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西藏地矿局区调大队二分队,在1979—1983年进行1:100万改则幅区域地质调查工作中,在西藏北部迎春口(东经89°30′～90°00′,北纬34°50′～35°20′);果干加年山至西亚尔岗(东经86°00′～88°40′,北纬33°15′～33°35′)地区,首次发现含兰闪石类岩石,现就其产出地质背景及特点,作一概略介绍。 (一) 迎春口地区的含兰闪石类岩石特征: 该区广泛分布着三叠系若拉岗日群,它是一套厚约8000～10000m的浅变质岩系,主
During the 1979-1983 regional geological survey conducted at 1: 1 million in 1979-1983, the second detachment of Tibet Geological and Mineral Resources Bureau transferred brigade members from the Yingchunkou (longitude 89 ° 30 ’to 90 ° 00’ east longitude, 34 ° 50 ° north latitude ’~ 35 ° 20’). For the first time, the area from the Nanshan Mountains to the West Yar Kong (longitude 86 ° 00 ° to 88 ° 40 ’, latitude 33 ° 15’ to 33 ° 35 ’) has been found to contain amphibole- , Is now on its output geological background and characteristics, make a rough introduction. (I) Characteristics of the amphibole-bearing rocks in the Yingchukou area: The Triassic Ruolanggang group is widely distributed in this area. It is a set of shallow metamorphic rocks with a thickness of 8000-10000m.