- 更多网络例句与多岩状相关的网络例句 [注:此内容来源于网络,仅供参考]
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Based on the petrological and geochronological study of metamorphic complexes from the Grove Mountains, the following conclusions are reached.(1)Exsolution texture is widely found in clinopyroxene in mafic granulites. A peak metamorphic temperature of 850 C was obtained from the reintegrated compositions of exsolved clinopyroxene. The preservation of augite megacrysts suggests a single episode of high-grade metamorphism for the Grove Mountains.(2)The compositional comparison of garnet from pegmatites with that from country rocks demonstrates that garnet in pegmatites is of xenocryst origin, and late amphibolite facies metamorphism does not occur in this area.(3)The Pan-African charnockite and post-tectonic sheet-like granite were first recognized in East Antarctica. Their occurrences suggest a collisional orogeny during the Pan-African time.(4)The SHRIMP U-Pb zircon dating on various rock types indicates that the major metamorphism in the Grove Mountains occurs at c. 550 Ma, and the tectonothermal evolution terminated at c. 500 Ma. The Grenvillian granulite facies metamorphism did not develop in the studied area.(5)The Prydz belt, the second Pan-African suture within the Gondwana suppercontinent, was further comfirmed based on this study. The Gondwana suppercontinent was not formed by the simply juxtaposition of East and West Gondwana, but by the collision of several blocks during the Pan-African time.
本项目通过格罗夫山地区高级变质杂岩的变质岩石学和同位素年代学研究,获得如下重要认识:(1)发现辉石出溶结构,由此获得峰期变质温度为850 C,并根据火成普通辉石的识别确定该区只存在单相麻粒岩相变质;(2)通过伟晶岩中石榴石斑晶与围岩中石榴石的对比研究提出了石榴石的捕虏晶成因,进而确定该区不存在晚期角闪岩相变质作用;(3)在东南极首次识别出泛非期紫苏花岗岩和后构造层状花岗岩,为泛非构造热事件的碰撞造山成因提供了重要佐证;(4)对不同岩石类型的锆石SHRIMP定年精确地限定了格罗夫山地区主期变质作用发生于泛非期,~550 Ma,热事件结束于~500 Ma,年代学数据没有揭示在该区存在格林威尔期麻粒岩相变质作用的迹象;(5)进一步确认了东南极内部普里兹带的存在,它属于冈瓦纳超大陆内部的第二条泛非期缝合带,据此认为冈瓦纳超大陆并不是由东、西冈瓦纳陆块的简单拼合而成,而是多个不同块体拼合的结果。
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According to model, lead zinc ore bodies of mineral deposit, celestite ore bodies and gypsum ore bodies are distributed by the incomplete dome shape. The sandstone type ore bodies like a curved surface shape, is on the top, wide distribution, which like the top cover of a mushroom. The limestone breccia type ore bodies, under the sandstone type ore bodies, with mostly irregular vein shape, lens body shape, locate at the root of the mushroom. Gypsum and celestite ore bodies, accompanying with limestone breccia type ore bodies with the shape of vein, lens body, distribute under the sandstone type ore bodies.
根据模型显示,金顶矿床铅锌矿体、天青石矿体和石膏矿体呈不完整的穹隆状分布,砂岩型矿体在上,为曲面状,分布广,似一蘑菇的顶盖,而灰岩角砾岩型矿体分布局限,部分产于砂岩型矿体之下,多为不规则的脉状、透镜体状,构成蘑菇的根部;石膏和天青石矿体主要与灰岩角砾型矿体相伴产出,呈脉状、透镜体状,多分布于砂岩型矿体下部。
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This type is accompanied by the structure-salt dissolution breccias,being vein or flamboyancy in cross section while some of them shot through the lead and zinc ore. In fact,the breccias were lead and zinc orebodies themselves.
其角砾成分单一(主要为沥青质灰岩、晶质灰岩)、大小混杂(nmm~nX10m)、无分选,角砾多呈不规则状和次棱角状或次浑圆状,部分角砾具有可拼性,角砾间为砂质充填或无充填,表明它是一套构造和膏溶共同作用形成的角砾岩。
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The results indicate that the tempestite in the area has lots of rock types including clastic rocks, bioclastic limestones and volcaniclastic rocks. The cumulative probability plots have "high slope-multi-bouncing population-1 suspension population" pattern, multi segments pattern and "high slope 1 segment" pattern. The sedimentary structures include gutter cast, surface of scour, cut structure, graded bed, massive bedding, hummocky cross stratification, parallel bedding, ripples, contemporaneous deformation and Fugichnia. The grains distribution and sedimentary structures shier that the transportation medium is characterized by tractive current and gravity flow synchronously.
结果表明,该凹陷风暴沉积岩石类型丰富,包括各类碎屑岩、生物灰岩和火山碎屑岩粒度分布具有"高斜多跳悬式"、多段式和"高斜一段式"等多种样式沉积构造发育渠模、冲刷面、截切等底层面侵蚀构造和递变层理、块状层理、丘状层理、洼状层理、平行层理等构造,还发育有波痕和各种同生变形构造、生物逃逸构造等粒度分布和沉积构造反映出研究区兼有重力流和牵引流的水动力机制。
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In this research project, we have got a series conclusions:(1) there is no excess argon in the high-pressure white micas being in the orthogneiss;(2) The distribution of excess argon in eclogite is positive correlative with the ratio of Mg/, but negative with the ratio of Na/;(3) The in-situ analyses by using the method of laser probe 39Ar-40Ar show that the age radius from central to margin in a single grain of high-pressure white mica in eclogite;(4) There is no any evidence to prove that the excess argon in eclogite comes from fluid;(5) The excess argon in eclogite inherited from primitive rock during high-ultra high pressure metamorphism;(6) There is no excess argon in the eclogite when its surrounding rock is carbonate.
本项目用综合手段,研究了高压白云母中过剩氩的来源、赋存、分布与岩性、产状、矿物元素和矿物显微结构之间的相关关系,以确定过剩氩在高压白云母中赋存的主要控制因素。初步得出了以下结果:1、高压变质的正片麻岩中的白云母中不含过剩氩;2、高压白云母中过剩氩的赋存和Mg/有着正相关关系,而和Na/呈负相关;3、激光微区氩-氩分析表明,榴辉岩中的单颗粒多硅白云母存在年龄梯度;4、初步否定了高压白云母中过剩氩来自于流体的说法;5、初步认定,榴辉岩中多硅白云母中过剩氩主要是在高压-超高压变质过程中由内部继承的;6、在阿尔金及柴北缘等地围岩为碳酸岩的榴辉岩中的高压白云母不含过剩氩。上述研究结果将推动过剩氩成因研究走向深入。
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Any of several small tuft ed ferns of the genus Woodsia,having pinnately divided fronds and growing in cool,rocky areas.
岩蕨属一种岩蕨属的小且丛生的羊齿植物,有裂开的羽状叶,生长在荫凉的、多岩地区
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Any of several small tufted fern s of the genus Woodsia,having pinnately divided fronds and growing in cool,rocky areas.
岩蕨属一种岩蕨属的小且丛生的羊齿植物,有裂开的羽状叶,生长在荫凉的、多岩地区
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The tectonic rocks along the fault zone are composed of cataclastic rocks and mylonites formed in higher, middle and lower temperature. Respectively, both of structural features and rocks have the features of multiple phase's of deformation. The deformation features of main minerals in the high temperature mylonites show that: the quartz has the form of long single crystal and the fabric feature of point maximum near X axis; the feldspar has the form of recrystallization assemblage, They present a high amphibolite-granulite facies with temperature >600℃ and depth >20km. The deformation features of mylonites formed in middle temperature show that: the quartz has the form of polycrystal banding and the fabric feature of point maximum near Y axis and small circle girdle with Y rotational axis; the feldspar has the form of a coremantle structure, They reflect a high greenschist-lower amphibolite facies with temperature from 400℃ to 600℃ and depth from 15km to 20km.
其中,高温糜棱岩主要矿物变形特征组合为:石英为长矩状或长条状单晶、组构为近X轴的点极密,长石为几乎完全重结晶的集合体,形成温度>600℃,相当于高角闪岩—麻粒岩相,形成深度>20km;中温糜棱岩主要矿物变形特征组合为:石英为多晶条带、组构为近Y轴点极密和以Y轴为旋转轴的小圆环带,长石发育核幔结构,形成温度为400~600℃,相当于高绿片岩—低角闪岩相,形成深度为15~20km;低温糜棱岩主要矿物变形特征组合为:石英发育核幔结构、组构特征为近Z轴点极密,长石以碎裂为主,形成温度<400℃,相当于中低绿片岩相,形成深度为8~12km;碎裂岩则主要代表了地表浅层的变形。
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Most of small intrusive bodies are stocks or dikes, and each of the dimension is less than 1km2 ; they are mostly granite-porphyry、porphyritic-granite、monzogranite,a small amouts of them are quartz diorite or diorite; the chemical characters are high content of SiO2、K2O and low content of Mg and CaO, on the SiO2-K2O diagram all the samples fall in the field of high-K calc-alkalic series and shoshonite series.
小岩体多呈岩株或脉状产出,出露面积多数在1km2以下;岩性主要为花岗斑岩、似斑状花岗岩、二长花岗岩,少量为石英闪长岩及闪长岩等;岩石化学成份以高硅、富碱、多钾、贫镁、少钙为特征,属高钾钙碱性系列或钾玄岩系列。
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The bitumen occurs as reticulates, impregnation, intercrystalline pores, dissolved caverns and fissures. The reservoir lithologies are shallow facies crystalline dolomites, dolomitic limestone, and paleokarst dolomite breccia.
沥青产状多以网状、浸染状、晶间孔型、溶洞型、裂缝型赋存;储层岩性为浅滩相的结晶白云岩、白云质灰岩与古岩溶角砾状白云岩。
- 更多网络解释与多岩状相关的网络解释 [注:此内容来源于网络,仅供参考]
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arkose:长石砂岩
长石砂岩(arkose)是一种长石碎屑含量大于25%的砂岩,它包括长石砂岩和岩屑质长石砂岩. 一般为粗禁忌游戏下载*劲舞团官方网站*砂状结构,肉红色至灰色,分选性和磨圆度变化较大. 长石砂岩多由长英质母岩,如花岗岩、片麻岩经机械风化,
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chrysotile:纤蛇纹石
叶蛇纹石为含水矽酸盐矿物 也是蛇纹岩(Serpentinite)的主要组成 形状多呈板状、叶状或块状;若呈纤维状者 称之为纤蛇纹石(Chrysotile) 或称温石棉. 颜色多呈各种颜色 并含有淡色或深色的斑点 少部份呈黄、褐、红褐或灰色 一般呈绿色者 含铁量愈高 颜色愈深.
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conglomerate:砾岩
1、砾岩(conglomerate)和角砾岩:碎屑岩中大于2mm的颗粒>50%的岩石称为砾岩,如果砾石为棱角状或次棱角状则称为角砾岩. 砾岩和角砾岩的砾石主要由岩屑组成,矿物成分则多为石英和燧石,胶结物可为泥质、铁质、钙质、硅质等.
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graywacke:硬砂岩
杂砂岩[1](graywacke)又称瓦克岩(wacke)、硬砂岩(graywacke),是指杂基含量多(>15%)的砂岩. 分选不好、泥砂混杂的砂岩,一般含石英较少,且多呈棱角状. 这种砂岩中的碎屑一般呈棱角状,分选性差,结构成熟度低,属密度流沉积.
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perlite:珍珠岩
珍珠岩(Perlite)系一种具有珍珠结构的酸性火山玻璃质熔岩,为典型的酸性岩浆喷出岩.多呈针状、球状雏晶结构、块状构造.由于其独特的物理化学性质,可用于制作日用陶瓷、建筑卫生陶瓷,部分替代高岭土、长石等原料.笔者分析讨论了珍珠岩在陶瓷坯体中的作用机理,
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lenticular:透镜状
一、引言对于碎屑岩中的压扁(flaser)-透镜状(lenticular)层理,近几十年来研究甚多,目前除部分人认为属于风暴、风或其它成因外,多数学者认为地层中发育广泛,厚度很大的压扁-透镜状层理反映了潮汐旋回沉积环境.
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Muricidae:骨螺科
腹足纲(Gastropoda)前鳃亚纲(Prosobranchia)骨螺科(Muricidae)海产螺类. 壳长而厚,壳面具各种结节或棘状突起. 世界性分布,多产於热带,许多种类生活在多岩石的浅水中. 称为岩螺或岩蛾螺. 在其他贝类的壳上钻一孔,伸入长吻取食.
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siltstone:粉砂岩
砂岩 层状砂岩 石英砂岩镜下 3、粉砂岩(siltstone):粉砂含量>50%,与砂岩好像,但碎屑粒度更细. 成分以石英为主,其次为白云母和长石,少量岩屑,胶结物以钙铁质为主,颜色多为灰白、浅灰、黄褐、红褐等色. 颗粒渺小,易与泥岩相混,