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- The principal period of volcanic activity produced large volumes of mainly acid and basic volcanic rocks accompanied by volcaniclastic sediments which contain isolated coal seams. 火山活动的主震时期产生了大量的主酸性以及基性火山岩,并伴随着火山碎屑沉积物,且其中包含着分离的煤层。
- Isotopic analyses and REE patterns indicate that the basic volcanic rock is the gold source bed. 因此,该矿床可称之为剪切带蚀变岩型金矿床,具有一定的找矿潜力。
- With the increase of SiO2,from the basic volcanic rock to the acid volcanic rock,the fractional degree of HREE and LREE becomes more and more high. 从基性火山岩到酸性火山岩,随着SiO2的增加,轻重稀土分馏程度越来越高。
- The basic rocks, which belong to alkali and tholeiitic magma series, enriched in LREE and LIL. The magmatic source of basic volcanic rocks was enrichment mantle being analogous to oceanic island basalts sources. 基性火山岩有磁性玄武岩与拉斑玄武岩两个岩浆系列,且富集LREE与LIL,其岩浆源区为与洋岛玄武岩源相似的富集地幔柱源。
- The Cretaceous is an intraplate-rifting stage, characterized by representative geological elements such as AA-type granite, red down-faulted basins, bimodal subvolcanic rocks and basic volcanic rocks. 白垩纪为陆内裂谷阶段,形成的代表性地质要素有AA型花岗岩、大量陆相红色断陷盆地、基性火山岩、双峰式次火山岩等。
- The Early Proterozoic volcanic rocks of the Liaodong area are the important part of composition of Lower Proterozoic Liaohe Group.They are composed of two suites of the acid and basic volcanic rocks. 摘要辽东地区早元古代火山岩是下元古界辽河群地层的重要组成部分,它们由酸性和基性两套火山岩组成。
- These basic volcanic rocks underwent high pressure metamorphism for two times, at least, in which sodium amphibolites are formed by high pressure metamorphism with different genesis. 这些基性火山岩至少发生了两期高压变质,两期高压变质形成的钠质角闪石具有不同成因。
- Zongpu Group is distributed over the Shihuigou area, and consists of medium--basic volcanic rocks, volcanic clastic rocks interbedded with cherts, limestone, slate and metamorphic sandstone. 永登石灰沟一带奥陶系主要分布中堡群,其主要为中基性火山岩、火山碎屑岩夹硅质岩、大理岩、板岩及变质砂岩。
- Lithological study shows that it is a suit of Mg-rich basic volcanic rock, equivalent to kamatitie, which provides a great volume of magnesium for the deposition of Mg-rich borate deposit. 岩石学研究表明这是一套富镁质超基性火山岩,相当于科马提岩,作为辽东硼矿的容矿岩石,它为镁硼酸盐矿床的形成提供了丰富的镁质来源。
- Xinglongshan Group basic volcanic rocks 兴隆山群基性火山岩
- Origin and evolution of sodium amphibolite in metamorphic basic volcanic rocks from Yongquan area of Heilongjiang 黑龙江涌泉地区变质基性火山岩中钠质角闪石的成因及演化
- GEOCHEMISTRY AND TECTONIC AFFINITIES OF BASIC VOLCANIC ROCKS OF THE PALEOZOIC IN KARAKORUM AREA 东帕米尔及邻区古生界基性火山岩地球化学特征与构造属性
- Basalt is the commonest volcanic rock. 玄武岩是最普通的火山岩。
- GEOLOGICAL FEATURE AND CHRONOLOGY OF INTERMEDIATE- BASIC VOLCANIC ROCKS IN THE NORTHERN PART OF DANGHENANSHAN DISTRICTS IN QILIAN MOUNTAINS 祁连党河南山北坡中-基性火山岩地质特征及时代
- Discovery and tectonic significance of Permian Basic volcanic rocks in the Selong area on the northern slope of the Himalayas,southern Tibet 藏南喜马拉雅北坡色龙地区二叠系基性火山岩的发现及其构造意义
- A volcanic rock containing many amygdules. 杏仁岩有很多杏仁状小气孔的火成岩
- The hotel is a cave on a volcanic rock in fact. 洞穴酒店其实就是一个火山岩上的洞穴。
- Volcanic rocks have high susceptibilities under normal conditions. 火山岩在正常情况下有强的磁化率。
- Establish and Genesis of Oceanic Island Basic Volcanic Rock Early Carboniferous in Northern of Daxing'anling 大兴安岭北段早石炭世洋岛型玄武岩的确立及成因意义
- A light-colored volcanic rock composed largely of feldspars. 响石,响岩大部分由长岩组成的淡色的火山岩