查询词典 Paleozoic

This discovery is of great significance for understanding the late Paleozoic ophiolitic mélange belt in the area north of the Junggar basin of China and its extension beyond China.

这一发现对于认识中国准噶尔盆地以北地区的晚古生代蛇绿岩带及其向境外的延伸具有重要的意义。

Early Paleozoic massive sulfide deposits of ophiolitic type in North Qilian Mountains are distributed mainly in areas of Early and Middle Ordovician basic volcanic and volcano_sedimentary rocks.

西北海相火山岩地区块状硫化物矿床的勘查与研究始于新中国成立初期国家急需铜矿资源的形势下。

Key words : Ertix; ophiolitic m é lange ; Buergen ; OIB ; IAB ; late Paleozoic

关 键 词：额尔齐斯；蛇绿混杂带；布尔根； OIB ； IAB ；晚古生代

Early Paleozoic massive sulfide deposits of ophiolitic type in North Qilian Mountains are distributed mainly in areas of Early and Middle Ordovician basic volcanic and volcano_sedimentary rocks.

文章主要论述了北祁连山西段石居里矿田内Ⅵ号沟、Ⅷ号沟、九个泉等矿床的基本地质特征，并与北祁连山东段老虎山地区银硐沟、猪嘴哑吧等矿床对比。

The Garzê-Litang fault belt has experienced a series of complex evolutionary processes since the Paleozoic and is a large-scale, structurally complex ophiolitic mélange belt that has been strongly reworked and dismembered by overthrusting and sinistral strike-slip shear during the Cenozoic Himalayan orogeny.

提要： 甘孜—理塘断裂带自古生代以来经历了一系列复杂的演化过程，为一规模宏大、结构复杂并受到新生代喜马拉雅期逆冲推覆和左行平移走滑剪切作用强烈改造肢解的蛇绿混杂岩带。

However, relating to investigate the modes, courses and characteristics of the orogenetic process in Paleozoic and after orogenetic process, the cognitive divergence have still occurred.

通过对新疆北东部地区不同构造区带构造作用的方式、过程和特点的研究，确定：①南天山榆树沟高压麻粒岩地体的正变质原岩是一个基本完整的蛇绿岩套，其经历了俯冲至下地壳的高压麻粒岩相、构造抬升至深地壳麻粒岩相以及快速构造折返至角闪岩相的变质过程，代表了南天山洋壳俯冲、变质、随后折返的过程，并首次确定了变质过程的PTt轨迹；②奥陶纪末期中天山北缘发生洋盆俯冲、地体增生作用，此时萨日达拉地区处于岛弧活动带；中石炭世晚期中天山小型洋盆关闭，准噶尔地块与伊犁—中天山板块斜向对接随后发生脆韧性质近水平高温低速右行走滑剪切；③根据巴音沟地区不构成蛇绿岩套有效成分的硅质岩具有与活动大陆边缘密切相关的地球化学特征以及洋中脊玄武岩显示其岩浆源区受到消减带流体交代作用的影响，结合区域地质资料，首次提出巴音沟蛇绿岩带所代表的洋盆古构造环境为弧后盆地，并于早石炭世至中石炭世末期间，经历了扩张、收缩和闭合过程；④首次在克拉麦里蛇绿混杂岩带中分解出具有N-MORB、T-MORB与OIB三种不同类型的火山岩岩石组合，反映了洋盆俯冲

Based on the formation and separation of pan continent,the origin time of ancient species of Paeoniaceae might be back to the carboniferous of Paleozoic,and was not later than early Mesozoic.The modern species of the family flourished in Jurassic and early Cretaceous.

起源时间可以追溯到古生代的石炭纪，由于泛大陆形成与分离而形成芍药科的芍药组与北美芍药组遥相对应呈间断分布格局。

According to these, we can realize tectonic control, palaeogeographic pattern as well as palaeobiogeographic distribution of the Qinghai-Tibet Plateau in the early Paleozoic and also provided the materials to the cosmepolitical biostratigraphic contrast.

新建下奥陶统扎扛组和他多组，完善了藏北地区早古生代地层序列，为研究青藏高原在古生代早期的构造活动、演化、古地理分布格局及古生物地理区划提供了资料，也为世界性生物地层划分对比提供了依据。

Through testing 45 carbonate samples collected from PermoCarboniferous caol measures of the Hedong coalfield,the distributions characteristics of carbon and oxygen isotopes in sequences are analyzed,whose feasibilities for sequence subdivision and correlation,as well as for study of relative sea level variations and late Paleozoic facies are also discussed.

系统分析了河东煤田上石炭统（C2）—下二叠统下部（P11）45个碳酸盐岩样品的碳氧同位素在层序中的分布特征，探讨了碳氧同位素应用于层序划分及对比、相对海平面变化研究及晚古生代地层沉积相研究的可能性。

This paper studys the the interactions between solution of primary minerals ofthe reservoir sandstone, the deposition of authigenic mineral, and the formingmechanism of secondary porosity in Upper Paleozoic reservoirs in Ordos basin withthe modeling theory of Water-Rock Interaction, builds the correspondingthermodynamics database and dissolution experiment database, and provides thecomparable and quotative data for the Water-Rock Interaction modeling research ofreservoir rock.

本论文将水—岩相互作用模拟(即热力学理论模拟计算和溶解模拟实验相互结合的方法)用于鄂尔多斯盆地上古生界碎屑岩骨架组分的溶解、自生矿物的沉淀及其与次生孔隙形成机制之间关系的研究，建立了相应的热力学数据库和溶解实验数据库，为沉积盆地储集岩的水—岩相互作用的模拟研究提供了可对比与借鉴的基础资料。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。