Springfield Coal Member Elevation 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 (IGS). These reports included maps showing elevation of the Springfield Coal Member (Petersburg Formation, Pennsylvanian). The elevation 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 elevation 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, elevation, depth, and other parameters. Based on all available data as of October 2010, a new map of Springfield Coal Member elevation was created. It is the most current elevation map of the Springfield Coal Member. Because additional data on coal elevations are obtained by the Indiana Geological Survey on an annual basis, interested users may wish to contact the IGS 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）将其针对印第安纳州部分县域煤炭资源的系列研究成果，纳入该局专题报告系列正式发表。上述报告均附有展示斯普林菲尔德煤段（宾夕法尼亚系彼得斯堡组）海拔高程的专题地图。此类高程地图的编制依据包括印第安纳州地质调查局档案中留存的煤炭勘探测试记录、矿井图注记，以及地球物理测井解释成果。针对不同县域与不同应用场景，该系列报告采用了差异化的高程值域划分标准。自1980年起，印第安纳州地质调查局（IGS）工作人员与美国地质调查局（USGS）合作开展项目，将收集到的煤炭资源信息录入NCRDS数据库。NCRDS数据库的设计目标是实现点源式煤炭资源信息的快速检索，涵盖煤炭点位坐标、海拔高程、赋存深度及其他相关参数。基于截至2010年10月可获取的全部数据，研究团队重新编制了斯普林菲尔德煤段海拔高程地图，这也是当前最新的斯普林菲尔德煤段高程专题图件。鉴于印第安纳州地质调查局每年都会获取新增的煤层高程数据，有需求的用户可联系IGS获取此类最新数据源的相关信息。