| 1. | Carboniferous tianshan igneous megaprovince and mantle plume 天山石炭纪大火成岩省与地幔柱 |
| 2. | Based on the summarize study of mantle plume and thermal structure , the paper divided the thermal structure into several pieces 在地幔柱和热力构造研究进展总结的基础上,对盆地热力构造进行了分类。 |
| 3. | Recently , however , two distinct tectonic models have been postulated to account for the event of the ncc . one suggested that the ca 近年针对华北陆块1800ma的大地构造演化及其动力学背景提出了不同看法,其中以地幔柱模型和大陆碰撞模型最具代表性。 |
| 4. | Hotspot is a window to understand mantle plume hypothesis and dynamics of mantle plume , and the area where ridge interactions with hotspot is the best place to directly find out relationship between plate tectonics and mantle plume 摘要地表热点是认识地幔柱假说以及地幔柱动力学的窗口,发生在洋脊与热点之间的相互作用则是了解地球上两大动力系统(板块构造和地幔柱)的直接联系的最有利地区。 |
| 5. | All of the abovementioned facts suggest that the neoproterozoic diabases from the xuzhou area of the north china block were derived from nd isotopically - depleted mantle sources with variable enrichment in fertile components and produced through variable degrees of melting at different p - t conditions 结合新元古代全球rodinia超大陆裂解事件及其岩浆活动与地幔柱的密切关系,徐州地区晚元古代辉绿岩墙群为地幔柱作用在华北陆块边缘的记录。 |
| 6. | It also implied that mother magma formed mafite was a residual melt trace elements distributed pattern is similar to transitional mid - ocean ridge basalt simultaneously , the pattern , which displayed a clear ( k ) . rb . ba , th , ( th ) - enriched , also can be explained as an ocean ridge environment overlappe d with mantle plume 其微量元素的分配形式类似于过渡类型的洋中脊玄武岩,同时表现出( k ) 、 rb 、 ba 、 th 、 ( ta )的明显富集,也可解释为在洋中脊环境上叠加了地幔柱的特征。 |
| 7. | The transitional group of diabases have intervenient sig , feg , tig , indicative of in - between melting degrees and melting depths . the highest nag in thes e rocks tend to suggest that na behaved as a moderately incompatible element during magma generation , thus preclude the possibility for residual jadeite to host na 所有的观察事实反映徐州地区晚元古代辉绿岩来源于具有不同深度、不同富集程度的nd同位素亏损地幔,因此最好的解释模式就是它们为地幔柱冲击作用下岩石圈-软流圈-地幔柱相互作用的产物。 |
| 8. | The research of large igneous rock province - ermei basalt extrusion - mantle plume shows that songpan - ganzi folded belt is a hopeful target for breakthrough of petroleum exploration , and the key issue is how to make well a coupling and optimization among its faults , structures , traps and reservoirs 根据地震测深、重、磁、电等的探查,发现该褶皱带深部有一低速高导层,而对大火成岩省峨眉玄武岩喷溢地幔柱的认识深化均表明,四川松潘甘孜褶皱带是可望获得油气勘探突破的靶区,重要的是断裂构造、圈闭、储集层的耦合与优化。 |
| 9. | High - mg volcanic rocks approach the primitive mantle compositions , and their magmatic source is close to the composition of bse , derives from the lower mantle and formed by this type - mantle rocks " fractional melting highly ( > 25 % ) . high - mg volcanic magma , formed in the axis of the emei mantle plume , underwent the crystallization differentiation of olivines and some pyroxenes ; some olivines reflect fair cumulus crystallization 高镁火山岩接近于原始岩浆的组成,岩浆源区与地球平均成分bse的成分特征相近,起源深度为下地幔,为该地幔岩较高程度的部分熔融( 25 )而形成的。高镁火山岩处于地幔柱的轴部,经历了橄榄石及一定程度的辉石分异结晶,并且橄榄石显示出一定的堆晶作用。 |
| 10. | It is further pointed out that simulation experiments combined with geology , petrology , geochemistry and geophysics ( especially for high resolution seismic technique ) in studying mantle ( hotspot ) - ridge interaction will play an important role in such reseaches as plume - ridge interactions 在肯定地幔柱假说的基础上,对洋脊地幔柱(热点)的模拟实验以及三大洋中不同扩张脊与热点相互作用的最新研究作了系统的介绍和评述,指出室内模拟实验以及地质学、岩石学、地球化学和地球物理学(特别是高分辨率的地震技术)的结合研究将是本领域研究的发展趋势。 |