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An Acid-Based Method for Highly Effective Baddeleyite Separation from Gram-Sized Mafic Rocks

文献类型：期刊论文

作者Guo, Qian1,2; Li, Qiu-Li1,2,4; Chu, Zhu-Yin1,2; Ling, Xiao-Xiao1,2; Guo, Shun1,2; Xue, Ding-Shuai1,2; Yin, Qing-Zhu3
刊名ACS OMEGA
出版日期2022-02-01
卷号7期号:4页码:3634-3638
ISSN号2470-1343
DOI10.1021/acsomega.1c06264
英文摘要Dating mafic igneous rocks (silica-undersaturated) is difficult for the lack of suitable minerals such as zircons (ZrSiO4) commonly found in the sialic rocks such as granites. In this regard, baddeleyite (ZrO2) has been long recognized as the most important mineral to serve as a geochronometer for dating silica-undersaturated igneous rocks. However, separating baddeleyite is difficult due to its small grain size, typical tabular morphology, and low abundance in samples. The standard water-based separation technique requires kilogram-sized samples and usually has a very low recovery rate. In this study, a new separation method based on the different solubilities of the minerals within HF + HCl + HNO3 reagents was developed to achieve a high recovery of baddeleyite. With similar to 19 g of diabase powder, the new method recovers 150-160 baddeleyite grains of 10-100 mu m length and 4-50 mu m width, an order of magnitude improvement over the water-based separation method, which typically recovers 11-12 similarly sized baddeleyite grains out of the similar to 19 g sample. Subsequent secondary ion mass spectrometry U-Pb analyses demonstrate that the baddeleyite grains recovered by the new separation method keep the U-Pb system closed, indicating no Pb loss during acid treatment. Thus, this new method enables the most efficient baddeleyite recovery from gram-sized rocks and is anticipated to greatly contribute to the geochronological study of silica-unsaturated mafic rocks.
WOS关键词MINERAL SEPARATION
资助项目National Natural Science Foundations of China[41903049] ; Key Research Program of IGGCAS[IGGCAS-201901]
WOS研究方向Chemistry
语种英语
WOS记录号WOS:000768309300001
出版者AMER CHEMICAL SOC
资助机构National Natural Science Foundations of China ; National Natural Science Foundations of China ; National Natural Science Foundations of China ; National Natural Science Foundations of China ; Key Research Program of IGGCAS ; Key Research Program of IGGCAS ; Key Research Program of IGGCAS ; Key Research Program of IGGCAS ; National Natural Science Foundations of China ; National Natural Science Foundations of China ; National Natural Science Foundations of China ; National Natural Science Foundations of China ; Key Research Program of IGGCAS ; Key Research Program of IGGCAS ; Key Research Program of IGGCAS ; Key Research Program of IGGCAS ; National Natural Science Foundations of China ; National Natural Science Foundations of China ; National Natural Science Foundations of China ; National Natural Science Foundations of China ; Key Research Program of IGGCAS ; Key Research Program of IGGCAS ; Key Research Program of IGGCAS ; Key Research Program of IGGCAS ; National Natural Science Foundations of China ; National Natural Science Foundations of China ; National Natural Science Foundations of China ; National Natural Science Foundations of China ; Key Research Program of IGGCAS ; Key Research Program of IGGCAS ; Key Research Program of IGGCAS ; Key Research Program of IGGCAS
源URL[http://ir.iggcas.ac.cn/handle/132A11/104969]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Li, Qiu-Li
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
3.Univ Calif Davis, Dept Earth & Planetary Sci, Davis, CA 95616 USA
4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Guo, Qian,Li, Qiu-Li,Chu, Zhu-Yin,et al. An Acid-Based Method for Highly Effective Baddeleyite Separation from Gram-Sized Mafic Rocks[J]. ACS OMEGA,2022,7(4):3634-3638.
APA Guo, Qian.,Li, Qiu-Li.,Chu, Zhu-Yin.,Ling, Xiao-Xiao.,Guo, Shun.,...&Yin, Qing-Zhu.(2022).An Acid-Based Method for Highly Effective Baddeleyite Separation from Gram-Sized Mafic Rocks.ACS OMEGA,7(4),3634-3638.
MLA Guo, Qian,et al."An Acid-Based Method for Highly Effective Baddeleyite Separation from Gram-Sized Mafic Rocks".ACS OMEGA 7.4(2022):3634-3638.

入库方式： OAI收割

来源：地质与地球物理研究所

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