查询词典 volcanic

The lateral variation in Tengchong volcanic area is larger than that in Wudalianchi volcanic area.

腾冲火山区的横向速度结构变化比五大连池火山区更为显著。

Silicalites, predominated by pelitic silicalite, occur in collisional zones and back-arc basins. In the collisional zones, they occur as rock sheet as an important part ofophiolitic mé lange, belonging to ophiolitic mélange type silicalite. In the back-arc or interarc basin, they occur as pelitic silicalite intercalation varying in thickness, characteristic of "silica merl",and belonging to abyssal back-arc basin type or carbonate type silicalite. In the magmatic arc, they occur as intercalation related to volcanic hydrotherm or volcalic exhalation, belonging to volcanic arc type silicalite.

在硅质岩方面：冈底斯构造带侏罗系硅质岩主要属泥质硅质岩，在各个碰撞结合带和弧后盆地中均有产出，主要的产出状态有：①在碰撞结合带中呈岩块产出，构成蛇绿混杂岩的重要组成部分，属蛇绿混杂岩型硅质岩；②在弧后或弧间盆地中呈厚度不等的泥质硅质岩夹层产出，常具"硅灰泥"特征，属弧后深水盆地型硅质岩；③呈夹层状产于弧火山岩系中，属火山热液或火山喷气型硅质岩。

Based on field work in fourteen typical ore districts of China, the author made experiments on contact metasomatism of ultrabasic-acid intrusive rocks with carbonate rocks, interaction between volcanic pneumatolyto-hydrothermal solution and volcanic rocks, and metasomatism in the process of sedimentary metamorphism and migmatizatiun.

本文作者在全国14个典型矿区的野外工作基础上，进行了超基性-酸性侵入岩与碳酸盐岩的接触交代实验；火山气热液与火山岩的相互交代实验；区域沉积变质和混合岩化过程中的交代作用实验。

The raw and processed materials of AD brand cosmetic give priority to Caucasian volcanic mud and volcanic cold mineral spring of Russia.

AD品牌化妆品的原材料主要以俄罗斯高加索火山泥和火山冷矿泉为主。

Moho in Tengchong volcanic area is deeper than that of Wudalianchi volcanic area.

腾冲火山区的莫霍界面与五大连池火山区的莫霍界面的埋藏深度有一定的差异，壳幔界限不十分清楚。

Northeastwards younging of rocks along the northern coast suggests a gradual migration of the volcanic centers in King George Island, which correspond to the regularly distributed time space pattern of the volcanic activities on the South Shetland Islands.

岩石的年龄由南西向北东依次变新，表明乔治王岛的火山活动中心在不断迁移，与整个南设得兰群岛火山岩的时、空分布规律相符。

The petrochemistry and geochemistry of Mesozoic volcanic rocks mainly indicate the environmental characteristic of distending structure which bears on orogenic belt. The process of the evolution that earth crust keeps thinning reflects that it is still in the time of extruding orogenesis. Only during the intermittence or relaxation stages of extruding orogenesis, the volcanic eruption of neutral rock and acidic rock were formed in the situation of relative distending structure.

中生代火山岩的岩石化学、地球化学特点，主要显示了与造山带有关的拉张构造环境特征，而地壳由薄变厚的演化过程，则反映了该时期仍以挤压造山作用为主，只是在挤压造山作用的间歇或松驰阶段，相对处于拉张构造环境的情况下，形成了中酸性岩的火山喷发。

In this paper, the petrology, mineralogy and geochemistry of basic-ultrabasic volcanic rock, granite and skarn related to the Sn-Cu skarn-type ore and the vein-type ore in Laochang ore field have been researched systematically, some conclusions are summarized as follows:In Gejiu tin-polymetallic district, the middle Triassic volcanic rocks belonging to calc-alkaline basalt-tholeiite serie, mainly consist of pyroxene, hornblende, feldspar, chlorite and phlogopite; All the granites are peraluminous granites related to the Yanshanian collision-orogeny. Laoka granite closely related to the tin-polymetallic deposits emplaced in the post- orogenic.The metal elements show obviously vertical zones with the variety of skarn types in dimensional extension; The occurrence of garnet skarn and diopside skarn alternately developed in the horizontal zones of the contact between granite and carbonatite are mainly related to two factors: one factor is the infiltration metasomatism of post-magmatic hydrothermal solution, the another is the metrical strata of marble and calcic-dolomite developed in country rocks.

本文重点以老厂矿田中的接触带锡铜矿床和脉状矿床为研究对象，采用化学分析、ICP-MS、X射线粉晶衍射分析、电子探针等测试手段，对本区与成矿相关的基性-超基性火山岩、花岗岩、夕卡岩、电气石-石榴石等进行了系统的地质地球化学研究，研究表明：个旧矿区中三叠纪个旧组地层中的火山岩为钙碱性玄武岩-拉斑玄武岩系列，岩石为辉石-角闪石-长石-绿泥石-金云母组合；本区的花岗岩为过铝质花岗岩，主要与燕山期碰撞造山作用有关，锡多金属成矿与形成时代最晚、分异较好的花岗岩关系密切；本区夕卡岩中的有用共生组份随着夕卡岩类型及其矿物组合的不同具有明显的分带性。

Base on above studies, some conclusions were obtained as follows:(1) ore-forming background of the studied ferromanganese crusts are mainly controlled by intensity of Antarctic Bottom Waters and variations of material source;(2) it is confirmed that the ferromanganese crusts are mainly hydrogenetic and their composition are affected by volcanic and continental material simultaneously; there are no obvious phosphatization reconstruction and element reaction occurred in them, so they have important paleoceanological significance;(3) from researches on element occurrence modes in the new-type ferromanganese crusts and the lying sediments, it is proposed that there is no great biological affection on the crusts formation and their composition mainly came from the adsorptive action of the ferromanganese oxides in them;(4) two major types of ore-controlling factors are identified through compilation of ore-controlling factors, which are geological and oceanic factors;(5) considering the long-term variation trends of the crusts composition, combing the U-series and 10Be isotope dating results, it is proposed that the ore-forming processes of ferromanganese crusts in the studied areas can be divided into three major stages (5.6~2.8 Ma, 2.8~2.7 Ma and since 2.7 Ma), and then the activities of AABW since the Late Miocene, changes of input flux coming from volcanic and continental material are confirmed.

通过研究，得出如下结论：(1)研究区铁锰结壳的成矿背景主要受控于南极底流强弱及物源供给的变化；(2)证实铁锰结壳主要为水成成因，同时其物质组成也受一定程度的火山和陆源物质的影响；结壳自形成以来没有遭受到明显的磷酸盐化等成岩后期改造和元素再迁移，具有重要的古海洋学意义；(3)通过新型铁锰结壳及下伏沉积物元素赋存状态的研究，认为生物作用对研究区结壳的形成并没有很大的直接影响，其物质成分主要来自于结壳中铁锰氧化物的吸附作用；(4)在控矿要素的研究中，归纳出了地质与海洋两大类结壳控矿要素；(5)根据结壳成分长周期变化趋势，结合铀系和10Be测年结果，将研究区结壳的形成过程划分为三个主要阶段(5.6~2.8 Ma，2.8~2.7 Ma和2.7 Ma以来)，并确定了晚中新世以来研究区南极底流的活动情况、火山和大陆来源物质输入量的变化。

The first type is different kinds of rocks including sedimentary rock, metamorphic rock and volcanic rock among which black mudstone, black shale, clay, slate, phyllite, granite, basalt, andesite and volcanic ash are the best except some chemically depositional rock such as salt rock, gypsum, limestone.

第一类是自然界各种不同类型的岩石，包括沉积岩、变质岩和火山岩，其中以黑色泥岩、黑色页岩、粘土、板岩、千枚岩、花岗岩、玄武岩、安山岩及火山灰为最佳，但不包括某些化学沉积岩，如盐岩、石膏、石灰岩。

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。