查询词典 Paleozoic

Wunan gold deposit is located in the active zone of northern margin of Tarimu plate, which concretely exist in the structure unit of triphibian edge in the late Paleozoic in southern Tianshan.

梧南金矿床位于塔里木陆块北缘活动带，属南天山晚古生代陆缘构造单元。

The continental mantle geochemical characteristics and crust-mantle evolution in the west of Yangtze Plate was discussed through the study of some within-plate basic ultrabasic rocks from Lower Proterozoic to Later Paleozoic in this paper.

本文通过对扬子板块西部从早元古代至晚古生代不同时期的多个板内基性超基性岩的地质地球化学研究，探讨了扬子板块西部大陆地幔的地球化学特征及壳幔演化机制。

This thesis studies each structural layer's feature:(1) structural layer of basement:it is a Paleozoic folded basement,whose tectonic deformation and magma intrusion is fiercely,and it is affected by the early Hercynian tectonic movement and related to the underthrust and closure (C1) of Zhungaer ocean basin and the areal pressing of continents (C2-3);(2) structural layer of Permian:due to the regional extending and fault depression role in mid-Hercynian,it occurred to the combinations of structure and magma in Santanghu basin and it's periphery area,such as A-granite's stock,batholiths and diabase's dike.

二叠系构造层：受中海西区域性伸展断陷作用的影响，盆地及其周缘地区发育与伸展构造有关的构造-岩浆组合，如呈岩株、岩基状侵位的A型花岗岩以及呈岩墙状侵位的辉绿岩等。

The Northern Uplift of the Tarim Basin had undergone a long-term compressional uplifting and erosion since the Early Paleozoic,and also integrated with the upwarp of the Cambrian gypsum formation,thus forming two basic types of carbonate rock traps,namely,weathered-crust buried hills and insider anticline traps.

塔北隆起自早古生代以来经历了长期的挤压隆升剥蚀过程，结合寒武系膏盐的塑性上拱，形成了两种基本的碳酸盐岩圈闭类型，即风化壳潜山和内幕背斜圈闭。

The deposit is an adular- and sericite-bearing epitheral gold deposit formed in late Paleozoic volcanic area.

双峰山矿床是晚古生代火山地区典型的冰长石－绢云母型浅成低温热液金矿床。

The deposit is an adular_ and sericite_bearing epitheral gold de posit formed in late Paleozoic volcanic area.

双峰山矿床是晚古生代火山地区典型的冰长石_绢云母型浅成低温热液金矿床。

Which were found in succession in the Yili Late Paleozoic volcanic rock province in the north section of West Tianshan Mountains ,are considered as epithermal mineralizing type,and furtherly divided into adular sericite sub type and silicated rock sub type.

20世纪90年代，在新疆西天山北段晚古生代火山岩区内相继发现了阿希大型金矿床及其外围的伊尔曼得、恰布坎卓它等金矿床，并进一步确定了其系产于晚古生代火山岩内的浅成低温矿床。

Hydrothermal sedimentary albitite in the Upper Paleozoic in the South Qinling is closely related to many large-superlarge lead-zinc deposits in the south Qinling orogenic belt.

提要：热水沉积钠长石岩在南秦岭上古生界中颇具特点，与南秦岭众多的大型，超大型铅锌成矿关系密切。

This paper reports the results of highly precise zircon SHRIMP U-Pb dating of quartz albitite in the volcanic-sedimentary series of the Tuolugou cobalt deposit, Golmud, Qinghai. Analyses of eight spots presented 206Pb/238U ages of 455 to 483Ma with a weighted mean age of 468±9Ma, which represents the timing of submarine volcanic exhalation in this area. Therefore, the age of the host rocks of the Tuolugou ore district is redefined as Ordovician, which implies that regionally the main part of the Naij Tal Group should be Early Paleozoic in age.

青海格尔木驼路沟矿区赋矿火山－沉积岩系中的石英钠长石岩样品锆石SHRIMP U-Pb精细测年结果表明，该岩石具有一组8个测点构成的455~483Ma的206Pb/238U年龄数据，加权平均年龄为468Ma±9Ma，应代表本区海底火山喷流作用的时间，因此重新厘定了矿区内含矿岩系的时代为奥陶纪，同时，这一年龄指示区域上纳赤台群主体的时代应为早古生代。

Recently, a nearly E-W-striking, over 10 km long albitite zone has been recognized for the first time in the Lower Silurian Meiziya Formation in a Lower Paleozoic lead-zinc ore deposit concentration area of the Xunyang basin, South Qinling. It shows a conformable contact and gradational relationships with the country rocks and has thick-bedded and massive, banded, brecciated structures and fine and very fine equigranular and intraclastic textures. It is chemically characterized by enrichment in SiO2, Al2O3 and Na2O and is rich in the trace elements Fe and Mn and poor in the trace elements Co, Ni and Cu. Its ∑REE, LREE and HREE are lower than those of the country rocks and exhibit pronounced Eu depletion.

最近，在南秦岭旬阳盆地下古生界铅锌矿集区内的志留系梅子垭组地层中首次识别出一条近东西方向延伸长达10余千米的钠长石沉积岩带，与地层整合产出，渐变过渡，厚层块状，条带状，角砾状构造，均粒微-细晶结构，内碎屑结构；其化学成分以富含SiO2，Al2O3及Na2O为特征，富Fe，Mn，贫Co，Ni，Cu等微量元素；该钠长石岩的∑REE，LREE，HREE均较围岩偏低，具明显Eu亏损的特征。

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。