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- A siliceous rock of chalcedonic or opaline silica occurring in limestone. 硅石出现在灰岩中的玉髓或蛋白色硅石
- The main kinds of rocks include carbonate rocks, tuffite, siliceous rocks and quartz sand-stone. 主要岩石类型包括碳酸盐岩、沈积凝灰岩、矽质岩和石英砂岩。
- The calcareous and siliceous rock deposits of springs, lakes, or ground water. 泉华泉、湖或地下水中的。
- Laminated siliceous rocks in country rocks might represent the nature of the Devonian hydrothermal sedimentary rocks. 围岩中的层纹状硅质岩可能代表了泥盆纪时期的热水沉积岩性质。
- Abstract: Sedimentation_exhalation siliceous rocks are of great significance in the study of ore deposits. 中文摘要: 喷流_热水沉积硅质岩对于矿床研究具有重要意义。
- Skarnization siliceous rocks in the lower Ordovician Tieshidasi group is one of the dominant host rocks of Kendekeke cobalt-gold deposit. 上奥陶统铁石达斯群夕卡岩化硅质岩是东昆仑肯德可克钴金矿床的主要围岩之一,具有沉积结构构造。
- The overlying siliceous rocks were not influenced by hydrothermal activity, and they are deposited on the margin of a hydrothermal basin. 矿体顶板上覆地层中的硅质岩基本没有受到热水活动的影响,沉积于盆地边缘的构造环境;
- The Dalong Formation in Guangyuan area in northwestern Sichuan Basin is mainly composed of interbeds of carbonate rocks, siliceous rocks and shales. 摘要四川盆地西北广元地区上二叠统大隆组主要为碳酸盐岩、硅质岩和页岩互层沉积。
- They are usually claret fied into two main type, namely that of siliceous rocks and that of valcanic rocks, and distributed in a certain pattern. 分矽卡岩型和火山作用型两类。其分布有一定规律。
- The ratios of Fe/Ti, (Fe+Mn)/Ti, Al/(Al+Fe+Mn) and U/Th, and Al Fe Mn and Fe Mn (Ni+Co+Cu) diagrams show that the siliceous rocks are the sedimentary rocks of hydrothermal origin. Fe/Ti、(Fe+Mn)/Ti、Al/(Al+Fe+Mn)、U/Th比值及Al?Fe?Mn、Fe?Mn?(Ni+Co+Cu)三角图均表明岩石为热水来源沉积岩。
- Thus, the "radiolarian cherts" and the siliceous rock of Maokou Formation are diferent lithostratigraphic units. 因此,两者应分属不同的地层单位。
- It occurs in the siliceous rock of Cambrian Hetang group, the ore-body displays occurrence in the form of beds, pralleling wi... 在油漆中替代沉淀硫酸钡和滑石粉。用硅土作填料,具有提高产品的性能和质量,可降低生产成本,增强企业活力。
- Raw materials include breccia,siliceous rhyolite,quartzite,jasper,agate,dacite,obsidian and crystal,with breccia and siliceous rock being the most important stone materials. 两类细石核所采用的原料包括火山角砾岩、硅质岩、流纹岩、石英岩、碧玉、玛瑙、英安岩、黑曜岩及水晶等9种,以火山角砾岩和硅质岩为主,原料利用方面没有大的差别。
- In Yutangba selenium deposit, the REE content of siliceous rocks is Iow(38.9x10-6), and enriched in LREE. In Ziyang selenium-rich area, it is from (12.0-37.6)x10-6, In both of two areas, there exist Ce negative anomaly and Eu positive anomaly. 渔塘坝硒矿区硅质岩的REE总量较低,平均为38.;9×10~(-6),紫阳硒富集区硅质岩REE总量除个别较高(达110×10~(-6)以上)外,总体也较低(12
- The Fuwan superlarge silver deposit is hosted in the Early Carboniferous limestones along a contact fault zone between the limestone and the overlying Changkeng Au-hosting siliceous rocks. 富湾超大型银矿床主要为脉状,产于下石炭统灰岩与长坑赋金硅质岩接触带及其下的破碎带中。
- Ding Zhenju, Liu Congqiang.Ancient hydrothermal system in Bikou Group: Evidence from REE characteristics of iron-rich siliceous rocks[J].Progress in Natural Science, 2000, 10(5) :427 - 434. [7]丁振举;刘丛强.;碧口群古热水系统发育的富铁硅岩稀元素地球化学证据[J]
- During ealy-middle Silurian, episodic-fluid activity produced albite rock, barite rock, ferruginous carbonate rock, siliceous rock and ore deposits of Pb-Zn and mineralization of Au. 早、中志留世继续发展,形成了钠长石岩、重晶石岩、铁碳酸盐岩、硅质岩与铅-锌、金矿床;
- The prominent characteristic of the siliceous rock is the residual bioclastic structure, with plenty of silicified calcareous organisms, such as brachiopoda, encrinite caudex and coral, which are several millimeters in size. 其显著特征是,岩石具残余生物碎屑结构,见大量腕足类、海百合茎、珊瑚等钙质生物假象,主要为mm级完整个体,密集堆积。
- Introduction: Radiolarians ans Siliceous Rocks; 放射虫类与硅质岩介绍;
- Navigation is difficult on this river because of the hidden rocks. 因为河上有暗礁,所以在这条河上航行很困难。