西秦岭南亚带太阳顶群硅质岩的岩石学及沉积地球化学研究     

董维金 《地质地球化学》1991,(5):J041-J041,F003

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云南星云湖现代沉积物的X射线照像研究     

赵永胜  赵霞飞 《成都地质学院学报》1991,18(4):76-80,T001

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成岩作用中蒙皂石向伊利石转化的化学动力学模型及其意义     

关平 《地球化学》1991,(2)

文中建立了一个化学动力学模型,以描述成岩过程中蒙皂石向伊利石转化的反应:提出了“平均加热温度”的概念,以利于模型的计算;模型与实测吻合良好,并通过模型算出了沉积速率,其结果与地质估计的相吻合。  相似文献   

广西中三叠世沉积特征与微细粒金矿的探讨     

方道年 《南方国土资源》1991,(3)

广西中三叠世沉积盆地是一个受晚古生代以来继承性断裂控制的断陷盆地。下段百逢组及上段河口组,沉积了一套以陆源碎屑为主的半深水—深水盆地相重力流沉积,以浊流沉积为主体,其中局部地区夹少量水下泥石流及等深流沉积。浊流呈海底扇式分布,面积广、厚度大,一般200—3000余m,大者近万m。浊积岩鲍马层序发育、岩石颗粒较细、底面构造发育,水平和垂直方向具有岩层并层和层厚、粒度有规律变化。桂西广大地区多处于浊积扇的中扇及外扇部份。岩石中蕴藏着丰富的微细粒型金矿。 该区地表岩石含金不高,接近于地壳的平均含金丰度,但金常沿一些同沉积断裂带附近分布,与黄铁矿等硫化物关系密切,附着这些矿物表面,金的形成与富集,是由于地下热水携带着地下基性岩石、火山碎屑岩及其他含金岩石的金元素,沿着断裂由深处向浅处运移,并受到浊积岩中泥质岩、含泥质较高的岩石阻挡,使其逐步停止流动,金元素随硫化物一起充填于细粒岩石孔隙中被吸附交代。有的地段富集成矿床。因此,深入研究广西中三叠世沉积海盆的形成、演化及沉积作用,对找寻微细粒型金矿有着十分重要的意义。  相似文献   

漂砂面：一种被忽视的界面类型     

Clem.  LB 高莉玲 《海洋地质译丛》1991,(3):68-71

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华北陆台上一个大型沉积盆地古生界油气的形成与演化     

范璞王有孝  荣光华申岐祥 吕德宣 《地球化学》1980,(2):148-159

Based on the studies of geological history during the Paleozoic time. depoaitional esvironment, the evolution of organisms, the content of organic substances and the distribution of oil-generatlng strata, various indicators concerning oil generation are discussed and. compared in terms of Organic substance composition, the alkane and isopronoid in saturated hydrocarbon, characteristic functional group of the aromatic hydrocarbon and its structure, element composition and free radical concentration in asphaltene as well as carbon isotopes. The following conclusions can be drawn: (1) During the Later Paleozoic, the mud stone of the two oil-generating depressions of the Ponhsi Group on the western part of the basin was the most important reservoir and the black mud stone and limestone were secondary in importance. (2) Both the Ordovicoan Machiakou limestone and the shale of grapholithic facies are main oil (gas) generating strata in the western part of the basin. The Changhsia Group of the middle Cambrian system may also be oil-generatlng but is of little consequence. (3) Oil and gas formation in the Upper and. Lower Paleozoic groups represent two. different evolutionary stages. In the Upper Paleozoic group the petroleum formed is a kind of light oil, and large quantities of natural gas had been formed from the coal-bearing Taiyuan and Shansi Groups as a result of metamorphism. In response to the action of temperature and. presses over the prolonged geological period, oil sad gas formation in the lower Paleozoie group corresponds to a more advanced evolutionary stage, during which the generation of natural gas is the dominant process in comparation with oil condensation. Therefore the lower Paleozoic group is believed to be more promising for gas prospecting.  相似文献   

沉积有机氮的来源和成岩作用     

Baxby  M 朱扬明 《地质科学译丛》1995,12(4):55-62

这篇文章是有关沉积有机持（ＳＯＭ）中氮的保存和围变作用认识的概述，内容着重于油气形成体系，但也涉及到煤。  相似文献   

南顿巴斯煤层煤岩成分与同沉积期地质构造的关系     

ж.  ГГ 知叶 《国外煤田地质》1993,(3):4-6

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兰村煤矿沉积体系特及其对含煤性的控制     

刘正根 《湖南地质》1995,14(2):76-78

攸县兰村煤矿区晚二叠世的充填沉积，可划分为滨海粉砂游泥盆地、海湾泻湖、三角洲、障壁坝－泻湖浅海钙泥质台地等５个沉积体系。本文分析了海进海退旋回对沉积体系含煤性的控制。  相似文献   

从石油工程师的角度看辫状河流冲积物油气藏     

Mart.  JH  韩如 《国土资源信息化》1995,(7):33-34

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