Research And Application Of Spatial Data Model In Tectonic Evolution And Metallogenic Laws-Taxkorgan-Tianshuihai Massif

With the development of GIS theory and technology system,the information revolution in China’s geological field is proceeding step by step.As the sources,formats and types of information become more and more diverse,it is necessary to conduct in-depth research and analysis on a large number of complex and interrelated information content.Based on GIS technology,Taxkorgan-Tianshuihai Massif is selected as the research object,and the spatial data model of tectonic evolution and metallogenic regularity is built as the basic requirement.According to the spatial data and attribute data of basic geological data,the "structured" spatial data model is established for the study area,and the corresponding database is established.Improve data storage,processing,retrieval,analysis and efficient mapping technology based on spatial database.The main contents and achievements of this paper are as follows:1.Taking the basic geological data of Taxkorgan-Tianshuihai Massif as the object,the data characteristics are analyzed,and the basic contents of the spatial database construction of structural evolution and metallogenic regularity,such as data integration content,classification rules,data structure and constraint rules,are studied.A multi-perspective hierarchical and structured spatial data model of tectonic evolution and metallogenic regularity is constructed by using structured system design method.Logic models of topographic geographic data,geophysical data,remote sensing data,geological-geochemical data,20 object-class physical models,24 element-class physical models and 14 "domains" are established.The concepts,ranges,data types,coding and naming rules,topological consistency rules,stratigraphic division of spatial data and attribute data structure of spatial and attribute data of tectonic evolution and metallogenic regularity are studied,and 188 types of geological bodies and 2742 geological bodies are coded、setting topology rules for 13 element-classes.It is applied to the design of spatial database of tectonic evolution and metallogenic regularity.2.A spatial database of tectonic evolution and metallogenic regularity of the Taxkorgan-Tianshuihai Massif is established to improve the storage,processing,retrieval,analysis and efficient mapping techniques and methods of massive basic geological data.3.Taking Taxkorgan-Tianshuihai Massif as an example,this paper applies it in three aspects: basic geology,tectonic evolution and information extraction of metallogenic regularity.From the point of view of mineral resources potential prediction application,taking the Chalukou-Shenxianwan Lead-Zinc Ore Deposit Belt as an example,combined with WLR model and Logistic regression model,it is predicted that there are two in category I,two in category II and one in category III in five prediction areas.At the same time,the availability and validity of the spatial database of tectonic evolution and metallogenic regularity are verified.