Progresses in geology and hazards analysis of Tianchi Volcano

A number of different lahars have been recognized from a systematic survey of a mapping project. The high setting temporamre feature of the deposits indicates a relationship between the lahar and the Millennium eruption event of Tianchi Volcano. The lahars caused a dramatic disaster. Recognize of the huge avalanche scars and deposits around Tianchi Volcano imply another highly destructive hazard. Three types of different texture of the avalanche deposits have been recognized. There was often magma mixing processes during the Millennium eruption of Tianchi Volcano, indicating a mixing and co-eruption regime of the eruption.     

周家塆岩体锆石年龄值及其地质意义

大别山麓前寒武纪变质岩分布区，具片麻状构造的花岗岩类分布较广。周家塆岩体即为一例。前人主要依据片麻理发育程度，以类比的声法，将这些片麻状花岗岩时代定为“大别-吕梁期”或“晋宁期”，而将周家塆岩体定为燕山早期花岗岩侵入体。这些结论，均缺乏同位素年龄数据佐证，有的也不切合地质实际，因而谬误不少。     

贯彻落实国务院《关于加强地质工作的决定》

本期“本刊特稿”栏目，我们继续刊载全省国土资源系统培训的部分内容：一是国土资源部矿产开发管理司司长贾其海和国土资源部地质勘查司副司长刘连和在培训班上的授课；二是继续选登了四位学员在培训班考试时写的“小论”，以期推进我省国土资源系统今年培训工作的完满完成。[编按]     

地质勘查事业走向市场的指导思想─—学习《邓小平文选》联系实际话改革

地质勘查事业走向市场的指导思想─—学习《邓小平文选》联系实际话改革仇水旺（湖南省地质矿产厅长沙４１００１１）关键词邓小平文选；地质勘查；改革开放；市场经济ＴｈｅＴｈｏｕｇｈｔＧｕｉｄｉｎｇｔｈｅｗｏｒｋｏｆＧｅｏｌｏｇｉｃＥｘｐｌｏｒａｔｉｏｎｔｏＳ...