SEDBA在沉积学中的应用:信息不足、需要垂向岩性剖面和沉积构造序列

ＩＧＣＰ—２６９—ＳＥＤＢＡ项目──全球沉积岩数据库是一个对沉积学有很大价值的极好国际项目．以挑剔的眼光来看待这一数据库时，发现ＳＥＤＢＡ的信息不足；需要改进。这些不足包括：（ｌ）信息空间不足；（２）信息含糊；（３）信息的分类整理不当；（４）缺乏对信息的详细分类；（５）无关的和不需要的信息。其次，ｓＥＤＢＡ仅局限于沉积岩。为了将ｓＥＤＢＡ应用于沉积学，使其更为有用、更具意义，有必要进行一些改进。这些改进包括：（ｌ）岩性图和岩相图ｏ（２）盆地构造一沉积演化阶段图；（３）盆地构造图；（４）补充垂向岩性剖面和岩性测井记录；（５）沉积构造序列；（６）该地区的地质剖面；（７）其它重要图片。

APPLICATION OF SEDBA TO SEDIMENTOLOGY: DEFICIENCIES OF INFORMATION AND NEED OF VERTICAL PROFILES OF LITHOLOGY AND SEQUENCES OF SEDIMENTARY STRUCTURES

Project IGCP-269-SEDBA,a Global Database in Sedimentary Petrology is a wonderful in-ternational project that would be of immense value to sedimentology. While examining the database critically it was observed that there are some deficiencies of information in SEDBA and need rectification. Deficiencies are regarding(1)insufficient space for information,(2)ambiguity in information,(3)improper arrangement of information,(4)lack of further subdivision of infor-mation and(5)irre]evant and unnecessary information. Secondly,SEDBA is restricted to sedi-mentary petrology only. To apply SEDBA to sedimentology some modifications are essential to make it more useful and meaningful. These modifications may be regarding inclusion of(1)litho-logical and Lithofacies maps,(2)diagrams and figures showing stages of tectono-sedimentary evoloution of the basin,(3)maps and diagrams showing basin configuration,(4)provision for vertical profiles of lithology and lithologs,(5)sequences of sedimentary structures,(6)geological cross-sections of the area and(7)other important figures and photographs.