LI Shi-jie1,2, LUO Wei-jun3, LI Bo-fang4, LI Yang2,5
(1. Guangxi Hidden Mineral Exploration Center, College of Earth Sciences, Guilin University of Technology, Guilin 541004, China;
2. Center for Lunar and Planetary Sciences, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China;
3. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China;
4. Bing 9, Jiaochangkou Street 9, Dewai Street, Xicheng District, Beijing 100120, China;
5. Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China)
Abstract: On June 1st, 2018, at 21:43 Beijing Time (UT+8), a meteor bolide lightened sky and fell across the southwestern Jinghong Ciry, Xishuangbanna Prefecture in Yunnan Province. On the basis of videos taken by several witnesses in Jinghong City, we believe that it should be a meteorite landing event. It is another witnessed meteor bolide appeared in Yunnan province since the mid-autumn festival fireball incident in the Shangri-la area on 4th of October 2017. On June 2nd, it is said that a piece of fresh meteorite was found by some residents in the Manlun village, Mengzhe town, Menghai county, Xishuangbanna region. The news spreaded on the internet rapidly, and numerous meteorite collectors, dealers and news reporters flooded there. Many meteorites, found in following days, revealed that there was a big meteorite shower in the area. So far, the currently collected data indicate that this meteorite shower covers an area of about 3 km by 12 km According to our calculation, the meteorite fireball had falled at an angle of (55.3±2.5)° with respect to the horizon, in the direction from SE to NW. So far, the identified strewn field is 3 km×12 km Over 1000 individuals or fragments of meteorite, with weighted mass varying from 0.04 g to 1280 g, and total mass of over 50 kg, had been found in over 10 villages. The classification result shows that meteorites of the shower belong to the L6 type, with the shock intensity of S4.
Keywords: Xishuangbanna; meteorite shower; strewn field; ordinary chondrite; Mangui
ACTA MINERALOGICA SINICA Vol. 40, No.2, 2020, page 176-182
