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首页> 外文期刊>Oil Shale >CHARACTERISTICS AND ACCUMULATION OF MIDDLE JURASSIC OIL SHALE IN THE YUQIA AREA, NORTHERN QAIDAM BASIN, NORTHWEST CHINA
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CHARACTERISTICS AND ACCUMULATION OF MIDDLE JURASSIC OIL SHALE IN THE YUQIA AREA, NORTHERN QAIDAM BASIN, NORTHWEST CHINA

机译：中国西北地区北柴达姆盆地玉器地区中侏罗索油页岩的特点及积累

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摘要

Two oil shale sequences in the Middle Jurassic Shimengou Formation in the Yuqia area, northern Qaidam Basin in Northwest China were evaluated based on geochemical and proximate analyses. The characteristics and accumulation conditions of oil shale in the Lower Coal-bearing Member (J(2)sh(1)) and Upper Shale Member (J(2)sh(2)) are different. The oil shale in J(2)sh(1) with a high, terrigenous organic matter (OM)-derived total organic carbon (TOC) content is of medium-high oil yield, low ash and moisture contents, and low-medium calorific value and sulfur content. The oil shale in J(2)sh(2) having a medium, alginite and bituminite-originated TOC content is characterized by a low-medium oil yield, high ash content, and low calorific value and moisture and sulfur contents. The oil shale in J(2)sh(1) was deposited in a limnic environment under a varied climate from hot-humid to warm-humid, whereas that in J(2)sh(2) was deposited in a semi-deep and deep lake environment under a stable warm-humid climate. Climatic conditions may have controlled the quality, distribution and thickness of oil shale by influencing the origin of organic matter and sedimentary environment. High paleoproductivity in J(2)sh(2) (or high terrigenous detrital matter input in J(2)sh(1)) and strong water salinity stratification are responsible for the accumulation of high-quality oil shale.
机译：中国西北地球化学和近期分析评估了玉器地区中侏罗斯岛地区中侏罗索地区中侏群地区中侏群地区的石油页岩序列。下煤轴承构件中油页岩的特性和累积条件（J（2）SH（1））和上部页岩构件（J（2）SH（2））是不同的。 J（2）SH（1）中的油页岩具有高，有机物（OM）的总有机碳（TOC）含量是中高油产量，低灰分和水分含量，低介质热量价值和硫含量。具有培养基，藻石和沥青菌素源TOC含量的J（2）SH（2）中的油页面的特征在于低介质油产量，高灰分含量和低热值和水分和硫含量。在J（2）SH（1）中的油页岩在来自热潮湿的多种气候下的气候环境中沉积在气氛中，而在J（2）SH（2）中沉积在半深度和深湖环境下稳定的温暖潮湿的气候。气候条件可能通过影响有机物质和沉积环境的起源来控制油页岩的质量，分布和厚度。 j（2）sh（2）的高古生植物效力（或在j（2）sh（1）中的高土酥皮物质输入）和强水资源盐度分​​层负责高质量的油页岩的积累。

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