Photographic positions of Minor Planets

Photographic precise positions of 16 minor planets obtained with the G.P.O. astrograph at ESO (La Silla, Chile) are given.     

Positions of 46 radio stars: Observations of 1984–1985 and 1989–1991

The results of observations of 46 radio stars carried out with the Repsold meridian circle of the Kyyiv University Observatory in 1984–1985 and 1989–1991 are presented. The main goal of these observations is to improve the optical positions of radio stars for determination of a relationship between the optical and VLBI reference frames. The standard errors of averaged positions in two catalogues amount to 0.2 arcsec. These results were compared with those obtained with the Bordeaux meridian circle.     

苏鲁造山带南缘基础地质研究进展

苏鲁造山带南缘发育的超高压变质成因的榴辉岩带是整个中国中部造山带折返抬升最高部位，具有较典型的造山带根部特征。通过区域地质调查工作，查明区内发育岩石地层有新太古代至古元古代东海岩群、中新元古代锦屏岩群和云台岩群，呈一系列北东向和近东西向构造岩块分布，岩石中密集发育晋宁期韧性推覆剪切带和右形走滑韧性剪切带，后期普遍为印支期滑脱韧性剪切带叠加，形成复杂的韧性剪切系统，是阜宁期华北板块南缘地体拼贴B型俯冲碰撞作用、晋宁期华北板块与扬子板块软碰撞作用和印支期扬子板块向华北板块之下A型俯冲碰撞作用的结果。