即使矿源比承租人预测的要少，或者矿源是不可开采的形式，这也是不可退还的。
This is nonrefundable, even if the source of the mineral is less prevalent than the lessee predicted it to be or if it is in an unextractable form.
这个煤矿因矿源枯竭而被关闭。
因此，找矿重点是寻找矿源层。
这煤矿因矿源枯竭而关闭了。
三类矿源岩石组合提供金质。
矿源层为中三叠统浊积岩。
矿源层是某些类型金矿成矿的必要条件之一。
The feature of the source bed is the essential condition for the formation of gold deposits of cer-tain types.
二云母片岩不仅是矿源层，而且还是赋矿围岩。
Two mica schists are considered to be the source bed and host rock of gold.
厚达几千米的火山岩系为成矿提供了丰富的矿源；
The volcanic rocks thousands meters in thickness serve as the ore source for the metallization.
大峪口工程在确定二次磷矿源时遇到了很大困难。
The Dayukou project met with a great difficulty in deciding on the source of secondary rock.
花岗岩不仅使金活化转移，而且也是第二矿源层。
The granites not only caused the remobilization of gold but also serve as the secondary source bed.
寻找新矿源代替已经枯竭的矿层变得越来越困难。
Finding new seams to replace depleted ones is becoming harder.
上震旦统灯影组前震旦系康定群是本区有利矿源层。
The favorable source beds in this district are Presinian Kangding Group and DengyingFormation of upper Sinian series.
老挝有色金属矿源丰富，但开发技术等方面力量薄弱。
Laos boasts nonferrous mineral resources, but is weak in development technology.
浅部石英斑岩为含矿岩体，深部花岗斑岩为矿源岩体。
The shallow quartz porphyry is ore-bearing massif and the deep granite porphyry is ore-origimating one.
成矿受矿源层、地层岩性、气候、构造、地貌等因素控制。
The mineralization of the bauxite deposits is controlled by source-bed, lithology, climate, structure and geography.
成矿作用以特有的断层—不整合面复合构造控制和改造锡矿源层；
The mineralization was controlled by the specific fault- unconformity composite tectonics and by the transformation of tin source bed.
在杨子地块北缘的被动陆缘拉张海盆形成了与沉积有关的矿源层。
In contrast, sedimentation related source beds were traceable to some basins caused by tensional events along the northern margin of the Yangtze massif.
同生沉积（成岩）作用形成矿源层，后期改造（叠加）形成矿体。
The metallogenetic model is that the ore origin bed was formed by syngenetic sedimentation (diagenesis) and the ore body by the later reformation (superimposition).
发现的很多工具都是由黑曜石制成，而最近的矿源在60英里之外。
Many tools found were of obsidian, whose closest source was a 60-mile trek away. (Perhaps why they needed shoes, Dr. Areshian suggested.)
这一成矿系统是同一能量场和流体场、不同矿源场之间耦合的结果。
The metallogenic system is the couple results of the same energy field, fluid field and different ore source field, and has good potential for ore prospecting.
认为含矿岩系的物源主要来自海底火山喷发作用形成的黄铁矿化矿源层。
According to the study of the mineral evolving, origin analysis etc., it is considered that the source of minerals etc mainly comes from the pyritization sources of the submarine volcano eruption.
矿床的形成是在板溪群矿源层的基础上，经构造—变质作用的改造富集而成。
The deposits were formed on the foundation of the source beds of Banxi Group through reworking and enrichment of structural metamorphism.
四川若尔盖北部寒武系太阳顶群为金矿矿源层，硅质岩为其中的主要组成部分。
Cambrian Taiyangding Group, located in the northern part of Ruoergai in Sichuan province, is an important gold-bearing formation.
即地洼盆地沉积前基盘构造控制了盆地的形态及矿源层的展布方向和物质来源；
That is' the structures before sedimenting control the shape of basin, the distributed directions of source beds and the material source;
区域地层岩石中微量元素分析结果显示，前泥盆系浅变质碎屑岩是主要的矿源层。
The results of trace element analysis of regional stratigraphy show that slightly metamorphosed pre Devonian clastic rocks are main source strata for gold and antimony deposits.
通过对矿区矿石、岩石中铅、硫、氧同位素组成研究，查明青龙村群为金的矿源层。
Based on the research of isotope ratios of lead, sulfur, oxygen and carbon in the ores and rocks of this area, it is held that Qinglongcun Group serve as the source bed of gold.
通过对矿区矿石、岩石中铅、硫、氧同位素组成研究，查明青龙村群为金的矿源层。
Based on the research of isotope ratios of lead, sulfur, oxygen and carbon in the ores and rocks of this area, it is held that Qinglongcun Group serve as the source bed of gold.
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