广西贵港靖西玻璃陨石的发现与研究

来源期刊：中南大学学报(自然科学版)1997年第2期

论文作者：陈世益

文章页码：11 - 13

关键词：中更新世； 年龄； 裂变径迹法； 玻璃陨石； 广西

Key words：middle pleistocene epoch； age； fission-track； tektite； Guangxi

摘    要：研究了近年来在广西贵港、横县、平果 和靖西等地相继发现的玻璃陨石，经测定，其裂变径迹年龄为0．737Ma，基本特征与我国海南、雷州半岛以及印度尼西亚、澳大利亚等地的玻璃陨石相似，同属亚澳散布区撞击事件的产物，可作为早更新世松山反向极性时与中更新世布容正向极性时之间的事件地层年代学标志物．它的发现不仅为距今0．7Ma前天体撞 击地球事件、探寻源岩和靶坑提供有关资料，而且对广西第四纪地质、地貌和矿产研究也有实际意义．

Abstract: Tektites have successively been found by the author in the districts of Guigang,Hengxian,Pingguo and Jinxi of Guangxi Province,China in recent years .Their age is dated to be 0.737 Ma by the fission-track analysis.Their basic characteristics are similar to those of the tektites from China ′s Hainan Island and Leizhou Peninsula as well as from Indonesia and Australia,all belonging to the products of the meteorite impact event in East Asia-Australia disseminating region.The Guangxi tektites can serve as the marker of event-stratigraphical chronology between the Matsuyama revers-polarity chron of early Pleistocene Epoch and the Brunhes positive-polarity chron of middle Pleistocene Epoch.The discovery of the Guangxi tektites offers the relevant data not only for determining the celestial bodies , shock on the earth at 0.7 Ma, but also for approaching their source rocks and craters.In addition, their discovery is of real significance to the researches of Quaternary geology,geomorphy and minerals in Guangxi Province.