Abstract
Abstract Oriented block samples of coal representing the lower layer (2.1 m) of the No. 308 coal seam were collected in the Ziemowit mine. Microscope investigations were carried out using a self-developed, fast method of maceral quantification that enables obtaining a continuous petrographical profile (“microprofile”) of a seam and computer processing of the data. The contents of macerals and maceral groups distinguished along the profile were averaged using the method of moving averages to show trends of environmental changes in a mire. The facies diagram proposed is based on an assumption that oscillations of water table in the mire affect the coal petrographical composition, while stronger water influxes into the mire increase the mineral matter content of coal. The author has identified three major types of the mire environments in which plant material was deposited during deposition of the No. 308 coal seam. These are permanently inundated = planar mire (PM) with two sub-environments—PM “margin” and PM “central”; temporarily inundated = transitional mire (TM) with two sub-environments—TM “wet” and TM “dry”; and elevated = domed mire (DM) with two sub-environments—DM “progressive” and DM “regressive”.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.