In sedimentary environment discrimination diagrams such as 100×Fe2O3/SiO2-100×Al2O3/SiO2,Fe2O3/(100-SiO2)-Al2O3/(100-SiO2) and Fe2O3/TiO2-Al2O3/(Al2O3+Fe2O3),chert samples fall into the areas of the mid-ocean ridges or deep-sea.
研究表明,呈厚层状产出的绿色、棕褐色硅质岩具有较高的SiO2含量,局部受Fe、Mn矿化,Al/(Al+Fe+Mn)比值小,在Fe-Mn-Al三角成因判别图解中,大部分硅质岩样品落入热水沉积区域,微量元素Sr、Zr、Cu、Zn和Ba含量较高,稀土元素∑REE较低,Ce负异常,Eu正异常,北美页岩标准化后配分模式稍向左倾,体现出热水沉积特征;在沉积环境判别图100×Fe2O3/SiO2-100×Al2O3/SiO2、Fe2O3/(100-SiO2)-Al2O3/(100-SiO2)和Fe2O3/TiO2-Al2O3/(Al2O3+Fe2O3)中,硅质岩样品投影到洋中脊和深海区域,说明形成于大洋中脊和深海盆地环境;硅质岩常量和稀土参数变化特征图显示,在剖面中PCL-1、PCL-5和PCL-7采样位置更接近热液中心;硅质岩的形成与板块的汇聚消减产生的以洋中脊和海底热点为中心的洋壳热水系统有关。
A review for the continental drift theory from the mid-ocean ridge——Give consideration to the expanding Earth hypothesis;
从大洋中脊反思大陆漂移说——兼论地球膨裂说
Exploration for Hydrothermal Fluids of Mid-Ocean Ridge and Novel Chemical Sensors;
大洋中脊热水探测与新型传感器
In this paper, a review of the InterRidge Workshop 2003, Beijing is made, and the organization, task and progress of the InterRidge Workshop as well as the trends of mid-ocean ridge geology studies in the fduture are introduced in brief.
评述了2003年10月27 30日在北京召开的"大洋中脊国际学术研讨会",简要介绍了国际大洋中脊协会(InterRidge)的机构组成、任务和工作进展,以及今后大洋中脊地质研究的发展趋势。
Geochemical study of these basalts surely shows characteristics of typical N MORB.
来自 3条剖面的的基性熔岩样品主元素、微量和稀土元素地球化学特征显示样品属低钾拉斑玄武岩系列 ,在多种环境判别图解中一致投入 N- MORB区域 ,稀土总量低 ,具有轻稀土亏损型的球粒陨石标准化模式 ,表明该蛇绿岩形成于典型洋脊环境 ,属于西地中海型岩石圈残片 ,区域对比显示德尔尼蛇绿岩是青藏高原目前发现的最北端的古特提斯蛇绿
Marine geodynamics:from mid-oceanic ridge system to subduction factory
洋底动力学——从洋脊增生系统到俯冲消减系统
marine vertebrates have their weight supperted distributively by the water.
海洋脊椎动物的体重是由水来支持的。
Early Palaeozoic Mid-Ocean Ridge-Ocean Island and Back-Arc Basin Volcanism in the North Qilian Mountains
北祁连山早古生代洋脊-洋岛和弧后盆地火山作用
N-TYPE OCEANIC RIDGE BASALT IN THE GARGE -LITANG OPHIOLITE MELANGE ZONE
甘孜—理塘蛇绿混杂岩带存在N型洋脊玄武岩
Continental margins of so-called "passive" types are strongly coupled to any events at ridge crests.
所谓“被动”型的大陆边缘与洋脊任何变动事件有很大关系。
east pacific rise geothermal belt
东太平洋中脊地热带
The floor of the Atlantic ridge in the middle from north to south
大西洋洋底在中部形成由北向南的海脊
The floor of the Atlantic ridges in the middle from north to south.
大西洋洋底在中部形成由北向南的海脊。
The sea floor is spreading away from the mid-ocean ridges.
海底正在从大洋中脊扩张开来。
Jurassic and Cretaceous, the marginal ocean basin was in the stage of ocean crust evolution and had a setting similar to mid-ocean ridge.
侏罗－白垩纪为洋盆洋壳演化期，处于类似洋中脊的构造环境。
smooth dogfish of Pacific and Indian oceans and Red Sea having white-tipped dorsal and caudal fins.
太平洋、印度洋和红海水域的平滑狗鲨，长着白尖的脊背和尾鳍。
Lead Isotope Compositions of Seafloor Surface Hydrothermal Sediments in the TAG Hydrothermal Field of Mid Atlantic Ridge and its Geological Implications
大西洋洋中脊海底表层热液沉积物的铅同位素组成及其地质意义
Predominant strains of polycyclic aromatic hydrocarbon-degrading consortia from deep sea of the Middle Atlantic Ridge
大西洋洋中脊深海多环芳烃降解菌群的优势菌分析
small marine fish with a short smooth-scaled compressed body and feeble spines.
小型海洋鱼，鳞片小而圆，身体扁平，脊椎骨无力。
Diversity of Arsenite-resistant Bacteria from Deep Sea Sediments of Ocean Ridge;
深海洋中脊沉积物砷抗性菌的多样性分析
The rifts therefore represent divergent plate boundaries where seafloor spreading is taking place.
这样，大洋中脊就成为板块分离边界，海底扩张就发生在这里。
primitive marine animal having a saclike unsegmented body and a urochord (a notochord) conspicuous in the larva.
有囊状不分段形状身体的原始海洋动物，幼虫阶段有明显的脊索。
tropical marine fishes having the teeth fused into a beak and thick skin covered with bony plates or spines.
热带海洋鱼，牙齿合并为喙，厚厚的皮肤上盖有骨盘或脊骨。
