magnesiae magma
- magnesiae magma的基本解释
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[医] 镁乳[浆], 氢氧化镁合剂
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The formation and evolution of magma have experienced three stages:① thermal fluid led to higher partial melting of lithosphere mantle and then formed hypoalkaline basalt with saturated initial sulfur when ascending asthenosphere contacted with the lithosphere mantle;② the initial magma intruded into the lower crust to form magma chamber, the crystallization of magma produced stratiform-like cumulate, including olivine, hypersthene, augite, magnetite, and then formed residual gabbroic magma with the participance of crustal material;③ the residual magma and ore-bearing cumulate intruded upward successively to shape original mafic complex rocks in Wuxing when the magma chamber cracked.
岩浆形成与演化经历了3个阶段:①上升的软流圈与岩石圈地幔接触,热流体作用导致岩石圈地幔发生高度部分熔融,形成初始硫饱和的次碱性玄武岩;②初始岩浆上侵,在下地壳形成岩浆房,岩浆结晶作用形成以似层状橄榄石、紫苏辉石、普通辉石和磁铁矿等为主的堆晶岩,在地壳物质的参与下形成残余辉长质岩浆;③岩浆房破裂,残余岩浆和含有熔体(0%)的堆晶岩相先后上侵形成五星原始镁铁质杂岩。
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From the Late Carboniferous to the Permian, Junggar region into the post-collision tectonic evolution stage, in the stage of the post-collision, the early subduction slab rupture and separate, asthenosphere decompression melting, basalt magma take place underplating, because the underplating of the basalt magma, low crust melt by the high temperature forming the acid crust-magma, the basic magma from mantle and acid one from crust mixing at the vicinity of the crust-mantle boundary, formed the Huangyangshan magma mixing plution, the dioritic microgranular enclaves are the recorder of the crust and mantal magma mixing process.
从晚石炭世到二叠纪,准噶尔地区进入后碰撞构造演化阶段,在后碰撞构造阶段,早期的俯冲板片断离,软流圈减压熔融,玄武质岩浆底侵至下地壳底部,底侵基性岩浆带来的巨大热量,导致地壳物质熔融,形成大规模的花岗质岩浆,两种岩浆在壳-幔边界附近发生不同程度的混合,其中闪长质微细粒包体就是基性的幔源岩浆和酸性的壳源岩浆不同程度的混合的记录者。
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The feature of oxygen isotope for magnetite from Abagong iron deposit reflects that the water in the fluid of mineralization resides in the initial magma, implying the magma genesis of mineralization. The similaritary features of REE and trace elements for coexisting apatite with magnetite in the Abagong, the Kiruna type and the Ninwu porphyrite iron deposit show their common genesis, indicating that Abagong iron deposit resulted from the intrusion of late ore magma due to the magma differentiation. The characteristic of sulfur isotope composition implies that the Abagong iron deposit resides in basaltic magma from mantle resource.
阿巴宫铁矿磁铁矿氧同位素特征反映了成矿流体中水来源于原始岩浆水,暗示该铁矿的岩浆成因;与磁铁矿共生的磷灰石稀土和微量元素特征与Kiruna型铁矿以及宁芜玢岩铁矿中磷灰石特征非常相似,表明它们具有相同的成因机理,反映出阿巴宫铁矿为岩浆分异的晚期矿浆贯入式成因;其硫同位素特征表明成矿物质源自幔源的玄武质岩浆。
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