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Sedimentological and organic geo-scientific studies on geological behavior of geo-organic substances

地质有机物质地质行为的沉积学和有机地球科学研究

基本信息

批准号：
03403010
负责人：
MURAE Tatsushi
金额：
$ 25.15万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (A)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1994
项目状态：
已结题

项目摘要

The purpose of this research is to read earth-scientific information provided by the organic matters derived from extinct organisms which have been preserved in sedimentary rocks. In order to achieve this aim, we conducted following studies : (1) observations of coal and coal-bearing sediments by the naked eye, (2) observations of the fine structure of dispersed coaly-plant fragments in general sediments and analyzes of their characteristic fluorescence using an almighty microscope equipped with a fluorescence spectrophotometer, (3) examinations of characters of organic geosamples using a microscopic FT-IR and a pyrolysis GC-MS.On the basis of the combined information obtained by above examinations, we characterized the organic geosamples and elucidated earth conditions which altered the characters of the geosamples.We could obtain more detailed information on the thermal history of sedimentary faces by examinations of resinites, macerals derived from resin of paleoplants, using FT-IR and pyrolysis GC-MS.Although vitrinite-reflectance measurement alone indicates the thermal history of the sediment as a results multiplied by maximum temperature and effective heating period, additional examinations by infrared spectroscopic methods and pyrolysis GC-MS to the reflectance measurements made it possible to discuss details of the temperature factor and time factor more clearly showing the local difference of heating rate in the accretionary prisms in the Japan arc.We could discuss clearly on the movement of organic matter in high-organic limestone, which was considered to be significantly related with petroleum formation, by adding information obtained using pyrolysis GC-MS to microscopic observations.We disclosed the resemblance between the chemical structure of the extraterrestrial kerogen-like matter in carbonaceous chondrites and that of coal samples in a certain maturation level.

这项研究的目的是阅读从保存在沉积岩中的灭绝生物中提取的有机质提供的地球科学信息。为了实现这一目标，我们进行了以下研究：(1)用肉眼观察煤和含煤沉积物；(2)用配备荧光分光光度计的万能显微镜观察一般沉积物中分散的煤植物碎片的精细结构并分析其特征荧光；(3)用显微FT-IR和热解GC-MS检测有机地质样品的特征。我们对有机地质样品进行了表征，阐明了改变地质样品特征的土壤条件。通过FT-IR和热解GC-MS对古植物树脂显微组分的检测，我们可以获得更详细的沉积面热史信息。尽管仅镜质组反射率测量就表明了沉积物的热史，但乘以最高温度和有效加热时间，通过红外光谱和热解GC-MS对反射光谱的分析，可以更清楚地讨论温度因素和时间因素的细节，揭示出日本弧吸积棱柱中升温速率的局部差异。通过将热解GC-MS获得的信息添加到显微镜观察中，可以清楚地讨论与油气形成密切相关的高有机质灰岩中有机质的运动。我们揭示了碳质球粒陨石中类地外干酪根物质的化学结构与一定成熟度的煤样的相似之处。