搜索结果: 1-8 共查到“理学 Fe-Mg”相关记录8条 . 查询时间(0.062 秒)
地幔过渡带最重要的两种矿物分别是瓦兹利石（410-520公里）和林伍德石（520-660公里），它们各自的体积分数在相应深度范围大约占60 vol%左右。高压实验和天然金刚石包裹体研究都表明林伍德石晶格结构中含有大量的水（至少1.5 wt.%），因此地幔过渡带被认为是地球内部水的主要储库。已有研究显示，即使微量水也会显著影响矿物岩石的物理化学性质，比如电导率、扩散、弹性等。铁和镁是地球及类地行星上...
铁（Fe）和镁（Mg）作为地幔中主要的组成元素可以有效地指示地幔演化和深部过程。近年来开展的地幔Fe-Mg同位素研究表明：幔源岩浆的Fe同位素差异与部分熔融程度有关，而部分熔融几乎不会导致地幔源区的Fe同位素分馏；地幔具有均一的Mg同位素组成，部分熔融过程中不发生Mg同位素分馏(图1)；地幔交代作用造成的Fe-Mg同位素分馏与熔体组成和性质有关；Fe同位素分馏与氧逸度相关，Fe3+(高氧逸度)相对...
Temperature dependence of Fe,Mg partitioning in Acapulco olivine
Temperature dependence Fe Mg partitioning Acapulco olivine
2012/4/1
The temperature dependence of the intracrystalline Fe,Mg partitioning (K ) in two olivine crys-
tals (Fa) separated from the Acapulco meteorite was determined by single-crystal X-ray structure
analy...
Fe,Mg,Mn-bearing phosphates in the GRA 95209 meteorite: Occurrences and mineral chemistry
Fe,Mg,Mn-bearing phosphates GRA95209 meteorite Occurrences mineral chemistry
2012/4/1
Two large regions of Fe,Mg,Mn-bearing phosphates, together with metal and various silicate phases,
have been observed in the GRA 95209 meteorite (a primitive achondrite belonging to the acapulcoite(R...
Fe-Mg order-disorder in tremolite-actinolite-ferro-actinolite at ambient and high temperature
Fe-Mg order-disorder tremolite-actinolite-ferro-actinolite temperature
2012/3/31
The crystal structures and M-site populations of a series of unheated and heat-treated,near-binary members of the actinolite series were determined from single-crystal X-ray diffraction data. Small, s...
Experimental study of the Fe-Mg exchange between garnet and biotite: Constraints on the mixing behavior and analysis of the cation-exchange mechanisms
Experimental study Fe-Mg exchange garnet biotite: Constraints mixing behavior cation-exchange mechanisms
2012/4/6
NewexperimentaldataarepresentedfortheFe-Mgexchangebetweengarnetandbiotiteinthetemperaturerange600¤C80Cat0.2GPa.TheFe-Mg-Almixingpropertiesof
biotitewereevaluatedandthegarnet-biotitegeothermometerwasr...
Complete Fe-Mg solid solution in lithium niobate and perovskite structures in titanates at high pressures and temperatures
Complete Fe-Mg solid solution lithium niobate perovskite structures titanates high pressures temperatures
2012/4/5
Anewhigh-pressureMgTiO phasewiththelithiumniobatestructure(R3c)hasbeen
roveredfromexperimentsat21GPaand1200C.Phaseswiththelithiumniobate
structurewerealsosynthesizedforintermediatecompositionsbetwee...
Domain Segregation in Ni-Fe-Mg-Smectites
Chemical composition Laterite Mossbauer spectroscopy Nickel Nontronite Pimelite Smectite Transmission electron microscopy
2011/11/25
Abstract: The first stage of lateritic weathering of pyroxenes in the Niquelandia area, Brazil, leads either to Fe-rich products or to a phyllosilicate clay. In relatively unfractured parent rock the ...