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断陷盆地煤与油页岩共生组合发育特征

发表时间:2015-06-30  浏览量:1727  下载量:645
全部作者: 王东东,李增学,吕大炜,刘海燕,王平丽,冯婷婷
作者单位: 山东省沉积成矿作用与沉积矿产重点实验室,山东科技大学地球科学与工程学院
摘 要: 研究了断陷盆地煤系中煤与油页岩共生发育的组合类型、成矿机理及其赋存规律。通过实地调研、实验测试、镜下观测、岩心柱状、构造演化等方面的研究与对比,发现断陷盆地煤系内煤与油页岩直接接触的共生组合主要有4种类型(地层自上而下):煤层/油页岩组合(C-OS)、油页岩/煤层组合(OS-C)、油页岩/煤层/油页岩组合(OS-C-OS)和煤层/油页岩/煤层(C-OS-C)组合;成煤物质和油页岩成矿物质差异较大,但存在重叠的部分,特别是两种矿层的过渡部位,有机质类型、百分含量等均呈现出过渡状态;盆地背景构造演化控制了盆地充填的整体特征,提供了煤与油页岩共生的外部条件,而断陷盆地的幕式构造活动与盆地背景构造演化导致盆地水域体制的变化,使得盆地物质基础、沉积环境等均发生改变,从而导致成煤环境与油页岩成矿环境的旋回式发展;古气候特征则决定了煤与油页岩成矿原生物质的发育。研究发现,断陷盆地中构造演化、沉积相、古气候、成矿物质、水体性质等差异性,造成了煤与油页岩共生组合的类型、厚度、品质等特征的差异性。
关 键 词: 沉积学;煤与油页岩共生组合;比较研究;断陷盆地
Title: Development characteristics of coal and oil shale symbiotic combination in graben basin
Author: WANG Dongdong, LI Zengxue, LÜ Dawei, LIU Haiyan, WANG Pingli, FENG Tingting
Organization: Key Laboratory of Sediment Mineralization and Sediment Mineral, College of Earth Science and Engineering, Shandong University of Science and Technology
Abstract: Graben basin coal and oil shale symbiotic combination types, metallogenic mechanism and occurrence law were studied in this paper. By studying and comparing many factors, such as on-the-spot investigation, experimental test, the microscopic observation, core column, tectonic evolution, results are found. There are four main types of direct contact symbiotic combination of coal and oil shale as follows (strata from top to bottom): coal/oil shale combination, oil shale/coal combination, oil shale/coal/oil shale combination and coal a/oil shale/coal combination. Coal-forming material and oil shale ore-forming material are different, but they have overlapping parts, especially at the transition area the organic matter type along with the percentage of them presents a transition state. Background of the basin tectonic evolution controls the overall characteristics of the basin filling to provide the external condition of coal and oil shale symbiosis while the episodic tectonic activity of the fault basin and basin tectonic evolution background lead to the change of the basin water system, making the basin material basis, sedimentary environment change and leading to a cycle from coal and oil shale metallogenic environment development. Ancient climate characteristics determine the development of coal and oil shale metallogenic raw material. We find that in graben basin, the differences of tectonic evolution, sedimentary facies, ancient climate, ore-forming materials and property of water phase, lead to different combination type, thickness and quality characteristics of coal and oil shale symbiotic combination.
Key words: sedimentology; coal and oil shale symbiotic combination; comparative study; graben basin
发表期数: 2015年6月第12期
引用格式: 王东东,李增学,吕大炜,等. 断陷盆地煤与油页岩共生组合发育特征[J]. 中国科技论文在线精品论文,2015,8(12):1252-1262.
 
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