地质矿产类部分翻译案例
1、区域变质作用主要发生于石炭系上统(C2?)、二叠系上统长兴组一段(P32-1)、二叠系上统长兴组二段(P32-2)地层中,表现为一套低绿片岩相变质现象;热液蚀变~交代变质作用主要发生于印支期中~酸性岩体外接触带及俘虏体中不同程度的一系列角岩、角岩化蚀变现象;动力变质作用主要发生于脆~韧性剪切带及其他构造裂隙带中的各类碎裂岩化、角砾岩化、绢云母化、隐晶帘石化(绿帘石化)、白云石化、方解石化、粘土化(泥化)、透闪石化、绿泥石化、钾(长石)化、硅化、黄铁矿化等蚀变现象。
1. Regional metamorphism took place in Upper Carboniferous(C3), the first section of Changxing formation of upper Permian(P32-1)and the second section of Changxing formation of upper Permian(P32-2). Thermal alteration metasomatism can be found around the contact between igneous stocks and surrounding rocks, hornfels and skarn being produced. Dynamic metamorphism caused appearance of structural breccias, cataclasite and mylonite etc in fractured zones, forming calcitization, dolomitization, tremolitization and chloritization .
与上覆二叠系长兴组一段(P32-1)玄武岩呈角度不整合关系。
It has the relationship of angular unconformity with the first section of Changxing formation of upper Permian((P32-1).
2、二叠上统长兴组一段(P32-1)
2. First section of Changxing Formation of Upper Permian((P32-1)
分布于勘查区西部及北西部地势较高的山脊及山坡处,地层总体呈北北东~南南西向展布,为一套基性火山岩组成。岩石组合为绿黑、黑色致密块状玄武岩、杏仁状玄武岩、玄武质凝灰岩、玄武质角砾岩,局部夹有玄武质集块岩,部分地段见有发育程度不高的柱状节理。顶部与二叠系上统长兴组二段(P32-2)石灰岩层呈平行整合接触关系,接触产状倾向82°~85°,倾角10°~30°,厚度>114米。The strata of first section of Changxing formation strike northeast by north, dipping 82°-85°with angles of 10°-30°, total widths being over 114m. Lithology is massive green and black basalt, basaltic tuff, basaltic breccia and occasional basaltic agglomerate in which weakly developed column joints could be seen. At top the member contacts limestone of P32-2 in parallel conformity.
岩层总体产状平缓,并与上覆石灰岩层一致。与下伏石炭系地层呈角度不整合关系,缺失二叠系上统龙潭组(P31)及中、下二叠系地层。
The overall occurrence is flat and consistent with the overlying limestone. It has the relationship of angular unconformity with the underlying carboniferous strata. There are no Longtan formation of upper Permian(P31) and Middle Permian and lower Permian.
从大地构造的演化的角度分类,某国的岩浆活动可划分为三个阶段,即:古元古代~早石炭世、晚石炭世~中三叠世、晚石炭世~第四纪。现将与勘查区有关的晚石炭世~中三叠世岩浆活动阶段特征简述如下:
Tectoniclly, magmatism taken place in XX country can be classified into three stages, i.e. early Proterozoic-early Carboniferous stage, late Carboniferous-middle Triassic stage and Late Carboniferous-Quaternary. Magmatism in the gold deposit distict was limited to late Carboniferous-middle Triassic.
岩浆岩带总体呈北东向延伸,向南延至泰国的程逸一带,向北可能与中国的哀牢山带(属该构造带的西支)相连。该带内岩浆活动强烈,中酸性岩、基性岩均有出露,侵入岩与火山岩同等发育。本带的酸性侵入岩以花岗闪长岩、云英闪长岩为主,伴有二长岩、闪长岩、石英二长岩。侵入体呈岩枝、岩株状产出,直径l~lO千米不等。据拉瑟雷(1972)在沙拉坎采用钾~氩法在花岗闪长岩中获得的同位素测定年龄值为(255±10)Ma,时代属中二叠世~晚二叠世。结合本带大地构造演化特征分析,酸性侵入岩可能形成于早三叠世~中三叠世,属岛弧环境的产物。
Magmatism zone stretches in northeast, extending to Loei of Thailand in south and connecting with AiXX countryhan mountain (west branch of the tectonic belt) of China. In the magmatic zone, the mafic, intermediate and acidic igneous rocks and volcanics were well developed. The igneous rocks include granodiorite, mica-quartz diorite and monzonite etc. occurring in stocks sized 1-10km2. According to the isotopic dating obtained by Raselli (1972) in granodiorite using potassium-argon method in Sarakam, the age was (255±10)Ma, Middle Permian - Late Permian Epoch. Based on the analysis of geotectonics evolutionary characteristics, the acid intrusive rocks may form in Early Triassic - Middle Triassic Epoch and was the product of island arc setting.
主要为区域变质作用、热液蚀变~交代变质作用、动力变质作用等。区域变质作用主要表现为一套绿片岩相的板岩、粉砂质板岩、变质粉砂岩等。热液蚀变~交代变质作用为围绕各类岩体外接触带产生的角岩、矽卡岩等。动力变质作用主要发生在断裂带中的各类构造角砾岩、碎裂岩、糜棱岩等。
Metamorphism regionally occurs in form of regional metamorphism, alteration metasomatism and dynamic metamorphism. Slate, siltic slate and slightly metamorphic siltstone are the products of regional metamorphism. Alteration metasomatism can be found around the contact between igneous rockbodies and surrounding rocks, hornfels and skarn being produced. Dynamic metamorphism caused appearance of structural breccias, cataclasite and mylonite etc in fractured zones.
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