Characteristics of Granitic Pegmatite with High-Purity Quartz in Spruce Pine Region, USA and Altay Region of Xinjiang, China

• 责任者：Zhang Ye (State Key Laboratory for Mineral Deposits Research ; School of Earth Sciences and Engineering ; Nanjing University ; Nanjing 210093 ; China) ; Chen Peirong
• 刊名：Geological Journal of China Universities
• 出版年：2010
• 卷期：16(4)
• 关键词：伟晶岩 ; pegmatite ; 新疆 ; Xinjiang ; 美国 ; United States
• 页码：p.426-435
• 图表：5 illus., 2 tables, 19 refs.
• 分类号：0801
• issnNo：ISSN1006-7493
• isbnNo：CN32-1440/P

The alaskites/pegmatites from the Spruce Pine region of USA and the muscovite granites/pegmatites from the Altay region of Xinjiang, China, were comparatively studied. The pegmatites from both regions might be melt-vapor differentiation products of the peraluminous granitic magmas. The pegmatites from the Spruce Pine region with high-purity quartz were developed on the schist or gneiss background, whose major rock-forming minerals are rich in plagioclase, showing high Na/K ratios, high large-ion lithophile elements Sr and Ba contents, low high-field strength and rare earth elements contents, positive Eu anomalies, and low impurity elements contents in quartz. All these characteristics can be used as the discrimination criteria of high-purity quartz pegmatities.