1) trifurcate rift valley system
三叉裂谷系
1.
It is believed that Helan Mountain, Qinling and northern Qilian area were at the stage of rifting development from Mid-Neoproterozoic to Early-Mid Cambrian, and that Qinling, northern Qilian, Helan Mountain formed a trifurcate rift valley system.
自19世纪70年代板块构造理论引入中国后,一些学者把拗拉槽(Aulacogen)一词赋予了鄂尔多斯盆地西缘贺兰山地区,并认为贺兰山、秦岭、北祁连中新元古代至早中寒武世为裂谷发育阶段,秦岭、北祁连、贺兰山构成了三叉裂谷系。
2) the composite "triple forks" rift system
复合"三叉"裂谷系
3) Triden-fissurealley system
三叉裂陷(谷)系
4) the trigeminal rift
三叉裂谷
5) rifting system
裂谷系
1.
They mainly formed in the different stratigraphic sequences of Meso- to Neo-Proterozoic rifting system.
这类矿床主要形成于中新元古代的裂谷系和裂谷系边缘的不同地质构造单元,其分布受构造控制,集中分布于华北陆块北缘东、中、西段元古宙裂谷系和扬子陆块西侧康滇地轴震旦系裂谷带东侧的边缘活动带,并以华北陆块北缘为主;成矿作用总体受火山-沉积-变质作用控制,具层控性;成矿时代有从北向南变新的趋势。
2.
Previous workers tried to use truncated icosahedra to explain the distribution of rifting system, anorogenic magmatism and dyke swarms of Laurentia and Gondwana in a global view.
前人从全球规模的角度出发,用截顶正二十面体模型解释了劳仑大陆以及冈瓦纳超大陆裂解时期全球范围内的伸展构造组合的展布,包括裂谷系、非造山岩浆活动和岩墙群。
6) rift system
裂谷系
1.
Most of the large gold and polymetal deposits distributed in the north margin of the Yangtze platform located in the nuclei of old rift system.
扬子地台北缘大多数金矿床集中在裂谷系古陆隆起内外接触处，经历了复杂的地壳构造演化，形成新的金矿类型和矿化组合，具多源性，以深源为主，浅源次之，再次是陆源，控矿构造包含同生构造与封闭聚矿盆地等多种成矿作用的叠加。
2.
The history of faulting of the Baikal rift system is esentially coincident with the associated sedimentary processes.
贝加尔裂谷系的断裂发育阶段和沉积作用过程基本一致，除沉积作用前的前裂谷断裂已经活化外，整个裂谷系的发育及演化过程大体可划分为两个阶段，即始新世中晚期—上新世早期（Ｅ２－３２—Ｎ１２）的开始阶段和上新世中晚期—第四纪（Ｎ２－３２—Ｑ）的主要阶段。
补充资料：叉手叉脚
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