In the former province, the upper mantle rocks consist of harzburgite and lherzolite, characterized by the concentration of mantle type elements (K T) and the smooth-weak enrichment type REE patterns; the ocean volcanic rocks are dominated by basic rocks of subalkaline and oceanic ridge type; lead isotopes are noted for 206Pb/ 204Pb<18.
前者上地幔岩有方辉橄榄岩和二辉橄榄岩 ,幔型元素 (KT)富集 ,REE呈平坦—弱富集型 ;大洋火山岩以基性岩、亚碱性、洋脊型为主 ;铅同位素2 0 6 Pb/2 0 4 Pb <18。
Seamounts, underwater volcanoes, Rift Valley, the mid-ocean ridge,constitute a rich world of the ocean floor.
海底山脉、海底火山、裂谷、大洋中脊等等，构成了丰富的海底世界。
The gold was mainly taken from the Archaeozoic submarine volcanic eruption products and partly from terrigenous weathered alluvial deposits.
金主要来自太古代海底火山的喷发产物,部分来自陆源风化冲积物。
Development of Sampler Actuated by a Shape-Memory-Alloy Element for Hydrothermal Fluid From Underwater Volcano;
基于形状记忆合金元件驱动的海底火山热液采样器开发设计
It is a rock of almost conical form, which looks as though it had been thrust up by volcanic force from the depth to the surface of the ocean.
它像是一块圆椎形的大岩石，似乎是某次海底火山爆发把它推到海面上来的。
Minerals that melt at lower temperatures and are lighter than the surrounding material tend to rise, melting their way up through the overriding plate to erupt as volcanoes on the ocean floor.
在较低温度下熔化并且轻于周围物质的矿物容易上升，熔穿仰冲板块，像海底火山一样发生喷发。
A very large ocean wave caused by an underwater earthquake or volcanic eruption.
海啸由海底地震或火山喷发而造成的巨大海浪
submarine ridge
海底山脉,海脊, 海岭
an underwater mountain rising above the ocean floor.
水底下的高出海底的山。
IceBergs can send Big ships to the Bottom of the sea.
冰山能使巨轮沉没海底。
Icebergs can send big ship to the bottom of the sea.
冰山能使巨轮沉没海底
A flat - topped submarine mountain.
平顶海山一种在海底的平顶山岭
3. cannot effectively find the seabed hydrothermal sulfide ore spot hosted in the base of the detritus, the silt and the volcanic ash.
3、不能有效地发现赋存在碎屑、淤泥、火山灰之下的海底热液硫化物矿点(床)。
Geochemical signatures and tectonic setting of the volcanic rocks from the Upper Triassic Nadigangri Formation in the Mugxung region,Zhidoi,southern Qinghai
青海南部治多县莫云一带上三叠统那底岗日组火山岩特征及其构造环境
A long, steep - sided valley on the ocean floor.
海沟一种海底狭长而两边陡峭的山谷
Shanhaijing Pictures Passes from Generation to Generation--Book Review of Shanhaijing wuzanshangjing Picture Interpretation
薪火相传山海图——张华《山海经·五藏山经图译》评介
This rock type originates in the magma chambers that underlie volcanoes.
这种岩石源自火山底下的岩浆库。
THE BASIC CHARACTERISTICS OF CAMBRIAN MARINE VOLCANIC ROCKS IN THE NORTHERN QILIAN MOUNTAINS
北祁连山寒武纪海相火山岩基本特征
Molten lava cooled and sealed up the bottom, forming a huge bowl-shaped crater.
熔岩冷却后封住了火山底，因而形成了一个大型的碗状火山口。