四川盆地天然气地球化学特征

The Sichuan Basin is one of the largest gas-oil-bearing basins in China. Oil and gas reservoirs occur in Mesozoic, Paleozoic and Proterozoic strata in this basin, with natural gases being dominant. A good wealth of data from 2,000 drill wells on the distribution of natural gases(hydrocarbons: CH4, C2H6^ ; non-hydrocarbons: H2S, CO2, N2; rare gases: He, At,Hg) show that natural gases in the basin are predominated by oil-thermoeraeked and coal-series gases.Geological-factor analysis of the geochemical characteristics of natural gases pro-vide evidence suggesting that the oceurrence of natural gases, especially dry gas, is attributed to the high maturity of organic matter, and the multi-productive formation has a great bearing on the multi-source rocks; the anomalies of some. components(e.g. H2S) are related not only to the type of primary organis matter, but also to the lithological characters of reservoir beds. Also discussed in this paper are some geochemical characteristics of coal-series and non-coal-series gases at the same degree of maturation, demonstrating that the former is characterized by high proportions of CH4, and Hg vapor, high C2/C2, ratio, high δ^13C8,low C2^ , and high iC4/nC4.     

测量不确定度的常用表示方法——平均值的置信区间

简要叙述了平均值置信区间的涵义,探讨了以±ｔｓ／√ｎ表示测量不确定度的有关问题。     

Distribution Characteristics of Alkylcyclohexanes in Lower Paleozoic Strata on the Northern Margin of the Tarim Basin,China

Organic matter from the Lower Paleozoic strata on the northern margin of the Tarim Basin of China contains abundant alkylcyclohexanes.The n-alkylcyclohexanes show the even(C16-C20) and odd (C17-C21) carbon number predominance and smooth distribution,and the methyl-n-alkylcycolhexanes the odd carbon number predominance(C17-C21) and smooth distribution,which may be related to their depositional environments and organic precursors.There are some differences in carbon number distribution between the two series of monocyclic alkanes and the n-alkanes marked by smooth distribution.The genetic relationship between the three series of compounds needs to be further studied.     

黔东南金的加里东成矿带

在贵州全省地质图上，黔东南是一块特殊的部位，与处在扬子准地台的贵州大部分地区不同，这里属于华南加里东褶皱带。区内出露的地层主要为前震旦系下江群，而震旦系，寒武系、石炭系、二叠系、三叠系、侏罗系、白垩系等则只有零星分布。其中，震旦系与前震旦系下江群、石炭系与下江群或震旦系、     

透辉石标准物质的均匀性检验及其相关问题的讨论

叙述了透辉石标准物质均匀性检验的方法和结果,确定了最小取样量。对标准物质均匀性检验中的有关问题进行了讨论。     

登封煤田白坪井田层滑构造研究

分析了登封煤田白坪井田二1煤层附近的层间滑动构造类型,探讨了其发育规律及对二1煤层的影响.此类见煤异常点的确认在资源量计算中具有重要的实际意义.     

兴多偶氮氯膦-I与铍显色反应的研究

铍的光度测定已经进行了广泛的研究。主要的显色剂有两类:三苯甲烷染料和邻羟基偶氮染料。前者主要有铬菁R和铬天青S,在表面活性剂存在下,用三元络合物光度法测定铍,有很高的灵敏度。后者有铍试剂Ⅱ、铍试剂Ⅲ和铍试剂Ⅳ等,较新的显色剂是偶氮氯膦-Ⅰ。 兴多偶氮氯膦-Ⅰ作为镁的显色剂。鉴于铍、镁同属一个主族,外层电子结构相同,故本文首次研究了兴多偶氮氯膦-Ⅰ与铍的显色反应。 在pH5的六次甲基四胺缓冲溶液中,     

关于抓取法採樣問題的研究

(一) 一般的敍述一、取样方法的种类及其实質 現在的取样方法有全巷法,打眼法,抓取法,剝层法,刻槽法,方格法等六种。取样的正确与否取决于取样的数量与取样点的分佈范圍。以下試从这一角度來分折一下各种取样方法的实質。 1.全巷法取样就是在一定地段將爆落矿石全部或选取其1/5—1/10来作为样品。 2.打眼法取样就是用集尘器在凿岩过程中收集岩石的尘泥作为样品。 3.抓取法取样就是在掌子面放砲后在崩落的矿石堆上     

川北阿坝地区三叠系粘土矿物特征及地质意义

分析了川北阿坝地区三叠系泥质岩的岩石矿物组合、粘土矿物类型、伊利石结晶度和镜质体反射率特征,并以此划分成岩演化阶段及变质程度。以成岩作用—极低级变质作用的研究方法,明确了阿坝地区成岩作用及极低级变质作用的上、下界限及区域分布规律:以唐克为中心的地区处于成岩作用晚期阶段,成岩作用温度200～212℃,伊利石结晶度IC≥0.42;周围地区处于极低级变质作用阶段,成岩作用温度212～222℃,伊利石结晶度ICRo)也具有同样的演化规律。对该地区域上成岩演化的差异及原因作如下解释:由于构造活动的远近程效应存在差异,该地区的周缘明显受到构造作用的影响,因叠加动力变质而达到极低级变质作用阶段;唐克位于阿坝地块中心,受构造作用的影响相对较小,因而处于成岩作用晚期阶段。     

河南省淅川县后湾钒矿床地质特征、矿床成因及找矿方向

南秦岭褶皱带东段下寒武统水沟口组底部的一套黑色硅质岩及泥岩组成本区钒矿带,钒矿床严格受控于地层.后湾钒矿区位于荆紫关 - 师岗复向斜北翼,本文重点讨论该矿床的地质特征、矿床成因、找矿标志及找矿方向.