全球沉积岩数据库项目(IGCP-269)

GLOBAL DATABASE PROJECT IN SEDIMENTARY PETROLOGY(IGCP-269)

摘要:

在1988年设立了IGCP-269项目,试图借助设置的模型(prototype)数据库来检验用于沉积岩石学上的全球数据库可行性。数据库包容沉积岩的各种分析值和样本的详细资料。在个人计算机上可用对本项目来说是至关重要的,所以它也适用于发展中国家。由于研究者要获取其他地区数据来源的信息常常很困难,有必要设置地区组以汇集数据资料。一个逻辑部件相当于一个样本,并由标题程序块和内涵程序块构成。标题程序块的形式一般适用于所有类型的沉积岩,而内涵程序块对各种岩石类型是不同的。许多问题,不仅信息程序方面的技术问题,还有沉积学上的理论问题已经解决。包括检索和分析功能在内的数据库管理系统已采用几个商用软件研制出。世界上已开发了容有400件样本数据以上的模型数据库,并配置由沉积学家试验。包含巨大数量全球数据的实际数据库现在正在研制中,还要将其集成为一种认识基础,成为沉积学家研究沉积相、区、环境等方面的一种有效工具。

Abstract:

In 1988 the IGCP Project No. 269 was established to examine the feasibility of global databases in sedimentary petrology by constructing a prototype database. The database is com-posed of variety of analytical values in sedimentary rocks and sample specification data. Avail-ability on personal computers are essential for the project so that it can be used also in develop-ing countries. Regional groups were established to collect data,because it is often difficult for re-searchers outside the region to get information on data sources. A logical unit corresponds to a specimen,and it is composed of a header block and an intrinsic block. The format of the header block is common for all types of sedimentary rocks,but that of the intrinsic block differs for each rock type. Many problems were resolved,not only technical problems in information pro-cessing,but also theoretical problems in sedimentology. The database management systems,in-cluding retrieval and analytical functions were developed by using several commercial softwares. The prototype database with more than 400 sample data was developed and distributed for ex-amination by sedimentologists in the world. The actual database,which contains a large amount of global data,is now under development,and it will be integrated into a kind of knowledge base for sedimentologists as a useful tool for studying sedimentary facies,province,environment,and so on.