查询词典 volcanic

The SiO〓 and K〓O contents of volcanic rock increase with time, and the series of volcanic rock develops from the transition between alkaline series and calc-alkaline series to calc-alkaline series.

随时代变新，火山岩的SiO〓和K〓O含量增加，TiO〓含量适中，变化不大；岩石系列由碱性与钙碱性过渡的系列向钙碱性系列演化。

S o the fires to make containers from the volcanic clay must be hotter, they toughs use form than those used for non-volcanic clay.

用火山粘土来制造容器的烧制温度必须比非火山粘土的烧制温度要高很多，其温度有可能要达到 1400 ℃。

This paper expatiates on the hazards of volcanic falling tephra, and demonstrates the pratical importance of making program for forecasting the risk of volcanic falling tephra.

简述了火山空降碎屑灾害的危害性，指出研制火山空降碎屑灾害预测软件包的实际意义。

The main deposit type will be volcanic secondary volcanic gold deposit and porphyry copper/molybdenum deposit.

主攻矿床类型为火山—次火山岩型金矿和斑岩型铜钼矿。

The continental volcanic-, subvolcanic rock-type Ag deposit s are the most important silver mining industry type, and they mostly occur in the areas where continental volcanic rocks are widespread at the margins of continental plates.

银是我国的紧缺矿种，也是全世界最走俏的金属商品，世界各国都在积极寻找新的银矿床。

The relationships between large igneous rock province, mantle plume and petroleum show that there is a low velocity-high conductive layer of mid-crust in the basin and this layer is the main source of oil and gas. Weathered granites and volcanic rocks are the best reservoir beds for hydrocarbon accumulation and the faults are the main migration pathway. It is suggested that granite and volcanic reservoirs be the future exploration targets.

通过研究花岗岩和火山岩油气藏的形成模式，指出大火成岩省、地幔柱与油气的关系表明盆地中地壳的低速－高导层可能是油气的主要来源，而花岗岩、火山岩的风化壳是油气成藏的最佳储集层，断裂则是其最主要的运移通道，花岗岩和火山岩油气藏将是未来勘探的重要目标。

Making use of petrochemical analysis and petrography,Werecover ancient rock's construction on the Archaean Era,Through the practice,We find bedrock consists of a set of neutrality and basis volcanic rock ,volcanoclastic rock ,deposition rock and partial volcanic rock with acidity.

利用岩石化学分析法并结合岩相学等特点将太古宙变质岩进行了原岩建造恢复，认为太古宙原岩为一套中、基性火山岩、火山碎屑岩和沉积岩，局部夹酸性火山岩建造。

The volcanic eruptive sequence established for South Shetland Islands region since A.D.1650 shows that 7 volcanic eruptive cycles could be distinguished during the past 340 years,as covered by the ice core.

依冰芯记录判断，该区 1 650年以来的 340年间，共有 7轮火山喷发。1 875～ 1 92 5年间似为火山活跃期，喷发地点可能主要在欺骗岛；1 650～ 1 80 0年间为一相对平静期；此后一个世纪不太稳定；而过去的 1 0 0年间基本平静，只是世纪初和 50～ 70年代间各有一段动荡期。

The volcanic eruptive sequence established for South Shetland Islands region since A.D.1650 shows that 7 volcanic eruptive cycles could be distinguished during the past 340 years,as covered by the ice core.

本文从冰川处于稳定状态的假定出发，根据 Dansgaard- Johnsen流动模式断代结果，建立了南设得兰群岛火山喷发序列。

Thousands of years ago, Rotorua＇s a volcanic eruption in the small islands form a volcanic zone peculiar natural landscape.

几千年前，罗托鲁阿的一场火山爆发，在小小的岛屿上形成了火山地带奇特的自然景观。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。