Ginkgo from Lower Cretaceous Changcai Formation in Helong of Jilin, NE China

Based on gross morphological and cuticular study, two species of Ginkgo From the Lower Cretaceous Changcai Formation in Helong of Jilin. were identified from this area for the first time, including Ginkgo coriacea Florin and G. sibirica Heer. The study is significant for better understanding the paleophytogeographic, paleoecologic and stratigraphic characters of the Early Cretaceous Changcai flora.     

Palynological evidence for Jurassic strata in the Panagarh area, West Bengal, India

The Rajmahal Traps were discovered in the Panagarh area, West Bengal, during the exploration for coal resources. A Gondwana succession was found beneath the traps, consisting of the Early Cretaceous Intratrappean Rajmahal Formation, the Early Triassic Panchet Formation and the Late Permian coal-bearing Raniganj Formation. The present palynological study was aimed at confirming the age of the Panchet Formation. As a result of this study it has been found that Jurassic sediments are also included in the Panchet Formation. The study has revealed that the Panchet Formation, defined on a lithological basis, is a time-transgressive unit extending from the Early Triassic to the Late Jurassic, with a phase of non-deposition between the Middle Triassic and Middle Jurassic.     

Eutrephoceras subplicatum (Steinmann, 1895) is a junior synonym of Eutrephoceras dorbignyanum (Forbes in Darwin, 1846) (Cephalopoda, Nautiloidea) from the Maastrichtian Quiriquina Formation of Chile

Nautilus subplicatusSteinmann, 1895 is a latest Cretaceous species of nautiloid which is common in southern South America (Chile, Argentina) and the Antarctic Peninsula and which is best assigned to the genus EutrephocerasHyatt, 1894. Nautilus dorbignyanusForbes in Darwin, 1846 and Nautilus valenciennii Hupé in Gay, 1854 are here considered to be senior synonyms which later authors have apparently overlooked. The type material of these two taxa is reillustrated. On the basis of this and additional material it is demonstrated that only a single nautiloid species occurs in the Quiriquina Formation of late Maastrichtian age. For this we propose to use N. dorbignyanus as the oldest available name.     

Characteristics and evolution of lacustrine turbidite of Chang-7 Member of Yanchang Formation in northern Shaanxi

Lacustrine turbidite of Chang-7 Member in the studied area consists of sihstone and fine sandstone with respect to grain size, which is feldspathic lithie sandstone, syrosem arkose and arkose with respect to mineral constitution affected by provenance. There are such apparent signatures as lithology, sedimentary structure, sedimentary sequence and well logs, to recognize turbidite. During the paleogeographic evolution of Chang-7 Member, lake basin and deep lake are both at their maximum extent during Chang-73 stage, resulting in the deposition of Zhangjiatan shale with widespread extent and of turbidite with fragmental-like. Deep lake line is gradually moving toward lake center and turbidite sand bodies are gradually turning better with better lateral continuity, connectivity and more thickness, from stages of Chang-73, Chang-72 and Chang-7t, which can be favorable reservoir in deep-water.     

河北宽城地区中元古界高于庄组微古植物群

通过对河北宽城地区高于庄组微古植物进行系统采样,利用化学浸解法,获得了大量微古植物信息,在80件样品中发现微古植物个体5000余粒,共鉴定出41属108种（含1个新属,9个新种,38个未定种）,其中包括丰富的多细胞植物化石及其碎片。根据微古植物化石的分布和特征,划分出4个化石组合。与下伏长城系微古植物相比,高于庄组微古植物具有明显的差异。这些微古植物的发现为地球早期生物演化、区域地层划分和对比,以及生物成矿和成油研究提供了重要信息。     

西藏仲巴地区曲嘎组的拆解

根据1∶5万仲巴地区区域地质调查,对雅鲁藏布江缝合带西段夹持于2套混杂岩之间的仲巴微地体原二叠系曲嘎组进行了拆解。研究认为：①原曲嘎组可以解体为3套地层,分别是下古生界的奥陶系—志留系紫曲浦群、上古生界泥盆系纳登尔组和石炭系—二叠系曲嘎群,新建曲嘎群与原曲嘎组没有直接对应或者级别关系;②紫曲浦群以变质碳酸盐岩为主,下部紫曲电站组为紫红色、灰色大理岩与结晶灰岩组合,属中—晚奥陶世,上部紫曲石组以紫红色大理岩为特征,暂归志留纪;③纳登尔组由一套灰色千枚状板岩和钙质片岩组成,上部结晶灰岩增多,时代为泥盆纪,可归属马攸木群;④曲嘎群可划分为3个组：岗珠淌组,以灰色、灰绿色板岩、粉砂岩为主,向上砂岩和灰岩增多,属于石炭纪—早二叠世（乌拉尔世）早期;仲巴组,以肉红色灰质晶粒白云岩及杂色生物屑云质灰岩为特点,分为2个岩性段,属于早—中二叠世（乌拉尔世—瓜德鲁普世早中期）;卡扎勒组以深灰色钙质板岩为主或夹结晶灰岩和砂岩或互层,属于中—晚二叠世（瓜德鲁普世—乐平世）;⑤仲巴地区曲嘎组的拆解在仲巴微地体西部和老仲巴以东的应用有待证实,其在岩性上与相邻地体同期地层有较大差别,但在生物群组成方面具有相似性。     

评价储层含油性的热解参数校正方法及其应用

评价储层含油性时，热解参数Ｓ１＋Ｓ２是一项有效参数。其中Ｓ２相对稳定，Ｓ１则随样品类别或露置时间的不同而发生变化。岩心样品的随钻解分析值比较接近真实，岩屑和井壁取心样品的Ｓ１会明显损失。而目前多数探井心进尺少，大多为岩屑录井。     

论氢化物的形成及其在分析测试领域的应用

论述了氢化物形成的普遍性、氢化物的物理化学性质、元素周期系各类元素的氢化物类型。认为一些金属离子、非金属离子在酸性介质中与硼氢化钾（钠）作用及金属锌等强还原剂作用生成氢化物。综述了氢化物的形成在分析测试领域的应用：试样分解、分离富集、容量分析、光度分析、原子光谱分析、质谱分析。     

Fischer图解及其在旋回层序研究中的应用──以北京西山张夏组为例

Ｆｉｓｃｈｅｒ图解（又称为容纳空间图解）为人们研究沉积旋回在空间上的叠置规律、相对海平面变化、层序级次的划分以及地层层序对比等提供了一种客观实用的方法。本文较详细地讨论了该图解的绘制方法及应注意的问题。运用该图解，将北京西山下苇甸剖面张夏组划分为１个大的三级旋回层序和４个四级旋回层序，根据图解反映的相对海平面变化讨论了旋回层序与构造运动间的关系，提出华北板块晚寒武世之前的＂翘翘板运动＂应始于中寒武世张夏期之早期到中期。     

地电提取测量法在北衙寻找隐伏矿的可行性

地电化学提取测量法是应生产需要而发展起来的一种轻便，快捷的寻找隐伏矿床的方法，在云南鹤庆县北衙地区进行实验研究，取得较好的效果，并在末知矿区圈定了远景规划区，为进一步探矿提供科学依据。