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In the Tertiary, mountain frontal molasses deposited between the Yarlung Zangbo ophiolitic melanges and the Gangdese granitic batholiths, and the suture zone together with adjacent tectonic units were modified by thrusting and extension to the present tectonic configuration.
在雅鲁藏布蛇绿混杂带和冈底斯岩浆弧的前缘之间形成了山前磨拉石建造,缝合带及相邻构造单元被后期冲断层和伸展作用改造成现在的构造面貌。
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This orogenetic process is a series of completed tectonic evolution, reflecting the initial orogenic magma underplating and magma mixing, the peak orogenic strong interaction between the crust and mantle, the late orogenic lithosphere started to delaminate and the post—orogenic extensional tectonic setting.
该造山过程为一套完整的演化序列,反映了初始造山的岩浆底侵作用,峰期造山强烈的壳幔相互作用,后期造山岩石圈开始拆沉作用及后造山的伸展构造背景。
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It is considered that the quartz vein has something to do with concealed igneous rock., and its forming is because of pneumatolytic hydrothermal upwelling from magma differentiation in the deep.
综合分析认为,该区石英脉与推测隐伏火成岩体紧密相关,深部岩浆分异后期的气成热液上涌是石英脉形成的主导因素。
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O?C?Cu isotopes. revealing that the mixed hydrothermal fluid of magmatic water and meteoric water reactivated the ore elements in the carbonate rocks and quartz diorite. Copper was transported, as Clcomplexes in the ore fluid and precipitated to enrich and thicken the primary sedimentary protore.
认为该矿床是在岩浆水和后期少量大气水的加入而形成的混合热液共同作用下,活化碳酸盐岩地层和石英闪长岩中的铜等成矿元素,形成含矿热液,并以铜的氯络合物方式运移,在弱还原性条件下使原始沉积矿胚层加厚变富。
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The Isocon analyses also shows that the altered quartz sandstone of the Salitashi deposit which enriches in Cd, As, Ba, Sb, Ag, Co, Ni and Fe, gained Pb, Zn, Cd, Ag, Co, but lost Mn, Zr, Ba, V and Cr during it alteration, the ore and its dolomitized limestones intensively enrich in Ag, Cd, As, V, Cr, Co, Ni and Cu also.
矿石中强烈富集Ag、Cd、As和过渡族元素V、Cr、Co、Ni、Cu,且Cr、Co、Ni在矿石中的富集程度远远高于矿区碎屑岩,近矿白云质灰岩具有和矿石相近的元素富集特征,该矿床的早期矿化和后期的改造成矿作用都与深部岩浆去气有关。
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The mendous thick ore body was formed by sea floor volcanic eruptive sedimentation during the Devonian Period; the stringer ore body by Yanshanian magmatic hydrothermal fluid filling and overprinting. The reduction of old terrigenous detritus and some organic materials has important effect on the late ore fluids.
其中层状矿体为泥盆纪海底火山喷发沉积作用所致,脉状矿体可能来自燕山期岩浆热液充填迭加形成,古大陆碎屑物质和部分有机质的还原对后期成矿流体具有较大的影响作用。
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The orogenic strata have following characteristics: During the subduction and intracontinental orogeny, the strata experienced dramatic tectonic migration and mixing, resulting in various tectonic features. A short sequence usually composed of tectonic slices of various origins, times, deformations and metamorphisms, and scales. The original sequence was badly destroyed. The extant fragments of orogenic belt usually took form as melanges, especially the accretion complex wedge generated in subduction zone, which is contrary to the Law of Superposition. The original location of the accretion is also contradicted with the Law of Original Horizonality, because the accretion is oblique with high degree. Marine rocks, volcanic rocks of continental margin and metamorphic rocks were well-developed in the orogenic belt, especially ultra-basic, basic rocks were wide spread and were intensely metamorphosed, accompanied by metamorphic slices returned from hundred kilometers underground with ultra-high pressure and magma movements during syn-orogeny and post-orogeny, thus formed the colorful landscapes.
造山带非史密斯地层构成具如下独特性和复杂性:造山带在俯冲碰撞和陆内造山阶段,发生过强烈的构造搬运和构造混杂,构造形迹多样化,垂直不长的地层体往往是众多不同来源、不同时代,不同变形变质程度,不同大小的各种构造岩片拼贴体,地层原始层序被严重肢解、破坏;尤以产于俯冲带的俯冲增生杂岩楔的原始形成方式与史密斯地层学的&层序叠覆律&老下新上的顺序正好相反,其混杂岩增生方式是老的&片体&在上,新的&片体&阶段性拼贴在老的&增生片体&的斜下方,这种增生片体的原始位置亦与&原始水平律&相悖,即增生片体一般保持较高角度倾斜;在岩石类型和变质程度上,造山带海相和古陆缘火山岩以及变质岩普遍发育,尤其是超基性、基性岩系分布广泛,变质作用较强,伴有从百余公里以下深部超高压变质岩片的折返和同造山期与造山后期岩浆活动,构成极为复杂的地质景观。
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Also being with the metamorphic crystalline basement formed later and suffered the stronger tectonic event and the material composition reforming, being composed of the material with low density and existing the relatively weak intrinsic mechanical system, Huaxia massif was affected by the various tectonic movement in the later period, the layers inside the lithosphere interacted under action of the tectonic force, this led to the material composition and the structure regulated and changed constantly by the magmatism in the crust, underplating and faulting and folding, therefore, the ability to resist the deformation decreased with the every variation.
华夏地块变质结晶基底形成时代晚,并遭受更多更强构造变动与物质组分的改造使之物质组成密度较小,岩石圈先期固有的力学结构系统相对较弱,尤其是后期的地球大系统的历次构造运动都对其施加影响,构造动力作用下引起内部圈层间相互发生作用,导致内部物质成分、结构形态通过壳内岩浆活动、地幔底侵作用、断裂褶皱等不断的调整重组重建而变化,其每一次调整变化,都使其总体抵抗变形能力进一步降低。
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phenocryst:斑晶
)一种具斑状岩理的火山岩,此斑状岩理依岩浆冷却速度不同,分为斑晶(Phenocryst)和石基(Groundmass). 岩浆在早期慢慢冷却结晶所成的大晶体,称为斑晶;到了后期,岩浆快速冷却结晶形成由细小晶体所构成之石基,此种组织即为斑状岩理,