Biomarker geochemistry of marine organic matter in the Hushan and Chaohu areas,Lower Yangtze region

来源 :Chinese Journal of Geochemistry | 被引量 : 0次 | 上传用户:cyuaxl
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Marine strata are widely exposed in the Hushan and Chaohu areas, Lower Yangtze region. As biomarker geochemistry of the strata has not been well documented, this paper deals with the biomarker composition of representative samples collected from the Silurian, Carboniferous and Triassic systems and their geological implications, thus providing clues to marine organic matter. On the basis of experimental results, it is shown that abundant biomarkers (e.g. n-alkanes, isoprenoids, terpanes and steranes) were detected. As organic matter in the strata is highly to over mature in general based on petrologic microobservation, some biomarkers (mainly n-alkanes) except terpanes and steranes cannot reflect the source, depositional environment and maturity of organic matter. Thus, primarily based on analyses of the terpanes and steranes, it is suggested that organic matter in the Silurian and Carboniferous strata is derived mainly from lower organisms, while higher plants are predominant in the Triassic organic matter. This further indicates that the depositional environment may have transformed from the marine to continental facies in the Late Triassic. These results provide new evidence for the study of regional depositional evolution, and have enriched the study of biological composition of organic matter. In addition, the biomarker geochemistry of organic matter at high to over maturation stage is addressed. Marine strata is widely exposed in the Hushan and Chaohu areas, Lower Yangtze region. As biomarker geochemistry of the strata has not been well documented, this paper deals with the biomarker composition of representative samples collected from the Silurian, Carboniferous and Triassic systems and their geological implications, thus providing clues to marine organic matter. On the basis of experimental results, it is shown that promising biomarkers (eg n-alkanes, isoprenoids, terpanes and steranes) were detected. As organic matter in the strata is highly to over mature in general based on petrologic microobservation, some biomarkers (mainly n-alkanes) except terpanes and steranes can not reflect the source, depositional environment and maturity of organic matter. Thus, based on analyzes of the terpanes and steranes, it is suggested that organic matter in the Silurian and Carboniferous strata is derived mainly from lower organisms, while higher plants are predominant in the Tr This is provide provide evidence for the study of regional depositional evolution, and have enriched the study of biological composition of organic matter. In addition, the biomarker geochemistry of organic matter at high to over maturation stage is addressed.
其他文献
本文通过给予地塞米松(Dex)和糖皮质激素受体(GR)阻断剂RU38486研究GR在大鼠中性粒细胞(PMN)粘附过程中作用。结果提示:Dex可以明显抑制PMN的粘附,有浓度依赖性;在去肾上腺大鼠给予不同浓度RU38486未发现对PMN粘附有明显
目的:通过临床机械性创伤患者血清的分析,探讨血清异常蛋白与创伤患者预后的关系.方法:收集了26例创伤患者血清,按创伤严重度评分将患者分为轻度(ISS<16),中度(ISS16~25),重度(ISS≥25)三组;分别检测了其血清对正
抗角蛋白自身抗体(AK auto Ab)的研究自从其被发现以来已取得很大进展[1].我们曾经使用间接对比法和吸附试验观察过AK auto Ab对角朊细胞的作用[2],但该方法有其明显的不足,为能更客观地观察AKautoAb对角朊细胞的作用,我们应用纯化的AKa uto Ab直接观察该抗体对培养角朊细胞增殖代谢的影响。
对不同胎龄胎儿血,用石墨炉原子吸收测定钴、铬、锰;用火焰原子吸收测定锌、铜;用2,3-二氨基萘荧光法测定硒的含量,发现锌、锰从早妊到中好为逐渐增加,中妊后又逐渐减少;硒、钴、铬基本
观察了低硒组和加硒组大鼠肝去线粒体上清液(PMS)中总核糖体含量、多聚核糖体/总核糖体比值的变化。同时还测定了肝匀浆中谷胱甘肽过氧化物酶(GSH-Px)活性、核酸含量及TBA值。结果表明:低硒组大
乡土郎中走红令人忧我在农村长大,在我的印象中,乡土郎中大多没经过专门学习和培训,仅是凭祖传一技或自身摸索到的一点医道混口饭吃,充其量算个巧农民,可如今,乡土郎中真的挺走红。
目的:观察鼓膜胆碱能神经的分布及噪声对神经纤维的影响.方法:采用乙酰胆碱脂酶(AchE)特殊染色的组织化学方法.结果:(1)胆碱能神经纤维主要分布于鼓膜周围边部与锤骨柄部,少数纤维与小血管相
1月3日,邹家华副总理在听取国家统计局张塞局长关于当前统计工作中几个问题汇报时指出:统计工作是一项非常重要的工作。在社会主义市场经济条件下,统计工作不是不要,而是非常必要
当今的时代背景给教育工作者们提出了新的挑战,培养学生的创新能力成为素质教育改革中的一个重要目标。本文在简要阐述创新能力的重要性和内涵的基础上,分析了目前数学教学中在培养学生创新能力方面存在的问题,并从教育者的角度提出了相应的解决办法,以期改善当前创新能力培养不足的现状。  【关键词】数学教学;创新;培养  1 前言  在信息化、全球化高速发展的今天,各类知识和信息更新换代速度极快,让人应接不暇。党
我有一位同事,心灵手巧四个字用在他身上丝毫不为过,无论电工、木工、建筑工、水暖工他都可以手到擒来。不过,虽然他什么都会一点,但哪一行都做得不精,所以直到退休前,他都还只是后勤部的一个普通员工,每天做着杂七杂八的零碎事。  而我的一个朋友则恰恰相反:他自幼喜欢绘画,从小学开始就参加了绘画兴趣班,进入中学后则选修了美术专业,由于过人的绘画天赋和功底,他高考时以极高的专业成绩顺利考入一所著名的美术学院。