Coal Petrologic Investigation of Tropical Peat Deposits

热带泥炭矿床的煤岩学调查

• 批准号: 8904208
• 负责人: Arthur Cohen
• 金额: $ 13.86万
• 依托单位: University of South Carolina at Columbia
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-06-01 至 1992-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8904208&HistoricalAwards=false
• 关键词: Coal; Petrologic; Investigation; Tropical; Peat

The purpose of this research is to investigate the petrographic and palynologic characteristics, surficial processes of formation, and early stages of coalification (peatification) of several contrasting wet-tropical, peat deposits in the Caribbean region. This data will be compared and contrasted with data generated previously from temperate settings, such as the Okefenokee Swamp of Georgia, and Snuggedy Swamp of South Carolina. Three tropical deposits have been selected for study: 1) the Moin Deposit of Costa Rica; 2) the Changuinola Deposit of Panama; and 3) the Arecibo Deposit of Puerto Rico. Although all of these are found in the same general type of setting, each exhibits one or more significant differences from the others and was selected because it is expected to yield new and essential information with which to interpret and predict the composition and geometry of the many ancients coals that have been reported in the literature to have formed in tropical shoreline-related settings. Methodology to be employed in this study will include: 1) field measurements of pH, salinity and other surface conditions; 2) field descriptions of peat sequences; 3) collection of surface litter and surface samples; 4) collection of oriented piston cores; 5) transmitted, reflected, and fluorescent light microscopy from microtome thin sections; 6) low temperature ashing and x-ray analysis of surface and subsurface samples combined with radiocarbon dating, for interpreting the paleoecological and developmental history of the deposits.

本研究的目的是调查 岩相学和孢粉学特征，表面作用 和煤化作用（泥炭化作用）的早期阶段 几个对比鲜明的湿热带，泥炭沉积在 加勒比区域。 这些数据将与 以前从温带设置生成的数据，例如 格鲁吉亚的奥克弗诺基沼泽和南斯努格迪沼泽 卡罗莱纳。 选择了三个热带矿床进行研究：1） 哥斯达黎加的Moin存款; 2）哥斯达黎加的Changuinola存款 巴拿马; 3）波多黎各的阿雷西博存款。 尽管所有 这些都是在相同的一般类型的设置，每个 表现出一个或多个与其他人的显著差异， 被选中是因为它有望产生新的和必要的 用来解释和预测成分的信息 和几何学的研究， 与热带海岸线有关的 设置. 本研究将采用的方法包括：1） 实地测量pH值、盐度和其他表面状况; 2)泥炭层序野外描述; 3）地表采集 垃圾和表面样品; 4）收集定向活塞 核心; 5）透射，反射和荧光 显微镜从切片机薄切片; 6）低温 表面和地下样品的灰化和X射线分析 结合放射性碳年代测定， 矿床的古生态和发育历史。