Affiliation:
1. School of Gemology, China University of Geosciences (Beijing), No. 29 Xueyuan Road, Haidian District, Beijing 100083, China
Abstract
Ospinsk is an area in Russia well-known for mining the highest quality green nephrite in the world. However, the chatoyant green nephrite found here has not been studied to date. This study explores the mineralogy, geochemistry, and petrogenesis of chatoyant green nephrite collected from Ospinsk using polarizing microscope back-scattered electron images, scanning electron microscopy, Fourier transform infrared spectrometry, laser Raman spectroscopy, electron microprobe analysis, and laser ablation inductively coupled plasma mass spectrometry, and compares them with S-type green nephrite from other regions of the world. Tremolite is the main mineral constituent, and chromite, chlorite, graphite, and magnetite are accessory minerals in the samples. The chatoyant green nephrite from Ospinsk is serpentinite-related green nephrite. The Ti content of the chatoyant green nephrite from Ospinsk is significantly higher than that of green nephrite from other places. The chatoyant green nephrite deposit in Ospinsk is a contact metasomatic deposit related to ultramafic rocks. The ultramafic rocks first altered to serpentinite and later converted to tremolite after repeated thermal contact-based metasomatism. During the metasomatism of serpentinite into green nephrite, unilateral, compressive, and shear stresses caused by obduction forced directional growth of tremolite, resulting in chatoyancy.
Funder
the Central Universities of the Ministry of Education of China
the National Natural Science Foundation of China
Subject
Inorganic Chemistry,Condensed Matter Physics,General Materials Science,General Chemical Engineering
Reference102 articles.
1. Jade (nephrite and jadeitite) and serpentinite: Metasomatic connections;Harlow;Int. Geol. Rev.,2005
2. Groat, L.A. (2014). The Geology of Gem Deposits, Mineralogical Association of Canada. [2nd ed.].
3. Black Nephrite Jade from Guangxi, Southern China;Zhong;Gems Gemol.,2019
4. Element geochemical characteristics of nephrite in Luodian, Guizhou Province;Zhang;J. Mineral.,2015
5. Geochemistry and petrogenesis of placer nephrite from Hetian, Xinjiang, Northwest China;Liu;Ore Geol. Rev.,2011
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