Seelyville Coal Member Thickness 2011

In the past a series of reports on coal resources of selected counties in Indiana was published as part of the Special Report series of the Indiana Geological Survey. These reports included maps showing thickness of the Seelyville Coal Member (Linton Formation, Pennsylvanian). The thickness maps were based on coal-test records, mine-map notations, and interpretations of geophysical logs that are included in the files of the Indiana Geological Survey. Different thickness ranges were used in the various counties and for different purposes. Since 1980, staff members of the Indiana Geological Survey (IGS) have also collected and entered coal resource information into the NCRDS database as a cooperative project with the U.S. Geological Survey (USGS). The purpose of NCRDS database is to provide a means of rapid retrieval of point-source coal resource information, including coal location, thickness, depth, and other parameters. Based on all available data as of October 2010, a new map of Seelyville Coal Member thickness was created. It is the most current thickness map of the Seelyville Coal Member. Because additional data on coal thicknesses are obtained by the Indiana Geological Survey on an annual basis, interested users may wish to contact the Indiana Geological Survey for information on these more up-to-date sources.此前，印第安纳州地质调查局（Indiana Geological Survey, IGS）以其特刊系列的形式，刊发了一系列针对印第安纳州部分县域煤炭资源的研究报告。此类报告包含宾夕法尼亚统（Pennsylvanian）林顿组（Linton Formation）西利维尔煤段（Seelyville Coal Member）的厚度分布图件。该类厚度图的编制依据涵盖煤炭勘探测试记录、矿井图注记，以及印第安纳州地质调查局档案中收录的地球物理测井解释成果。针对不同县域与不同应用场景，采用了差异化的厚度分级标准。自1980年起，印第安纳州地质调查局（Indiana Geological Survey, IGS）工作人员与美国地质调查局（United States Geological Survey, USGS）合作开展项目，将采集到的煤炭资源信息录入国家煤炭资源数据系统（National Coal Resource Data System, NCRDS）数据库。该数据库的设计目标为实现点源煤炭资源信息的快速检索，涵盖煤炭点位位置、厚度、埋深及其他相关参数。基于截至2010年10月的全部可用数据，编制了全新的西利维尔煤段厚度分布图，此为当前最新的该煤段厚度图件。由于印第安纳州地质调查局每年都会新增煤炭厚度相关数据，有需求的用户可联系该局获取此类最新数据源的相关信息。