Springfield 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 Springfield Coal Member (Petersburg 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 utilized 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. Base on all available data as of October 2010 a new map of Springfield Coal Member thickness was created. It is the most current thickness map of the Springfield 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）特刊系列曾刊发一系列针对印第安纳州选定县域煤炭资源的研究报告。上述报告中附有展示斯普林菲尔德煤段（Springfield Coal Member，属宾夕法尼亚系Pennsylvanian彼得斯堡组Petersburg Formation）厚度的专题图件。该类厚度图件的编制依据为印第安纳州地质调查局档案中留存的煤炭勘探测试记录、矿山图注记以及地球物理测井解释成果。不同县域及不同应用场景下所采用的厚度分级标准存在差异。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（U.S. Geological Survey, USGS）合作开展项目，将采集到的煤炭资源信息录入NCRDS数据库。NCRDS数据库的设计目标为实现点源型煤炭资源信息的快速检索，涵盖煤炭点位、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，研究人员编制了全新的斯普林菲尔德煤段厚度专题图，该图为当前最新的斯普林菲尔德煤段厚度分布图。由于印第安纳州地质调查局每年都会获取新的煤炭厚度相关数据，有需求的用户可联系该局以获取此类最新数据源的相关信息。