFDTOTAL-DQHX201204007.htm
[25]
[26]	http://www.cnki.com.cn/Article/CJFDTOTAL-DGYK201203009.htm
[27]	http://www.cnki.com.cn/Article/CJFDTOTAL-DZXE199404003.htm
[28]	http://cpfd.cnki.com.cn/Article/CPFDTOTAL-ZPXH200410001091.htm
[29]	http://www.cnki.com.cn/Article/CJFDTOTAL-DQXB201206007.htm
[30]