查询词典 mafic

The series movement senses of the mafic rocks boudinages and porphyroclasts are from a hand specimen, outcrops to more large size.

一系列运动学标志以手标本或露头尺度，乃至更大规模的镁铁质岩石石香肠或碎斑系为特征。

Based on the analysis of the ultra-long electromagnetic wave curves from Tanggu to Dalian,the geological body to effect the high gravity and magnetic anomalies could be a mafic intrusion.

根据塘沽—大连探测的超长电磁波频谱曲线剖面对比分析，证实引起渤海中部重磁异常高的地质体可能是基性超基性岩体。

Their geochemical characteri stics of trace elements and Nd and Sr isotopes show that these mafic rock s erupt ed in a back-arc basin.

达拉布特蛇绿岩带的镁铁质岩属亚碱性和碱性系列，可能是弧后盆地火山活动的产物。

Mafic, ultramafic and/or alkaline volcanic rocks and their entrained mantle peridotitic xenoliths and xenocrysts are known as samples directly from the lithospheric mantle.

基性、超基性火山岩捕获的地幔橄榄岩捕虏体和捕虏晶是直接源自岩石圈地幔的样品。

According the Sr - Nd isotopic and trace element characteristics and field observation, the mafic dikes are not affected by crustal material during emplacement.

根据Sr、Nd同位素、微量元素研究及野外地质观察，本区基性岩脉的岩浆在上升侵位过程中未发生地壳物质混染。

According to K-Ar dates and geochemistry of mafic dikes and previous works, the K-Ar data can be divided into five periods (146Ma, 132—138 Ma, 105—112Ma, 82—99Ma, 54-75Ma).

可将工作区基性岩脉的形成时代分为5期，分别是：第一期146Ma，第二期132～138Ma，第三期105～112Ma，第四期82～99Ma，第五期54～75Ma。

In the rheological experiments for natural mafic rock samples there will be semibrittle deformation under lower temperature ranges, in contrast, there will appear melts at grain boundaries in the sample under higher temperatures, and this could greatly effect the rheological behaviors of samples.

在采用天然基性岩样品进行的流变实验中，存在因实验温度低而样品处于半脆性变形域与因实验温度高而样品颗粒边界出现熔体的矛盾。

During the subduction and collision of Yangtze and Sino-Korean craton in Triassic period, they all subduced into mantle depth, due to the granite was relative poor in water and denser than sedimentary rocks, the kinetics rate of metamorphism of granite was much more slow than that of sedimentary and mafic volcanic rocks.

即在扬子板块与中朝板块三叠纪俯冲—碰撞过程中他们一起进入到地幔深度的超高压环境，但由于花岗片麻岩的原岩相对于副片麻岩的原岩明显贫水且结构致密，其中发生变质作用的动力学速度明显慢于沉积岩或基性火山岩中的动力学速度。

Geologic evidence ; Mesozoic mantle enrichment ; Early Jurassic mafic ultramafic intrusion ; Meizhou of Guangdong Province

地质学证据；中生代地幔富集作用；早侏罗世基性超基性岩体；广东梅州

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 concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。