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subeconomic
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  “subeconomic”译为未确定词的双语例句
     On Constructing Subeconomic Zone of the Central Shaanxi Plain
     关于建设关中次级经济区的思考
短句来源
     The results of calculationshow that economic resources above depth 2000m isequivalent to 180Mt normative coal, whereas between2000--3000m, subeconomic resources is equivalent to149Mt uormative coal, Most of the geothermal anom-alous areas are distributed in or nearby citiers ortowns which may be developed first.
     主要热含水层是上第三系的砂岩层,为孔隙-裂隙型热水,占可采资源的45.1%(深度按2000m计); 寒武-奥陶系、中土元古界的灰岩层,为岩溶-裂隙型热水,占可开采资源的54.9%,是最有希望的采开层。
短句来源
     Lengshuikeng ore deposit is known as a large scale Ag, Pb and Zn porphyry deposit,in which subeconomic chalcopyrite mineralization has also been found in the centre and the deep part of the mineralized granitic porphyry.
     江西贵溪冷水坑矿床为一大型一超大型Ag、Pb、Zn矿床,在矿床深部和矿化花岗斑岩体的中心部位有铜矿化现象,但未构成工业矿体。
短句来源
  相似匹配句对
     On Constructing Subeconomic Zone of the Central Shaanxi Plain
     关于建设关中次级经济区的思考
短句来源
     Lengshuikeng ore deposit is known as a large scale Ag, Pb and Zn porphyry deposit,in which subeconomic chalcopyrite mineralization has also been found in the centre and the deep part of the mineralized granitic porphyry.
     江西贵溪冷水坑矿床为一大型一超大型Ag、Pb、Zn矿床,在矿床深部和矿化花岗斑岩体的中心部位有铜矿化现象,但未构成工业矿体。
短句来源
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  subeconomic
Accordingly, concealed Carlin-type fossil hydrothermal systems of this type, even if subeconomic for gold, could contain commercial concentrations of oil.
      
These subeconomic pest populations foster an entomophagous fauna.
      
These characteristics of plants, among others, and the limitations of artificial control measures permit the maintenance of subeconomic levels of pests in agricultural crop areas.
      
Skarn and syenite are cut by pink biotite-calcite veins, containing magnetite + pyrite and subeconomic gold-silver mineralization (Au/Ag?=?0.2).
      
Other dacitic intrusions are associated with subeconomic deposits that formed synchronously with the mineralized porphyries at Bajo de la Alumbrera.
      
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The assessment, of geothherinal resources is madeby means of calculation with volumetric method foreach waler district and water bearing horizon, withthe concerned parameters coming from numerousdrillings and experiments. The results of calculationshow that economic resources above depth 2000m isequivalent to 180Mt normative coal, whereas between2000--3000m, subeconomic resources is equivalent to149Mt uormative coal, Most of the geothermal anom-alous areas are distributed in or nearby citiers ortowns which...

The assessment, of geothherinal resources is madeby means of calculation with volumetric method foreach waler district and water bearing horizon, withthe concerned parameters coming from numerousdrillings and experiments. The results of calculationshow that economic resources above depth 2000m isequivalent to 180Mt normative coal, whereas between2000--3000m, subeconomic resources is equivalent to149Mt uormative coal, Most of the geothermal anom-alous areas are distributed in or nearby citiers ortowns which may be developed first.

华北平原北部面积约17×10~4km~2,是中、新生代形成的大型断陷盆地,蕴藏着丰富的中低温热水,千米深温度达52-74℃,3000m达108-125℃,热流值变化在1.11-2.53HFU之间。 主要热含水层是上第三系的砂岩层,为孔隙-裂隙型热水,占可采资源的45.1%(深度按2000m计);寒武-奥陶系、中土元古界的灰岩层,为岩溶-裂隙型热水,占可开采资源的54.9%,是最有希望的采开层。上述热水层在异常区均具有埋藏浅、水质好、水量大的特点。 资源评价是按体积法进行分区、分层计算,有关参数是根根大量的钻孔统计和实验资料得出的。计算结果:深度2000m的经济资源相当于180Mt标准煤;深度2000-3000m的亚经济资源相当于149Mt标准煤。多数异常区分布在城市或城镇附近,可优先集中开发。(本文仅对区内2000m及3000m深度范围内的地热资源进行初步评价。)

Lengshuikeng ore deposit is known as a large scale Ag, Pb and Zn porphyry deposit,in which subeconomic chalcopyrite mineralization has also been found in the centre and the deep part of the mineralized granitic porphyry. In the deep part, the chalcopyrite associates with pyrrhotite and cubanite and formed at temperatures up to 360℃ while the chalcopyrite+ pyrite+Fe-chlorite assemblage disseminates the centre and the upper part of the granitic porphyry and is, in the revealed range,gradually disappeared...

Lengshuikeng ore deposit is known as a large scale Ag, Pb and Zn porphyry deposit,in which subeconomic chalcopyrite mineralization has also been found in the centre and the deep part of the mineralized granitic porphyry. In the deep part, the chalcopyrite associates with pyrrhotite and cubanite and formed at temperatures up to 360℃ while the chalcopyrite+ pyrite+Fe-chlorite assemblage disseminates the centre and the upper part of the granitic porphyry and is, in the revealed range,gradually disappeared as the granitic porphyry becomes thinner and thinner with depth. The distribution of this mineral assemblage disproves the argument that its formation temperature is higher than that of Ag, Pb and Zn mineralization and suggests that it is developed in less permeable wall rocks.In order to find out the factors controlling the geochemistry of Lengshuikeng deposit, an fluid geochemical numeric modelling of the ore-forming proccess from 360℃ to 175℃ is made, based on the assumption that Lengshuikeng ore-forming fluid is analogous to H_2S-CO_2-bearing NaCl hydrathermal solution, in which pyrrhotite,chalcopyrite, galena, sphalerite, argenite and gold are presumably saturated at 360℃. According to the mineral assemblage and the physico-chemical conditions of the ore-forming system, the solubilities of Fe, Cu, Pb, Zn, Ag and Au in the ore-forming fluid are, respectively, controlled by the dissolution reactions of pyrite (or pyrrhotite, depending on the js_2 of the fluid system), chalcopyryte, ganenla, sphalerite, argentite and nature gold. There are 48 chemical species concerned in the calculation which are considered to be dominate in the fluid system. The modelling result is in general consistent with the mineral formation sequence and provides a most resonable explanation for the mineral zonation of Lengshuikeng deposit. Moreo ver, it indicates that Lengshuikeng ore-forming fluid is rich in copper at 360℃, but its geochemical evolution is not favourable for copper deposition and accumulation,which would be the major cause accounting for the subeconomic metallization of copper in Lengshuikeng deposit. Therefore, as the geochemistry of its source is concerned, economic copper deposits would be expected to develop in suitable geological and geochemical enviorenments in this region. However, the absence of economic gold deposition in Lengshuikeng ore deposit suggests that its source would be Poor in gold of being easy to be mobilized.

江西贵溪冷水坑矿床为一大型一超大型Ag、Pb、Zn矿床,在矿床深部和矿化花岗斑岩体的中心部位有铜矿化现象,但未构成工业矿体。本文将冷水坑成矿体系作为一种含H_2S、CO_2以及Fe、Cu、Pb、Zn、Ag、Au等金属元素的NaC1型降温成矿热液体系,根据矿床的矿物共生组合及其成矿物理化学条件,认为上述各金属元素在成矿热液中的饱和浓度应分别受黄铁矿或磁黄铁矿了黄铜矿、方铅矿、闪锌矿、辉银矿和自然金的溶解反应控制,并在假定模拟起始温度条件下各金属元素的浓度分别等于其饱和浓度的基础上,对上述金属元素在360-175℃温度区间内的迁移与沉淀过程进行了计算机数值模拟,在模拟过程中有48种溶解类型参加了计算。其结果不仅与矿床的矿物生成序列基本一致,合理地解释了冷水坑矿床的矿化与蚀变分带,更重要的是,模拟结果还表明,冷水坑成矿热液中富含Cu,但由于其成矿体系的地球化学演化不利于Cu的沉淀和富集,因而未形成工业铜矿体,从而得出了富含金属元素的热液不一定成矿的结论。因此,就冷水坑矿床源区的成矿地球化学特征而言,完全有可能在适宜的地质和地球化学条件下形成具有较大经济价值的铜矿床。冷水坑矿床中缺少具有经济价值的金矿化则表明其矿源中?

The North Qaidam and East Kunlun orogen (NKO), located in northwest Qinghai Province and the northeastern margin of Qinghai-Tibet plateau, is a part of the Qighai lug- Qiilian-Kunlun oroge us of West China. Being a multiple orogen, it underwent Caledonian accretionary orogeny and intensive overprinting orogeny from Late Variscan to Early Mesozoic, characterized by archipeingic ocean/aulacogen, soft collision and multicyclicity. Tens of orogenic gold dePOsits and mineral occurrences were discovered in the NKO,...

The North Qaidam and East Kunlun orogen (NKO), located in northwest Qinghai Province and the northeastern margin of Qinghai-Tibet plateau, is a part of the Qighai lug- Qiilian-Kunlun oroge us of West China. Being a multiple orogen, it underwent Caledonian accretionary orogeny and intensive overprinting orogeny from Late Variscan to Early Mesozoic, characterized by archipeingic ocean/aulacogen, soft collision and multicyclicity. Tens of orogenic gold dePOsits and mineral occurrences were discovered in the NKO, in which thirteen orogenic gold deposits are reviewed in this paper. Occurring near the deep faults and/or collisional belts, they are located at convergent plate margins in accretionary and/or collisional orogeny and controlled by threeorder structural systems. Although the wallrocks of these orogenic gold deposits vary in age and petrology, all of them were deformed and metamorphosed into greenschist factes. Their alterations are planar and nonzonational, and exhibit strong silicification, pyritization and sericitization in or near the orebody. The form, occurrence and size of the ore body are controlled by structures. According to ore types, the orogenic deposits in the NKO can be grouped into two subtypes, namely altered rock type in the shattered zone and quartz vein type. As a result of dePOsition from low-salinity H2O-NaCI-CO2 I CH4 N2 fluids, both of them are characterized by high Au/Ag ratios, low base-metal content and varied As and Sb content, varying from An-As in the northern part of the NKO to Au-Sb in the southern part of the NKO. Field observation and Ar-Ar isotope dating show that gold mineralizations have two groups of ages, viz. late Caledonian (425--400 Ma) and late Variscan-Indosinian (296 - 200 Ma). From north to south, the depths of these orogenic gold deposits changed from the top of the middle crust and the bottom of the upper crust (15. 4 - 7. 3km) to the upper crust (5. 7-1. 2 km). Subduction-related thermal events and episodically rising geothermal gradients within the hydrated accrehonary sequences initiated and drove long-distance hydrothermal fluid migration. The gold of the orogenic deposits was initially concentrated in shear zones at the lower part of the upper crust during late Caledonian subductional orogeny by the heated CH4-CO2-NaCl-H2O fluids, whereas the gold ores were mainly emplaced at the depth of 5.7 - 1.2 km during the Late Variscan to Early Mesozoic orogeny through the heated CO2-NaCl-H2O fluid mainly by granitic magmatism. An initial subeconomic gold mineralization related to Late Caledonian ductile deformation resulted in the concentration of ore-forming elements in the large-size shear zone, while the structural-hydrothermal-mineralization during the Late Variscan to Early Mesozoic orogeny formed the commercial gold ores.

柴北缘-东昆仑是中国西部秦祁昆褶皱山系的一部分,它的显生宙造山经历了加里东和晚华力西-印支两个旋回,并以多岛洋/裂陷槽、软碰撞和多旋回造山为特点。该区已发现多个造山型金矿床,它们具有相似的地质、地球化学特征。有两组成矿年龄:一是晚加里东期(相当于加里东造山晚期);二是晚华力西—印支期(处于该造山族回晚期)。前期为发生于中地壳顶部一上地壳底部的金矿化,后期则是形成于较浅层次(1.2~5.7km)的金矿体侵位。自区域北部向南部,矿床元素组合由Au-As向Au-Sb转化,金成矿年龄由老变新,成矿深度相应变浅。研究认为,与碰撞有关的热事件以及逐步升高的地热增温率,驱动被加热的建造水和大气降水流体沿碰撞带和大型剪切带长距离地迁移、活动,并淋取围岩的成矿元素,形成含金流体。在进人到矿床或矿体构造后,由于构造性质转换,物理化学条件亦随之改变,含金流体沉淀,形成金矿体。这些金矿床形成于造山晚期,是造山作用的产物,后者为前者提供了空间、热一动力条件。

 
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