Phase equilibria and thermodynamic properties of lower crustal and uppre mantle minerals.

1.橄榄石和单斜辉石在CaO-FeO-MgO-SiO_2(A)体系中的热力学性质从理论上研究了钙-铁-镁矿物的热力学性质，橄榄石表现为无序的双位溶液。(2)钙铁镁在橄榄石和辉石之间的分配实验表明，钙镁分配系数高度依赖于橄榄石中CaO的含量，并随体系中Ca~(2+)和Gt~(2+)及Fe/(Fe+)的增加而增大(高压科学版)。(C)单斜辉石的混合特性被近似为时间多位规则溶液配合晶体内交换平衡(Geochem.(D)对橄榄石Ca-Fe-Mg溶液的实验研究表明，橄榄石是Fe~(2+)和Mg~(2+)稀疏混合的两位规则溶液，而橄榄石(Olivi…)M2位上的Ca~(2+)和Mg~(2+)是严格配分的。更多Ne(已提交给上午矿物。)2.对FeO-MgO-Al_2O_3-SiO_2体系从下地壳到上地幔压力的相平衡进行了实验研究：(A)Fe-Mg在斜方辉石和堇青石之间的时间分配表明，该反应对温度变化很敏感，是一种很好的地质温度计。NIPR符号，南极洲。(B)在Mg_3Al_2Si_3O_12&gt；体系中，斜方辉石+堇青石+尖晶石的矿物组合不稳定，在10000℃至102500℃的一定温度下转变为橄榄石+堇青石+尖晶石。阿索克。宠物。敏。经济上。(C)Al_2O_3在尖晶石+石英和蓝宝石+石英组合中的高压实验表明：在1300ﾟC时，单一反应的相界为：2MgAl_20_4(Spi)+SiO_2(Qtz)=Mg_2Al_4Si0_t；10&gt；(Spr)矿物。汽油。)。较少

My research results are summarized as follows :1. Thermodynamic Properties of Olivine arid Clinopyroxene in the System CaO-FeO-MgO-SiO_2(a) Olivine behaves as the disordered two-site solution from the theoretical study on the thermodynamic properties of Ca-Fe-Mg divines (Mineral. 1., 20, 135-149, 1998).(b) Experiments on the Ca-Fe-Mg partitioning between olivine and chnopyroxene make it clear that the Fe-Mg distribution coefficient is highly dependent on CaO contents of olivine, and increases with increasing in Ca^<2+> and Fe/(Fe+Mg) in the system (Rev. High Pressure Sci. Tecnol., 7, 95-97, 1998).(c) Mixing propeties of clinopyroxene are approximated as time multi-site regular solution cooperating intracrystalline exchange equilibria (Geochem. J., 33, 33-58, 1999).(d) Experimental study on the solvus of Ca-Fe-Mg olivine shows that the ohivine is the two-site regular solution in which the Fe^<2+> and Mg^<2+> are radomly mixing although Ca^<2+> are strictly lucallized in M2 site of olivi … More ne (submitted to Am. Mineral.).2. Experimental Study of Phase Equilibria in the system FeO - MgO - A1_20_<>3 - SiO_2 from the Lower Crust to the Upper Mantle pressures.(a) Time Fe-Mg partitioning between orthopyroxene and cordierite shows that this reaction is sensitive for the variation of temnprature, and this would be a good geothermometer (Proc. NIPR Symp., Antarct. Geosci., 10, 150-159 1997).(b) The mineral assemblage of orthopyroxene+cordierite+spinel is unstable and changes into the olivine+cordierite+spinel at a certain temperature between 10000C and 102500 at 1 atm in the Mg_3Al_2Si_3O_<12> system (J.Japan. Assoc. Pet. Min. Econ. Geol., 93, 18-26, 1998).(c) high pressure experiments on the AI_2o_3 solubility in orthopyroxene in equi1ibium with in assemblages of spinel+quartz and sapphirine+quartz in time Mg_3AI_2Si_3O_<12> (pyrope composition) system shows the phase boundary of the univariant reaction : 2MgAI_20_4 (SpI) + Si0_2 (Qtz) = Mg_2Al_4Si0_<10> (Spr), locates within a certain pressure between 1.5 and 1.75 GPa at 1300ﾟC (prepareing to Contrib. Mineral. Petrol.). Less