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1959年,北京大学地质系的师生在北京某山区进行地质填图,原延庆县地质局的阎登稳等同志也参加了工作。八月间转入室内整理工作。一天下午,原延庆县地质局的技术队长郑恩义同志在地质组查看标本时,发现了闪长玢岩上有鳞片状的辉钼矿晶体,可是野外记录簿上没有记述,这是个莫大的遗漏。 "怎么办?走一趟!’郑队长走出门外在暮色苍茫中看了看手表自言自语地说。他毅然返回地质组找到阎登稳和李慧华等同志,立即奔赴现场。结果在打标本的地方又发现了辉钼矿,同时在溪流旁还发现了钼华,由此揭开了在此地勘探钼矿的序幕。
In 1959, faculty and students of the Department of Geology of Peking University carried out geological mapping in a mountainous area of Beijing. Yan Dengwen and other comrades from Yanqing Geological Bureau also took part in the work. Turn into interior finishing work in August. One afternoon in the afternoon, Comrade Zheng Enyi, former technical captain of the Yanqing Bureau of Geology, discovered scale-shaped molybdenite crystals on the diorite porphyrite while viewing the specimens in the geologic formations. However, there was no description on the field record books. This is a huge omission. Zheng captain walked out in the twilight vastness looked at his watch and said to himself.He resolutely returned to the geological group to find Yan Dengwen and Li Huaihua and other comrades immediately went to the scene results in the marking Molybdenite was discovered in this place, and at the same time, molybdenum was discovered next to the stream, thus opening the curtain for the exploration of molybdenum here.