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isotopic evidence
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  同位素证据
     REE, Sr, Nd, and Pb Isotopic Evidence for the Petrogenesis of the Shuiquangou Syenite Complex in NW Hebei Province, China
     张家口水泉沟正长岩杂岩体成因的REE和Sr、Nd、Pb同位素证据
短句来源
     CRUSTAL EVOLUTION IN ANHUI:Nd AND Sr ISOTOPIC EVIDENCE
     安徽的地壳演化:Sr,Nd同位素证据
短句来源
     Helium and oxygen isotopic evidence on the exchange of water between the West Pacific and the South China Sea
     南海与西太平洋海水的交换:氧、氦同位素证据
短句来源
     The Nd Isotopic Evidence for Late Paleozoic Oceanic Crust in Southern Margin of Yangtze Block
     扬子地块南缘晚古生代洋壳存在的Nd同位素证据
短句来源
     Petrological and Nd, Sr, Ph Isotopic Evidence for Genesis of Mesozoic Magmatic Rocks in Nanjing-Wuhu Area
     宁芜地区中生代岩浆岩的成因──岩石学与Nd、Sr、Ph同位素证据
短句来源
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  “isotopic evidence”译为未确定词的双语例句
     AN ISOTOPIC EVIDENCE FOR OCEANIC CRUST SUBDUCTION AND CRUST MANTLE RECYCLING IN MESO NEOPROTEROZOIC ALONG NORTHERN MARGIN OF YANGTZE CRATON
     扬子克拉通北缘中、新元古代洋壳俯冲及壳幔再循环作用的同位素地球化学证据
短句来源
     ORE-FLUID EVOLUTION OF THE XIAOXIGONG GOLD DEPOSIT HOSTED IN PROTEROZOIC METAMORPHIC ROCKS, GANSU PROVINCE, AS DEDUCED FROM SULFUR, OXYGEN, HYDROGEN AND LEAD ISOTOPIC EVIDENCE
     甘肃小西弓金矿床成矿物质来源和含矿流体运移轨迹同位素示踪
短句来源
     Evolution of Eclogite at Tiquishan, Northern Jiangsu Province: Isotopic Evidence
     苏北踢球山榴辉岩演化的同位素年代学证据
短句来源
     Isotopic Evidence for Multi-stage Ore-forming Processes after the Intrusion of Granite Porphyry in the Gupao Gold Ore District,Guangxi
     广西古袍金矿区花岗斑岩侵入期后多期热液成矿作用的Ar-Ar年龄证据
     Isotopic Evidence for Multi-stage Ore-forming Processes after the Intrusion of Granite Porphyry in the Gupao Gold Ore District, Guangxi
     广西古袍金矿区花岗斑岩侵入期后多期热液成矿作用的Ar-Ar年龄证据
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  相似匹配句对
     CRUSTAL EVOLUTION IN ANHUI:Nd AND Sr ISOTOPIC EVIDENCE
     安徽的地壳演化:Sr,Nd同位素证据
短句来源
     URANIUM AND THORIUM ISOTOPIC EVIDENCE FOR DETERMINING MINERALIZED SECTORS
     确定砂岩型铀矿矿化地段的铀、钍同位素证据
短句来源
     the isotopic method;
     古地磁法;
短句来源
     On the Category of Evidence
     关于证据种类之思考
短句来源
     EVIDENCE OBTAINING
     谈谈仲裁案件中的证据收集
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  isotopic evidence
Isotopic evidence for postsedimentary transformation of rocks of the Lower Cambrian Angara Formation in the Irkutsk Amphitheater
      
Isotopic provinces and formation stages of the continental crust in the Baikal-Muya Belt: Sm-Nd isotopic evidence for granitic a
      
Geological and isotopic evidence of Late Vendian magmatic events in restitic ultramafic mantle rocks of the Voikar-Syn'ya ophiolitic massif are considered and correlated with events at the eastern margin of the East European Platform.
      
The isotopic evidence indicates that the POC in the Yalujiang Estuary is predominantly of terrestrial origin rather than a result ofin situ plankton.
      
Isotopic evidence for uplift through extension A comparison of the cooling histories in two adjacent orthogneiss suites in Fiord
      
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Based on the determination and analysis of 27 isotopic samples of Hydrogen and oxygen from the mineral veins, the surrounding rocks and the fluid inclusions in quartz in the Xiaoqingling goldfield, this paper expounded the characteristics of the isotopic compositions of hydrogen,and oxygen and their genetic meaning in the goldfield.The writer holds that the mineralizing fluid may be a kind of mixed water which mainly consists of the atmospheric water,partly the magma-tic water and the metamorphic water .This...

Based on the determination and analysis of 27 isotopic samples of Hydrogen and oxygen from the mineral veins, the surrounding rocks and the fluid inclusions in quartz in the Xiaoqingling goldfield, this paper expounded the characteristics of the isotopic compositions of hydrogen,and oxygen and their genetic meaning in the goldfield.The writer holds that the mineralizing fluid may be a kind of mixed water which mainly consists of the atmospheric water,partly the magma-tic water and the metamorphic water .This paper provides an isotopic evidence for the metallotect theory on the strata-bound deposit,in which the gold-bearing beds should be related to the tectonization and the magmation during the Yanshan Stage.

本文在对小秦岭金矿脉、围岩、石英中气液包裹体等采取27个氢氧同位素样品并进行测试分析的基础上,论述了该金矿的氢、氧同位素组成特征及其成因意义,认为该金矿的成矿溶液可能是以大气降水为主,同时有岩浆水和变质水参加的混合水。这为该金矿床应属与燕山期构造及岩活动有关的层控矿床这一成矿理论提供了同位素方面的依据。

The Hetai gold deposit is located in Yunkai Mountain of western Guangdong, which is an important gold prospect area in South China. Based upon a detailed study on gold-bearing formation, two types of migmatite and characteristics of the gold deposit, the authors hold that the Sinian C Formation(Z~c) is the most important gold-bearing formation in this area, which provided the Hetai gold deposit with large quantities of ore materials. The regional metamorphism and basement migmatitization accompanying Yunan orogeny...

The Hetai gold deposit is located in Yunkai Mountain of western Guangdong, which is an important gold prospect area in South China. Based upon a detailed study on gold-bearing formation, two types of migmatite and characteristics of the gold deposit, the authors hold that the Sinian C Formation(Z~c) is the most important gold-bearing formation in this area, which provided the Hetai gold deposit with large quantities of ore materials. The regional metamorphism and basement migmatitization accompanying Yunan orogeny caused the activation and transference of gold in the gold-bearing formation. Later, a further enrichment of gold took place in the fractural-metamorphic migmatite zone during the fractural metamorphism, and the Hercynian-Indosinian granitic activities once again stimulated the activation and enrichment of gold. The muscovite pegmatite, an evolution product of the granite, is closely related to orebodies in space, time and genesis. The Sihui-Wuchuan fault and its secondary faults have been repeatedly activated since the Caledonian orogeny. in profile, the gold deposit is strictly controlled by the mylonite zone and displays obvious zoning. From the wall rock to the orebody, gold and other metallogenic elements increase gradually. The ore-forming solutions are characterized by Na~+>K~+>Ca~(2+)>ΣFe>Cu~(2+), HCO_3~->C1->F->S~(2-) and CO_2>CH_4, the ore-forming temperature is 200-280℃, ore-forming pressure about 566 atm(573 x 10~5Pa), and of_2, 10~(-37)-10~(-39). Gold and major cations and anions in ore-forming solutions increase steadily from early stage to late, and the isotopic evidence demonstrates that the ore-forming solutions are mixtures of metamorphic and meteoric waters, with the participation of a little magmatic water.

产于麋棱岩带的河台金矿是一种新的金矿类型。地质及地球化学研究表明主要控矿因素有:①矿源层(含金建造)——提供金的来源;②混合岩化及花岗岩岩浆热液作用——促使金发生活化转移;③韧性剪切带——提供了导矿通道及容矿空间。矿床形成于中温(250℃)、中深(573.5×10~5Pa)的条件。成矿流体富含HCO_3-及CO_2,并具Na~+>K~+>ca~(2+),HCO_2~->C1~->F~->ΣS,CO_2>CH_4的特点。介质从早到晚由中性到弱碱性,氧逸度f_(o2)为10~(-37)-10~(-39)。矿床是多阶段长期演化发展的产物,区域变质作用,动力变质作用,混合岩化作用过程中变质热液起着主导作用,海西—印支期断裂重熔岩浆热液活动使金局部富集。在此认识基础上,提出了河台金矿的成矿模式。

In SE China the Fuzhou plutonic complex is made up of two major suites:a) A calc-alkaline suite (Danyang, Fuzhou) emplaced about 105-100 Ma ago (Rb-Sr ages). These granitic rocks show a calc-alkaline differentiation trend, with fractionation of plagioclase and hornblende. Sr and Nd isotopic evidence suggests that ancient crustal material has played an important role in the magma genesis.b) An alkaline suite intruded about 90 Ma ago (Kuiqi, Bijiashan). It is composed of hypersolvus per-alkaline granites,...

In SE China the Fuzhou plutonic complex is made up of two major suites:a) A calc-alkaline suite (Danyang, Fuzhou) emplaced about 105-100 Ma ago (Rb-Sr ages). These granitic rocks show a calc-alkaline differentiation trend, with fractionation of plagioclase and hornblende. Sr and Nd isotopic evidence suggests that ancient crustal material has played an important role in the magma genesis.b) An alkaline suite intruded about 90 Ma ago (Kuiqi, Bijiashan). It is composed of hypersolvus per-alkaline granites, which show little magmatic differentiation. These rocks are characterized by high abundances of REE. Sr and Nd isotopic data indicate that crust involvement was not significant.The petrogenetic study suggests that the successive intrusions of that complex were emplaced progressively at higher crustal levels. The calc-alkaline suite is typical of those emplaced in subduction-zone environments, whereas the hyperalkaline suite is associated with major deep crustal faults.

中国东南部福州复式岩体主要由两个岩套构成:(1)钙碱性岩套(丹阳岩体、福州岩体)侵位于约105—100Ma前(Rb-Sr年龄)。这些花岗岩显示了有斜长石和角闪石分离的分异作用。Sr和Nd同位素证据说明老地壳物质在岩浆形成中起了重要作用。(2)碱性岩套(魁岐岩体、笔架山岩体)侵位于90Ma前。这个岩套主要由超溶线过碱性花岗岩组成。这些过碱性花岗岩的岩浆分异作用很微弱,特征是稀土含量高。Sr和Nd同位素资料表明,在岩浆形成过程中地壳物质带入未起重要作用。 由岩石成因研究可见,福州复式岩体是逐渐连续侵位于地壳上部。钙碱性岩套是侵位于俯冲带的典型岩套,而碱性岩套则与较大的地壳深断裂有关。

 
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