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Sinian strata (isotopic ages ranging from 1900-850 m.y.) in Oihsien, county and its vicinity have been studied in more detail from the standpoint of sedimentary geochemistry. Average chemical composition of various sedimentary rocks in the Sinian sequence (sandstone, siltstone, shale, dolomite and limestone) have been calculated.The periodicity and general trend as exhibited in the course of evolution of element association have been demonstrated by mathematical statistics based on numerious chemical analyses and semiquantitative spectroscopic data with the aid of electronic computer. In accordance with the above results the classification of elements are proposed on a more reasonable ground. Considerable attention has been paid to the periodicity and evolutionary eharacterictics of rocks, minerals and elements. The mode of occurrence of elements is examined in the light of trace-element concentrations and the relative coefficients between them in different components (clastic debris, clay, and ete.) from a variety of rocks and carbonates. Finally, the relationship between background abundances of elements and mineralization, and the effect of submarine eruption on sedimentation and the enrichment of some elements, for example, K, St, Mn, B, P, Pb and Zn, have also been dealt with. 相似文献
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为了解震旦地层内元素组合的演化和元素的相关关系,将大量分析数据(化学及光谱半定量分析)进行了电子计算机处理。下面分别讨论分析方法和计算结果。 相似文献
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旅大6构造是渤海海域新近发现的一个中型油田.该构造位于辽东低凸起中南段陡坡带,为层状构造油气藏,垂向上多层系含油,形成典型的“阶梯式”陡坡带复式油气藏.走滑作用对构造形成、储层发育、断层封堵、油气运移都有重要的作用.构造转折端对沉积卸载形成优质储层具有重要作用,奠定了旅大6构造是辽东低凸起中南段有利成藏区的物质基础;辽中一号断层与区域走滑断层同向,具有走滑压扭性质是控圈断层侧封的关键.南北区块以及东二下段、东三段油气丰度迥异,伸展断层的运移能力和控圈断层的封堵能力共同决定了旅大6构造南区东二下段油气的差异富集成藏. 相似文献
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北黄海盆地东部坳陷中生界砂岩以细砂-粉砂岩为主,夹少量砂砾岩,岩石学类型以长石砂岩、长石岩屑砂岩为主,储集空间以次生溶蚀孔及裂缝为主,孔喉结构为细小孔隙、细喉-微细喉,属于低孔低渗储层。通过对物性影响因素分析,发现裂缝、沉积相带、成岩作用是控制本区砂岩储层质量的主要因素。 相似文献
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对于活塞压力计,零级有效面积是其最重要的参量。利用作为压力基准级活塞压力计活塞-活塞筒几何尺寸的测量结果,用几何法计算活塞压力计的零级有效面积和不确定度,活塞压力计零级有效面积计算结果为1961.0276 mm^2,其扩展不确定度为4.3 ppm(k=2,1 ppm=10^-6);用压力平衡法获得活塞零级有效面积的结果为1961.0279 mm^2,其扩展不确定度计算结果为1 5 ppm(k=2);用几何法获取活塞零级有效面积的不确定度最小,活塞零级有效面积为1961.0276 mm^2。 相似文献
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我队山地工作自56年组成开工以来,随着队勘探任务相应的发展,分别在三里寨、张庄、塞庄、梁洼煤矿和边庄张八桥铝矿、鲁山舞阳铁矿等完成重型山地工作竖井,采大样两个,掘进493.10公尺,斜井采样一个,掘进329.20公尺。轻型山地工作浅井120个,爆破掘进1253公尺(浅井最深达21.50公尺),槽探 相似文献
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