归算震源面上P波和S波走时的方法

本文介绍了一种计算震源深度处地震波速度的方法，其中使用了球对称的层状地球模型及关于震中距与地震波走时之间的解析关系。该方法应用到蒂勒尼安南部区域和日本诸岛，可以由观测到的走时归算出震源深度的地震波速度，而无须借助于专门的速度模型。     

一个外国人看中国地图学教育——中国的高等地图学教育

一个外国人看中国地图学教育──中国的高等地图学教育［俄］Ａ．Ｍ．Ｂｅｒｌｙａｎｔ编者按：俄国莫斯科大学教授Ａ．Ｍ．Ｂｅｒｌｙｓｎｔ在访问武测科大和南京大学等单位后，写成此文。从一个侧面反映了我国地图学教育的成就。译文中个别字句稍有删节。地图学在中国源...     

Oxygen Isotope Records of Core 8KL of the South China Sea and Sea - level Change

Based on a comparison between the oxygen isotope records of benthic and plank tonic foraminifers from core 8KL of the South China Sea and sea-level change records derived from the Huon Peninsula, New Guinea, it is found that both records are very similar from 72 K a B.P. to the present, especially for the benthic oxygen isotope record. The linear regression shows that δ18O changes (0.9995‰ for benthic foraminifers and 1.022‰ for planktonic foraminifers) are equal to 100 m in sea-level fluctuation. After making temperature correction in the δ18O record of benthic foraminifers from 72 to 120 Ka B.P., the curve of sea-level oscillation of the South China Sea since 186 Ka B.P. has been reconstructed. The lowermost sea - level that occurred in the last glacial maximum and oxygen isotope stage 6 is approximately - 130 m.     

无岩心钻进地质勘探井的经验

使用3иФ-1200A型钻机组钻进了垂直井.不取心钻进矿体上复岩层(0—600米),矿体和下伏岩层取心钻进.为了研究某些地质单元(接触带、标示层),在钻进矿体上复岩层时,根据需要在间隔40—50米提取一次岩样.上复岩层的岩石是1)Ⅶ级石英斑岩的风化裂隙高岭上质凝灰     

干式集尘器

所叙述的集尘器的特点是装备有铰链式吸尘罩.罩的下部放有带口的棱形箱以便大