澳大利亚西部太古代浅层脉金矿中的地表水的渗入

澳大利亚西部太古代浅层脉型金矿位于葡萄石－绿纤石岩相至低级绿片岩相岩石中，具有以下特征：（１）矿床主要赋存火山作用和构造活动期后形成的脆性剪切带中；（２）矿脉赋存于砾岩中；（３）含银硫盐、辉锑矿和早期的玉髓等低温矿石和脉矿物；（４）矿体内金属具有垂向分带性。     

“符号轮转笔”创制成功——提高绘图效率26倍

冶金工业勘察总公司武汉分公司测绘科绘图员杨汉祥同志,在党和上级的支持与苏联专家的帮助下,经过三年多时间的辛勤钻研,多次试验改进,已试制成功了一种供地形图的清绘和描透明图使用的“符号轮转笔”。     

A High-Eccentricity Low-Mass Companion to HD 89744

We present deep Hubble Space Telescope (HST) imaging, as well as ground-based imaging and spectroscopy, of the optical afterglow associated with the long-duration gamma-ray burst GRB 990712 and its host galaxy. The data were obtained 48-123 days after the burst occurred. The magnitudes of the host (R=21.9, V=22.5) and optical afterglow (R=25.4, V=25.8, 47.7 days after the burst) favor a scenario in which the optical light follows a pure power-law decay with an index of alpha approximately -1.0. We find no evidence for a contribution from a supernova like SN 1998bw. This suggests that either there are multiple classes of long-duration gamma-ray bursts or that the peak luminosity of the supernova was more than 1.5 mag fainter than SN 1998bw. The HST images and EFOSC2 spectra indicate that the gamma-ray burst was located in a bright, extended feature (possibly a star-forming region) 1.4 kpc from the nucleus of a 0.2L*B galaxy at z=0.434, possibly a Seyfert 2 galaxy. The late-time afterglow and host galaxy of GRB 990712 bear some resemblance to those of GRB 970508.     

风雨过后见彩虹——记局劳动模范、二六四大队矿产开发公司经理叶秋生

二六四大队矿产开发公司立足“111”产品．大力发展稀土行业和果业．各项工作取得了骄人业绩：去年，黄泥湖矿点自采矿石生产“111”产品创历史最高纪录：稀土矿生产稀土70吨．产值330万元．上缴利税100多万元：脐橙产量大幅增长．年产48万斤．产值70万元，实现利润40万元。     

下辽河盆地和辽西及内蒙地区部分浅部断层判别特征的研究

将理论分析与野外资料解释相结合,对断层判别依据作进一步讨论。通过对下辽河盆地和辽西、内蒙地区部分浅部断层数字化记录资料的正、反演计算,作了运动学特征和动力学特征分析,得出有益结论。