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The age of adakitic dacite is about 514.2±8.5 Ma, and the age of eclogite from the northern margin of Qaidam basin is 494.6±6.5 Ma. Therefore, it is considered that the slab started its subduction in Late Cambrian, that the adakitic magma was formed at the subduction depth of about 75~85 km, and that the partial melting residues with garnet facies continued subducting and finally formed eclogite in Early Ordovician.

据其地球化学研究结果并结合该区埃达克质英安岩(5 14.2± 8.5Ma)和榴辉岩(494.6± 6 。5Ma)的年龄数据,推测柴北缘板片在晚寒武世开始俯冲,俯冲板片在 75~ 85km深处开始部分熔融形成埃达克质岩浆,而熔融残留部分继续俯冲,在早奥陶世形成含石榴石残留相的榴辉岩。

Optical microscope, scanning electron microscope and X-ray diffraction analysis have revealed that dawsonite mainly occur in the feldspar-rich sandstone and pyroclastic rocks, either as cements filling inter-grain pores as radical, bunchy, rosette, intricately trichoid, and platy collectives, or as replacement of feldspar and lithic grains with bunchy and paty shapes.

片钠铝石主要发育在油气储层或CO2气储层中富含长石的砂岩和火山碎屑岩中。在含片钠铝石砂岩和火山碎屑岩中,片钠铝石以放射状、束状、杂乱毛发状、球状和板状等集合体充填孔隙,或呈束状和板状交代长石和岩屑。片钠铝石及其共生的铁白云石都是最晚形成的自生矿物组合。

Manite superslice is relative simple, dominated by the flysch wedge, ophiolite, carbonate slice of Ma'erzheng Fm. of Buqingshan Gr., lacking deep metamorphosed slice.

马尼特超岩片的物质组成相对较简单,主要由布青山群马尔争组的复理石楔岩片、蛇绿岩岩片、碳酸盐岩片等构成,未见深变质岩岩片。

The Buqingshan — Huashxia superslice is complex, including Middle Proterozoic diorite-facies Kuhai melange slice, ophiolite slice of different times, Early Permian — Early Triassic flysch wedge, basic-acid volcanic slice and carbonate slice and Late Triassic — Early Jurassic Yangqu Fm. terrestrial clastic slice.

布青山一花石峡超岩片组成较复杂,包括中元古界角闪岩相变质的苦海杂岩岩片、不同时代蛇绿岩岩片、早二叠世—早三叠世复理石楔岩片、中酸性火山岩岩片和碳酸盐岩片以及早侏罗世羊曲组的陆相碎屑岩岩片。

Supracrustal sequences free of early strong deformation The early deformation of Jingangku formation complex of Hengshan Wutai group complex has formed a bedding parallel S〓 gneissic and schistosity, occasionally bedding parallel recumbent folds in layers. The early deformation of the near-horizontal ductile shearing isn't very strong in Wutai group complex. The orientation of shear movement is NNW—SSE.

经受早期强烈变形的表壳岩系岩系恒山五台岩群金岗库岩组和五台山五台岩群最早期的变形是平行地层层理的S1片麻理和片理,偶见层内的顺层掩卧褶皱,这些早期近水平韧性剪切变形在五台岩群大都不甚强烈,对地层层序的扰动也很弱,剪切运动方向是北西西——南南东向的。

The ultrabasic rocks form a complex of large tectonic slice s with intercalated slice s of Sebakwian sedimentary rocks.

超基性岩与塞巴奎沉积岩岩片相间构成一巨大的构造岩片的杂岩体。

The A'nimaqing Melange consists of Buqingshan — Huashxia superslice, Manite superslice and allochthonous nappe superslice.

东昆仑阿尼玛卿蛇绿构造混杂岩带包含了准原地系统的布青山—花石峡超岩片、马尼特超岩片和外来系统的推覆体超岩片。

Focusing on the PGE enrichment mechanism in the basic-ultrabasic intrusions in the Panxi rift, firstly, through the interpretation of TM photograph, data processing of regional geochemical exploration and geophysical prospecting results of gravity, magnetic force and seism, we analyzed the controlling effect of structure and magmatic movement on the PGE mineralization; Secondly, through the study of volcanic apparatus, petrography, measurement of comprehensive geochemical section, isotope tracing and dating of typical PGE-rich melanocratic rock series, we discussed the sources of the PGE-bearing mafic-ultramafic intrusions and basalts, their timing, evolvement sequences, the geochemical processes of magma crystallization and fractionation, and the relationship between magma evolution and structural development; Finally, through the analysis of PGE and chalcophile elements concentrations in the melanocratic rock series and the contrastive study with the Noril''sk magmatic Ni-Cu-PGE sulfide deposit, its related continental flood basalts and Siberia Traps, we discussed PGE mineralization characteristics and its enrichment mechanisms in the melanocratic rock series in the Panxi rift.

本项目首先围绕川西地区主要的PGE矿床及伴生矿的地质环境和有关的地质构造背景,通过TM卫片解译、区域化探和重、磁及地震物探资料分析,总体把握构造及岩浆活动对PGE成矿的控制作用;然后通过对典型富PGE暗色岩套的火山机构地质构造、岩石岩相学、地球化学、同位素定年和示踪等方面的工作,分析本区基性-超基性含矿岩体与喷出岩之间的成岩物质来源、侵入时代及演化序列,研究该区同一岩浆房分异结晶的地球化学过程及其随构造发展的耦合关系;最后通过对暗色岩套PGE地球化学剖面分析以及与俄罗斯诺里尔斯克陆内裂谷溢流型玄武岩中PGE矿化的岩石-构造环境对比研究,探讨该区暗色岩套中的矿化特点和富集部位及其PGE富集机制。

The conception, studied objects and basic constituents of non-Smith strata are elaborated from theory level: Non-Smithian strata are the strata that have undergone mixing of different degrees, thus were deformed, metamorphosed and displaced into disorder totally or partially. They are the disorder parts in orogenic belts. Melange is the solo studied object of non- Smithian stratigraphy. The slices in melange is one of the basic constituents of non- Smithian strata, and also one of the basic units in the non-Smithian mapping. The slices used in this paper refer to blocks divided by small-scale tectonic boundaries and have certain constitutes. Superslices used in this paper refer to a set of slice association with similar tectonic deformation bounded by large-scale tectonic mixing.

从理论上阐述了非史密斯地层的概念、研究对象和基本构件:非史密斯地层(non-Smithian strata)是指那些经历过不同程度的混杂建造,并经历了变位,变形、变质,全部无序或部分无序的地层,主要指造山带地层中的无序部分;混杂岩是非史密斯地层的唯一研究对象;混杂岩中的构造岩片是非史密斯地层基本构件之一,亦是非史密斯地层和地质填图基本单位之一,岩片是指以构造拼合边界所分割的具有一定物质构成的地质体;物质建造形成于同一大的构造旋回期(如晋宁期、加里东期、海西期等)、亲源关系密切、大致经历了相似变形、变质历程的一套岩片组合体被称之为超岩片。

Therefore,the northern Sulu UHPM zone can be divided into four petrological tectonic units from southeast to northwest:Haiyangsuo metamorphic complex (eclogitized crystalline basement of the Yangtze craton),Rongcheng UHPM complex,Weihai metamorphic complex (granulites retrograded from UHPM eclogites) and Kunyushan boundary metamorphic magmatic complex.

由此笔者将苏鲁变质带北部由南向北划分为海阳所变质地块(榴辉岩化扬子陆块基底变质单元)、荣成变质地块、威海变质地块(麻粒岩相叠加变质的超高压构造岩片)、昆嵛山边界杂岩带。

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