2) mantle plume
地幔热柱
1.
The ore-forming materials are mainly derived from the earth core constrained by deep processes and moved up to surface with multi-stages of mantle plume evolution and is contaminated with earth crust materials.
认为峪耳崖矿区成矿物质应主要来自地核,受深部过程的约束,成矿物质随地幔热柱多级演化向地表迁移,在其上升过程中,与壳源物质发生部分混染,使所测同位素数据往往表现出以深源为主、并混有少量壳源物质的特征。
2.
Mantle branch is the third-grade tectonic unit during multiple evolution of mantle plume.
幔枝构造是地幔热柱多级演化的三级单元,其对内生矿产的成矿控矿作用十分明显。
3.
Mantle branch structure is the third-order unit of mantle plume multistage evolution.
幔枝构造是地幔热柱多级演化的第三级构造单元 ,其核部变质—岩浆杂岩隆起与外围盖层之间的主拆离带体系是很好的成矿控矿构造。
3) mantle plume
地幔柱
1.
Progress in the research on noble gas isotope tracing of the mantle plume and its significance.;
地幔柱稀有气体同位素示踪研究的进展及其意义
2.
Petrogenesis of the basalts of Woniusi Formation at Baoshan area, Yunnan: Is it of mantle plume origin?;
云南保山卧牛寺组玄武岩成因:地幔柱活动的产物?
4) super mantle plume
超地幔柱
5) mantle plumes
地幔柱
1.
The debate over mantle plumes and how to test the plume hypothesis;
地幔柱大辩论及如何验证地幔柱假说
2.
By way of the melted products of either the margin along the mantle plumes or the partial zones in the subduction period, it emerges at the copper deposits or occurrences in the basalt of Guizhou, and in many aspects there occur similarities with the same sort of the copper deposits in the North American Continent, therefor.
它是地幔柱边部或消亡期局部熔融产物。
3.
Geochemical studies of komatiites and picrites of different ages suggest that the source of mantle plumes during the Archaean was dominated by depleted MORB-type mantle, and this type of mantle was gradually replaced by enriched OIB.
地幔柱是源于核幔边界或上下地幔边界的热异常物质 ,其隐含的巨大能量导致地幔的大规模熔融和大火成岩省的形成。
6) Plume
[英][plu:m] [美][plum]
热地幔柱
补充资料:地幔柱
地幔柱 mantle plume 深部地幔热对流运动中的一股上升的圆柱状固态物质的热塑性流,即从软流圈或下地幔涌起并穿透岩石圈而成的热地幔物质柱状体。它在地表或洋底出露时就表现为热点。热点上的地热流值大大高于周围广大地区,甚至会形成孤立的火山。 地幔柱概念是由J.摩根于1972年提出的,其所根据的事实是:洋底有一系列海山,即呈链状分布的死火山脉,它一端连接着现代活火山,沿此链距离活火山越远,其年龄越老。这被认为是当岩石圈板块运动时,固定不动的地幔柱在板块表面留下的热点迁移的轨迹,也可以说是由一系列死火山组成的无震海岭。如夏威夷活火山热点,因太平洋板块西移而在洋底留下一条由死火山形成的海山链,经年龄值4000万年的中途岛转折而成向北西延伸的皇帝海岭,一直到阿留申岛西端,年龄增至7500万年。 地 幔柱估计至少来自 700 千米或更深处 ,直径大致在100~250千米左右,上升速率约每年几厘米,由此导致地幔顶部成直径达上百千米的穹状隆起 ,高出四周约 1~2千米。全球热点大多位于洋中脊的转折拐点或三联点上,少数在板块内部,总共约30余个。陆上较少,约5个。 |
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