灌县九甸坪上古生界地层剖面及岩石地层单位的划分

四川灌县九甸坪剖面横切龙门山的懒板凳飞来峰。文章根据岩石特征、古生物特征对该剖面进行了岩石地层单位的划分，从中识别出下泥盆统甘溪组、上泥盆统茅坝组及下石炭统总长沟组，并与邻区相应地层进行了对比。     

桂林唐家湾地区上泥盆统桂林组碳酸盐岩微相

广西桂林唐家湾地区上泥盆统桂林组发育8种微相类型,即灰泥岩、球粒-泥粒岩/颗粒岩、生物屑粒泥岩、棘皮-泥粒岩、枝状层孔虫-颗粒岩、层孔虫-棘皮-泥粒岩/颗粒岩、枝状层孔虫-棘度-泥粒岩/漂砾灰岩、鲕粒-球粒泥粒岩/颗粒岩。由于海平面变化及水体盐度变化形成3种沉积旋回类型。桂林组碳酸盐岩是在地形平坦的浅水台地或台隆上沉积的。由于受台盆相间的古地理格局的控制,只出现过短暂的风暴潮高能沉积,并导致生物组合分异度低。     

四川盆地东南部小河坝组优质储层的形成机制

探讨四川盆地东南部下志留统小河坝组砂岩形成优质储层的控制因素及形成机制.以野外剖面测量为基础,通过孔渗分析、薄片鉴定、阴极发光及扫描电镜等手段,结合前人的研究成果,对小河坝组海相碎屑岩的储层形成机制进行分析.认为沉积微相控制了储层形成的先决条件,水下分流河道和远砂坝主要沉积了一套粉砂岩,具有形成储层的先天条件;而分流间湾主要沉积了一套泥岩或粉砂质泥岩,不能形成储层.生烃中心对小河坝组储层具有重要的控制作用,砂岩中沥青的含量与生烃中心的距离具有明显的负相关性.岩性在纵向上的叠置关系也是影响储层形成的重要因素,具有砂泥互层的地层结构,因砂岩不易压实和胶结,可形成相对较好的储层;而厚层的砂岩因压实和胶结作用严重,反而难以形成好的储层.     

中扬子北部上震旦统陡山沱组沉积特征及演化

中扬子区上震旦统陡山沱组中下部为一大套灰黑色、黑灰色泥页岩,且大部分地区深埋地腹,具有较好的页 岩气勘探潜力。基于钻井岩芯及野外剖面测量观察,开展了系统的基础地质研究,建立了陡山沱组区域地层格架,进 行了层序和沉积相分析。上震旦统陡山沱组岩性具有四分特征,钻井岩芯和实测剖面各分段的岩性特征和沉积厚度 有所不同,地层厚度在90∼250 m,总体上呈东西走向展布,即自北西向东、南逐渐增厚的趋势。将陡山沱组划分为一 个二级层序（SS1）,其中包含4 个三级层序（SQ1、SQ2、SQ3、SQ4）。沉积相包括滨岸潮坪相和台地相,台地相划分为 开阔台地、局限台地和台内盆地3 类亚相。陡山沱期,研究区整体上为台地相沉积,区内东南部为开阔台地沉积,西北 部为局限台地,西南部花鸡坡-X1 井-九里垭一带为相对深水的台内盆地相沉积。     

四川盆地中二叠统栖霞组沉积相展布及勘探意义

通过对四川盆地中二叠统栖霞组盆缘野外剖面、岩芯详细观察,结合地震、测井等资料研究分析,建立标准岩性、古生物地层剖面,识别相标志,将沉积相划分为开阔台地相、台地边缘相、斜坡相及盆地相,在平武-茂汶-小金一带识别斜坡相和盆地相,川西地区发育台地边缘滩相带,川西-川中隆起带为开阔台地相台内滩亚相发育带;川北-蜀南低隆带为开阔台地相开阔海和台内滩亚相;川东地区为开阔台地相台内浅洼亚相。区域地层对比及沉积相展布表明,二叠系沉积前古地貌控制栖霞组沉积格局,加里东古隆起地貌及川西裂陷盆地发育共同控制川西地区栖霞组台地边缘相展布。栖霞组台缘相带发育规模相控白云岩储层,与下寒武统优质烃源层形成良好源储匹配关系,栖霞组台缘相带是深层海相碳酸盐岩重点勘探领域,泥盆系-二叠系具有相同源储匹配关系,具备发育大型构造岩性圈闭气藏的地质条件,推覆体下盘发育大型隐伏构造高带,是整体勘探、立体勘探重要有利区带。     

平驿铺组陆源碎屑岩的组构特征及其变化规律研究

分布在四川平武平驿铺一带的下泥盆统下部的砂～砾岩层顶、底出露齐全,反映该地史时期地壳运动状态的陆源碎屑建造类型在我国南方具有广泛的代表性,属同期沉积地层的标准剖面,早为地质学界公认并命名为“平驿铺组”——(D_1P)。平驿铺组陆源碎屑岩的物质组分、结构自下而上呈现有规律的变化,反映了本区早古生代末,晚古生代早期地壳运动状态及其沉积相的基本特征。     

滇西施甸中、下泥盆统斜坡相沉积特征

滇西施甸下泥盆统沙坝脚组和中泥盆统松林沟组、何元寨组具有典型斜坡相沉积特征,由三个主要沉积单元组成:a.由半远洋沉积含有光壳竹节石、笔石、菊石等浮游生物的薄层泥晶灰岩、泥灰岩、页岩组成;b.由碎屑流和变密度颗粒流形成的砾屑灰岩;c.在松林沟组中出现有滑塌层及变形构造。     

美国东克拉马斯山脉石炭系Bragdon组沉积相和物源区分析

美国加利福尼亚州东克拉马斯山脉上泥盆统■到下石炭统Bragdon组上部含有近3km(构造厚度)的砂岩、泥板岩和砾岩,它们是沉积在一个“混杂的”海底扇环境的浊积岩。详细的沉积相和岩石学研究时盆地发育和物源区分析提供了新的资料,并有助于推新晚泥盆世-早石炭世岛弧的古地理和沉积背景。     

西准噶尔白碱滩北部太勒古拉组深水沉积研究

论述了西准噶尔札依尔山南缘下石炭统（或包括部分上泥盆统）太勒古拉组中发现的深水火山碎屑岩沉积特征；根据粒序、沉积结构和构造、横向与垂向上的特点，将深水火山碎屑岩划分为６种岩组，并建立了４种岩相组合；剖面垂向层序表明：从底向上，粒序由粗变细，层厚由厚变薄，“近基”火山碎屑浊积岩逐渐被“远基”浊积岩代替，表明研究区泥盆纪末至早石炭世，洋盆扩张，火山喷发由强变弱，沉积环境由深海浊积中扇向外扇演化     

川东南上二叠统龙潭组泥页岩发育特征

为了探讨四川盆地东南部二叠统龙潭组泥页岩的资源潜力,在总结近年来四川盆地东南部龙潭组研究现状的基础上,根据野外露头、岩心和测井等资料,以层序地层与沉积相理论为基础,建立了层序界面识别标志和层序地层格架,研究了沉积相对岩性分布的影响,总结了龙潭组泥页岩岩性组合特征和泥页岩厚度特征。研究结果表明,四川盆地东南部龙潭组由底至顶依次划分为SQ1、SQ2、SQ3三级层序,SQ1层序由低位体系域、海侵体系域和高位体系域构成,而SQ2层序和SQ3层序则皆由海侵体系域和高位体系域构成;四川盆地东南部泥页岩组合及厚度受控于沉积环境:滨岸相主要泥页岩组合为泥包砂,厚度大;潮坪相主要泥页岩组合为泥包砂,有效厚度仅次于滨岸相;混积陆棚相泥页岩组合以泥包灰为主,较薄; SQ1段、SQ2段和SQ3段泥页岩厚度总体上表现为西南部厚、东北部薄的变化趋势。     

云南澜沧老厂矿区石炭系划分及原中上石炭统碳酸盐岩时代归属探讨

参照目前的石炭纪和二叠纪地层划分方案,笔者将云南澜沧老厂矿区石炭系与滇西凤庆平掌剖面石炭系进行对比,认为老厂矿区只存在相当于平掌组下段的地层;根据在矿区原中上石炭统"C2 3"碳酸盐岩中所采到的化石面貌显示,该套碳酸盐岩应该属于早二叠世紫松期的沉积,即为下二叠统鱼塘寨组的上段,因而矿区平掌组上段的地层及上石炭统缺失.并重新厘定了老厂矿区的地层层序.     

西藏日土县拉竹龙—双陷大坂的泥盆系和石炭系

本文主要论述西藏日土县以北拉竹龙-双陷大坂地区,新发现比较完整的中、晚泥盆世和早石炭世地层。根据化石和岩性特征,把该区中、上泥盆统划分为中泥盆统的三岔口组、万泉河组,上泥盆统的邦达组、拉竹龙组;下石炭统划分为月牙湖组、双陷大坂组。上述各组除拉竹龙组外,均为新建组名。三岔口组、万泉河组、邦达错组和拉竹龙组的层位,分别与应堂阶、东岗岭阶、余田桥阶和锡矿山阶相当,而月牙湖组和双陷大坂组的层位,则分别与岩关阶和大塘阶相当。     

塔里木盆地小海子剖面沉积特征及演化

塔里木盆地巴楚地区小海子剖面是盆地石炭系出露最全最好的地区,对该剖面的研究将有助于解析该套地层.根据野外观察、室内分析,认为小海子剖面上泥盆统-石炭系主要为一套浅海相沉积体,下部主要发育浪控碎屑滨岸,中部为开阔台地、潟湖、局限台地等混积环境,上部为一套厚层的蒸发台地环境膏岩,顶部则呈现出混积的局限台地特征.结合盆地地层展布和构造演化,认为小海子剖面上泥盆系-上石炭统沉积自下而上可分为碎屑岩、混积、膏岩、混积四个演化阶段.     

Discovery of marine fossils in the upper part of the Permian Linxi Formation in Lopingian, Xingmeng area, China

Two important geological issues have a long history of debate in the Xingmeng area. The first concerns the final closure of the North China plate, Siberia plate and several intermediate massifs in the area, and the other con- cerns the folding and lifting of the Xingmeng Trough. Dis- agreements arise because of issues involving the tectonic- palaeogeographical environment of the Upper Permian deposits of the Linxi Formation. The Linxi Formation （Upper Permian） is generally considered to be either an exclusively continental deposit or separated into marine- terrigenous facies deposited during the Lower to Middle Linxi Period and continental deposits in the Upper Linxi Period. However, in this study, large numbers of bryozoan and sponge spicule fossils were discovered for this first time in the thick limestone layers and lenses of the upper part of the Linxi Formation found in the Guandi section of Linxi county in eastern Inner Mongolia. At the same time, abun- dant bryozoan fossils were also found in sedimentary tuff slices that were collected from the upper part of the Tao- huayingzi Formation from the Taohuayingzi section in Ar Horqin Banner, and abundant small connecting body crinoid stem fossils were found in the dark shale of the Yangjiagou Formation from the Yangjiagou section of Jiutai county, Jilin Province. These marine fossils provide the first evidence that the Xingmeng area was still a marine or mainly marine environment at the end of the late Permian. This not only provides conclusive evidence for the recognition of the above two major geological issues but also promotes chan- ges in the approach towards research, exploration and development of oil and gas, shale gas （oil）, and other mineral resources that are preserved in the late Permian layers of the Northeast-Xingmeng area.     

云南省建水县石头寨铅锌矿床成矿条件分析

该铅锌矿床位于扬子准地台滇东台褶带昆明台褶束南缘,区域构造以北东向及东西向断裂和褶皱构造为主,矿区构造线方向与区域构造线特征大体相近,呈近东西向或北东东向。矿区内主要为一单斜构造,地层倾向南南东。矿床产于上泥盆统在结山组(D3zj)的断层破碎带中,该地层倾向南南东,倾角20-30°,岩性单一,主要由浅灰、灰白色薄层状含泥质条带粉-细晶白云岩与中-厚层状、块状粉-细晶白云岩组成。矿体呈脉状产出,走向近北东东。矿石矿物主要为闪锌矿,其次为少量方铅矿,未见其他金属矿物,脉石矿物只有方解石。该矿床是受北东东向的断裂构造和泥盆系下统在结山组(D3zj)白云岩系控制的,含矿热液沿断裂构造运移,在碳酸质围岩性质活泼的构造破碎带中发生交代、蚀变、充填作用,于有利的成矿空间内沉淀富集并成矿,属中低温热液型矿床。     

四川龙门山区晚泥盆世的轮藻化石层及其地质意义

本文描述了四川龙门山区晚泥盆世轮藻藏卵器的两个种,一是Sycidium melo F.Sandberger,(甜瓜形直立轮藻),另一是Sycidium melo var.pskowensis Karpinsky(甜瓜形直立轮藻卜斯科变种)。这两个Sycidium种的数量非常丰富,组成一Sycidium粘土层,这对理解法拉与法门期之间的生物灭绝,晚泥盆世的海退及地层中的似整合等问题是十分重要的。     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower ()rdovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as “oil families“, although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any “oil family“. Despite their close stratigraphic proximity, it is evident that the oils of the/rower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new “oil family“ within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

淮南新庄孜太原组的■类

本文系统描述了新庄孜太原组剖面,研究了灰岩中的(竹蜓)类动物群,计有13属41种,其中包含3个未定种。根据(竹蜓)类组合特征,可建立Pseudofusulina vulagris——Quasifusulinacayeuxi组合带,大致相当于江苏大屯太原组的Sphaeroschuagerina带,其时代应属晚石炭世晚期。