1) mafic dyke swarms
基性岩墙群
1.
This paper reported the systematic research on the element geochemistry and Pb-Sr-Nd isotopes of the mafic dyke swarms in south Tibet.
藏南江孜—哲古一带广泛分布有北西向和近东西向产出的基性—中基性岩墙群,它们是新特提斯洋晚期发生大规模扩张的产物。
2.
Mafic dyke swarms emplaced in different levels of the crust depending on the continental solidification and the orientation of ancient stress.
基性岩墙是伸展背景下，来自地幔的基性岩浆侵入体；基性岩墙群则是由一定数量的具有相同或相似产状、呈线状分布的基性岩墙组成。
3.
Appears massive NW-SE distributed Mafic Dyke Swarms in Zhenba eastern area,in north Dabashan structure belt ,the south of Qinling, meanwhile appears has the few Syenite Porphyry Veins to assume the approximate direction mop.
在南秦岭北大巴山构造带中的镇巴东部地区早古生代地层中出露大量NW-SE向展布的基性岩墙群,同时还出露有少量正长斑岩脉呈近似方向展布。
2) mafic dyke swarm
基性岩墙群
1.
Usually mafic dyke swarms occur in most Precambrian shields.
基性岩墙群广泛出现在全世界前寒武纪地盾中 ,它的发育往往与区域性伸展构造环境有关 ,并可能与地幔柱有密切联系。
2.
In fact, the NCC was dominated in the late Palaeoproterozoic by an extensional_tectonic regime, associated with the development of an aulacogen system, anorogenic magmatism (rapakivi granites, anorthosites, gabbros, granites and pegmatites), with the emplacement of large_scale mafic dyke swarms and with the uplift of the early metamorphic basement or the tectonothermal event.
事实上 ,在古元古代末期华北克拉通以伸展 -裂解构造为主 ,表现为拗拉谷系发育、非造山岩浆活动 (环斑花岗岩、斜长岩、辉长岩、花岗岩类及伟晶岩脉等 )、大规模基性岩墙群侵位以及早期变质基底隆升或退变质构造热事件等 。
3) basic dike swarm
基性岩墙群
1.
Geological characteristic and tectonic environment of basic dike swarms in the Beishan area, southern Hami, Xinjiang, China.;
新疆哈密南部北山地区基性岩墙群的地质特征及形成构造环境
2.
According to research on their characteristics of geology and petrology,basic dike swarms,widely intruded in Maxianshan rock group,are divided into two phases.
结合相关研究成果,认为马衔山岩群中的两期基性岩墙群形成于祁连地区由俯冲造山向碰撞造山的转换时期,代表了中祁连地块在区域上遭受北东-南西向强烈挤压的过程中派生北西-南东向扩张作用的地质纪录。
3.
The basic dike swarms crystalline dated(431.
北大巴地区广泛分布了呈北西-南东向产出的基性岩墙群,主要侵位于下古生界。
4) mafic dike swarm
基性岩墙群
1.
U-Pb and Sm-Nd dating of mafic dike swarms in southern Qiangtang, Qinghai-Tibet Pleatau and its tectonic significance;
青藏高原南羌塘基性岩墙群U-Pb和Sm-Nd同位素定年及构造意义
5) basic dyke swarms
基性岩墙群
1.
A rare kind of primary round columnar joints is developed in the basic dyke swarms in the western Shandong,which is made of the radial joints and the round columnar joints with same axis vertical to the strike of the dyke, arranged one by one along the strike of the dyke.
在鲁西地区前寒武纪基性岩墙群内发育一种罕见的原生圆柱状节理 ,由同轴圆柱状节理和放射状节理组成 ,垂直于岩墙走向 ,沿岩墙走向排列 ,是一种指示岩浆水平侵位的流动构造。
6) Basic-intermediate dike swarms
中-基性岩墙群
补充资料：超基性岩
| 超基性岩 ultrabasic rock 火成岩的一类。二氧化硅含量低（小于45％），铁、镁质含量高，以不含石英为特征。深灰黑色，比重较大。主要由橄榄石、辉石，以及它们的蚀变产物，如蛇纹石、滑石、 绿泥石等组成。代表性岩石有纯橄榄岩、橄榄岩、辉石岩和金伯利岩、苦橄岩等。自然界以镁质超基性岩居多。它们常与碱性岩、基性岩共生，形成杂岩体。超基性岩常沿深大断裂带分布，受其控制，形成岩带。岩体的规模大小不一，常呈透镜状、脉状或不规则状。与超基性岩有关的矿产有铬、镍、钴、铂族金属、金刚石、石棉等。 |
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参考词条