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浅色
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  leucocratic
    SHRIMP DATING OF OPHIOLITE AND LEUCOCRATIC ROCKS WITHIN OPHIOLITE
    蛇绿岩及蛇绿岩中浅色岩的SHRIMP U-Pb测年
短句来源
    These age data are consistent with those (Zircon U-Pb ages, 180 -200Ma) of the leucocratic granites from the Mining Altai and Mountainous Altai of the former Soviet Union, which are located in the same tectonic unit as the studied region.
    以上数据和与本区处在同一构造单元的前苏联矿区阿尔泰及山区阿尔泰12个浅色花岗岩结石U-Pb年龄180-200Ma的结果一致;
短句来源
    Composed mainly of anorthosite and plagiogranite, the leucocratic rocks show distinct Eu positive anomaly. The REE parametric diagram and variations of Nb/Ta and Zr/Hf values suggest crystallization segregation, characterized by enrichment of incompatible elements such as Sr, Ba, Nb, Ta, Zr and Hf and depletion of Compatible elemelnts like Sr, V, Co and Ni.
    浅色岩的正Eu异常明显,REE参数图解、Nb/Ta和Zr/Hf值等均呈现分离结晶趋势,不相容元素Sr、Ba、Nb、Ta、Zr、Hf富集,相容元素Sc、V、Co、Ni亏损,并与其寄主岩———蛇纹岩形成强烈的互补关系。
短句来源
    Leucocratic gabrro,located at Rushan in Sulu orogenic belt,was formed in Late Mesozoic (ca.120 Ma) and contains SiO_2 of 53%~55%,lower MgO of 3.6%~4.9%,enriched LREE,LILE and depleted HFSE like Nb,Ta,Ti etc,indicting evident “crustal” fingerprint.
    位于苏鲁造山带的乳山浅色辉长岩形成于晚中生代(约120Ma),SiO_2含量为53~55%,MgO 含量较低,为3.6~4.9%,富集轻稀土元素(LREE)和大离子亲石元素(LILE),亏损高场强元素,如 Nb、Ta、Ti 等,具有明显的“地壳”印记。
短句来源
    The igneous petrotectonic assemblages formed in the orogenic process include: (1)ophiolite complex assemblage, composed predominantly of the ultramafic-mafic cumulates,minor metamorphic peridotite, pillow lava, cherts and leucocratic granites as well. Geological and geochemical characteristics indicate that ophiolite complex is classified as“SSZ”(supra-subduction zone) type;
    与造山过程相关的岩浆作用包括:(1)蛇绿杂岩组合,以超镁铁质-镁铁质堆晶岩类为主,少量变质橄榄岩、枕状熔岩、硅质岩和浅色花岗岩,岩石地球化学特点指示其属SSZ型蛇绿岩,;
短句来源
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  “浅色”译为未确定词的双语例句
    Geochemical characteristics of leucogranitic dikes and sheared granites in the Yunmeng Mountains, northeastern Beijing
    北京云蒙山浅色花岗岩脉及韧性剪切变形的地球化学特征
短句来源
    (4) (100) and (111) crystal faces of zircon are much developed where Si, K and Na contents of granitoids are relatively low in the G angdisi belt, while(110), (311)and(131) faces of zircon are extensively seen in the Lhagio-Gangri and the Himalayan belt whose granites have higher contents of Si, K and Na;
    在冈底斯带花岗岩中的Si和K+Na含量低时,锆石多出现(100)和(111)晶面,而拉轨岗日岩带和喜马拉雅岩带浅色花岗岩中的Si、K、Na含量较高时,锆石则多出现(110)、(311)和(131)晶面;
短句来源
    We have advanced the method for the, determination of the plagioclase initial diffusion conditions according to the characteristics of the plagioclase phase diagram and this model.
    作者根据斜长石的相图特征并应用该模型,提出了如何确定斜长石扩散初始条件的方法,描述了湖北省凤凰关地区混合岩浅色体中斜长石的均匀化作用;
短句来源
    (4)Al2O3, Fe2O3, TiO2, and immobile and incompatible elements (such as LREE, Th, Hf and Zr) enriched in the leucosome.
    ③矿物成分和组合指示曾达到深熔条件; ④浅色体中富含Al2O3、Fe2O3、TiO2和不活动、不相容元素,如LREE、Th、Hf、Zr。
短句来源
    They enriche in Al,LILE,LREE,and deplet in HFSE and belong to the high-Al gabbro with calc-alkaline evolution trend.
    浅色辉长岩富Al、LILE、LREE,贫HFSE,为高铝辉长岩,具钙碱性演化趋势。
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  leucocratic
The Late Ordovician age (454 ± 5 Ma) is established for leucocratic granites of the Un'ya massif.
      
Large boron isotopic fractionation during magmatic-hydrothermal processes in the Lavicky leucocratic two-mica granite, Czech Rep
      
Zircon U-Pb and geochemical analyses for leucocratic intrusive rocks in pillow lavas in the Danfeng Group, north Qinling Mountai
      
Field observation showed that there are many irregular leucocratic intrusive rocks in pillow lavas in the Danfeng Group in the Xiaowangjian area, north Qinling orogenic belt.
      
Photomicrographs indicated that the protoliths of those altered leucocratic intrusive rocks are dioritic rocks.
      
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This paper deals chiefly with the facies changes and controlling factors of theChangxing Limestone in the Changxing area, Zhejiang province. There are apparentdifferences in thickness and lithology of the Changxing Limestone. Over a distanceof about 10 km from Meishan of Changxing county to Niutoushan of Guangdecounty, the thickness dramatically decreases from over 50 m to zero; whereas tothe east of Meishan, at the sections of Huangzishan of Huzhou and Xishan of theTaihu Lake, the thickness increases to over...

This paper deals chiefly with the facies changes and controlling factors of theChangxing Limestone in the Changxing area, Zhejiang province. There are apparentdifferences in thickness and lithology of the Changxing Limestone. Over a distanceof about 10 km from Meishan of Changxing county to Niutoushan of Guangdecounty, the thickness dramatically decreases from over 50 m to zero; whereas tothe east of Meishan, at the sections of Huangzishan of Huzhou and Xishan of theTaihu Lake, the thickness increases to over 100m. The Changxing Limestone in thevicinity of Meishan, Changxing, is dark--coloured, bituminous, flatly stratified, mostlymedium--to thick--bedded, and contains abundant layer--like or lenticular chert;whereas the limestone in Huangzishan and Xishan is light--coloured, mostly thick--to very thick--bedded, and contains rare chert. There are also appreciable differen-ces in fossil appearance between the Changxing Limestone of Meishan and that of Huangzishan and Xishan. The factors causing these differences within such alimited extent are: (1) After the deposition of the alternating marine and continentalLongtan Formation the time when the Changxing Formation began to be depositedwas not synchronous in different places. There was a sea-wall in the western partof the study area, and the Changxing Formation sediments overlapped westwards.In other words, there was a depositional break between the Longtan Formationand the Changxing Formation in some places; for example, at the Qiaomaigang andTuzishan sections. (2) Sedimentary environments varied from area to area. TheHuangzishan--Xishan area is marked by a carbonate rock platform, while theMeishan area by a depression in front of a platform. Some geologists consider thatthe upper part of the Changxing Formation is absent and that there was a deposi-tional break between the Permian and Triassic deposits. The authors, however, holdthat the break does not lie in the upper part of the Changxing Formation but insome local places in the lower part of the formation and that the depositionbetween the Permian and Triassic was continuous in most areas. The ChangxingFormation is wholly lacking at Niutoushan; the Triassic Yingken Formation directlyoverlies the Longtan Formation and is characterized by a weathering crust and aconglomerate bed.

本文主要讨论浙江省长兴地区长兴组灰岩的变化及控制因素。长兴组灰岩在厚度及岩性方面有明显的变化,从长兴县的煤山向西到广德县的牛头山,大约在10km距离内、厚度从50m逐渐减少,甚至完全消失。而从煤山向东到湖洲黄芝山,厚度增加到大于100m。煤山长兴灰岩呈灰黑色,含沥青,成层平整,含丰富的透镜状燧石。而黄芝山等剖面的长兴灰岩呈浅色,很少含沥青和燧石,厚-巨厚层,成层不清楚。在化石群方面也有明显差别。控制这些变化的因素有两个,一是在海陆交互相的龙潭期沉积后,在研究区的西部有一海堤,长兴期沉积由煤山向西超覆,长兴灰岩的下部在一些剖面上缺失.另一个因素是沉积环境不同,湖州-苏州一带为碳酸盐岩台地,而在煤山-广德的独山一带为台前凹陷。

According to the sedimentary and palaeontological features, the“Tiaomajian Formation”in central Hunan may be redivided into two parts: the upper part is Tiaomajian Formation, while the middle-lower part is considered to be Banshan Formation. The Tiaomajian Formation is composed chiefly of light coloured clastic rock yielding Bothriolepis-Lepidodendropsis assemblage. The Banshan Formation consist of purplish red clastic rock yielding Protopteridium-Psilophytites assemblage. The Bothriolepis-Lepidodendropsis...

According to the sedimentary and palaeontological features, the“Tiaomajian Formation”in central Hunan may be redivided into two parts: the upper part is Tiaomajian Formation, while the middle-lower part is considered to be Banshan Formation. The Tiaomajian Formation is composed chiefly of light coloured clastic rock yielding Bothriolepis-Lepidodendropsis assemblage. The Banshan Formation consist of purplish red clastic rock yielding Protopteridium-Psilophytites assemblage. The Bothriolepis-Lepidodendropsis assemblage is characterized by the presence of Bothriolepis and Hunanolepis. It contains, among the fossil plants, some for-ms in common with those of the Protopteridium-Psilophytites assemblage, such as Psilophytites, Hostomella and Dawsonites. These fossils apparently show a close affinity between the two assemblages. It is possible that Tiaomajian Formation be-longs to the early middle Devonian as the Banshan Formation.

分布在湘中地区涟邵境内的跳马涧组可作新的划分。该组中下部含Protopteridium—Psilophytites等植物化石的紫红色碎屑岩系应为半山组。上部产Bothriolepis—Lepidoden-dropsis组合的浅色碎屑岩系则刚好相当于长沙地区的跳马涧组。 Protopteridium—Psilophytites组合与Bothriolepis—Lepidodendropsis组合既各具特色,但又有不可分割的联系,如Hostomella.Psilophytites.Dawsonites等分子在两个组合中都很丰富,且它们是国内外早泥盆世一中泥盆世早期的代表属种,可见跳马涧组的时代应与半山组一道,归于中泥盆世早期。

The granitoids in central and southern Xizang can be divided from north to south into three belts, i. e., the Gangdisi belt, the Lhagoi-Gangri belt and the Himalayan belt. Though belonging unexceptionally to the calc-alkaline series, the granitoids are characterized by different rock types in different belts with granodiorite occurring mainly in Gangdisi, gneissic two-mica granite in Lhagio-Gangri and muscovite granite and tourmaline granite in Himalayan. In addition, zircons from granitoids have diverse typomorphic...

The granitoids in central and southern Xizang can be divided from north to south into three belts, i. e., the Gangdisi belt, the Lhagoi-Gangri belt and the Himalayan belt. Though belonging unexceptionally to the calc-alkaline series, the granitoids are characterized by different rock types in different belts with granodiorite occurring mainly in Gangdisi, gneissic two-mica granite in Lhagio-Gangri and muscovite granite and tourmaline granite in Himalayan. In addition, zircons from granitoids have diverse typomorphic characteristics in different belts: (1)the content of zircon in granitoids gradually decreases from north to south; (2)the Zr/Hf ratio of zircon decreases as the acidity of the rocks grows higher and the age of the rocks becomes younger; (3) the elongation coefficient of zircon rises with the increasing Si—K+Na contents of the granitoids; (4) (100) and (111) crystal faces of zircon are much developed where Si, K and Na contents of granitoids are relatively low in the G angdisi belt, while(110), (311)and(131) faces of zircon are extensively seen in the Lhagio-Gangri and the Himalayan belt whose granites have higher contents of Si, K and Na; (5) As for REE, the zircon is dominated by HREE, with a HREE/∑ REE proportion of more than 80%.

西藏各类花岗岩分布极为广泛。锆石在不同时代和不同岩性花岗岩中的标型特征也互有差异。锆石矿物含量从北向南有逐渐降低的趋势;锆石中的Zr/Hf比值是随着岩石的酸度增加和岩体时代变新而降低;锆石的伸长系数是随着岩石中Si-K+Na的含量增加而加大;在冈底斯带花岗岩中的Si和K+Na含量低时,锆石多出现(100)和(111)晶面,而拉轨岗日岩带和喜马拉雅岩带浅色花岗岩中的Si、K、Na含量较高时,锆石则多出现(110)、(311)和(131)晶面;锆石中稀土元素是以重稀土元素为主,其含量占总稀土量的80%以上。

 
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