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H2O-NaCl-CO2三元混合流体在岩浆、变质和热液系统中很常见,在成岩和成矿中发挥着重要作用。造山型金矿是世界上最为重要的金矿床类型,矿化以多期H2O-NaCl-CO2±CH4流体叠加成矿为特征。衡量热液系统中流体相平衡和热力学性质(PVTx),对分析成矿流体演化和成矿作用发挥着重要作用。然而早期大量的模拟研究,基于其简便性,多以H2O-NaCl和H2O-CO2二元系统近似描述地质系统中的热液...
H2O-NaCl-CO2三元混合流体在岩浆、变质和热液系统中很常见,在成岩和成矿中发挥着重要作用。造山型金矿是世界上最为重要的金矿床类型,矿化以多期H2O-NaCl-CO2±CH4流体叠加成矿为特征。衡量热液系统中流体相平衡和热力学性质(PVTx),对分析成矿流体演化和成矿作用发挥着重要作用。
针对不同质量配比的膨润土-红黏土混合土压实样,开展不同浓度的NaCl溶液渗透试验;基于扩散双电层理论和土颗粒微观结构,分析溶液浓度对不同质量配比混合土渗透系数的影响机理;根据试验结果,建立混合土渗透系数与膨润土掺量(质量分数)的函数关系式。研究结果表明:混合土的渗透系数随着膨润土掺量的增加而降低,膨润土的加入明显提高了混合土的防渗和化学阻滞能力;随着溶液浓度提高,红黏土的絮凝程度增加,渗透系数降低...
石英在热水溶液中的溶解度对地球化学和岩石学的研究都极为重要。我们提出一个能够适用于H2O-CO2-NaCl复杂流体成分,高温高压(0~1000℃,0~1.5GPa)条件下的石英溶解度计算模型,形式如下:
logmSiO2=A(T)+B(T)·logMH2O/VH2O*+C(t)·logxH2O
其中A(T)、B(T)、C(t)均为温度T(K)和t(℃)的多项式。xH2O和VH2O*分别代表流...
NaCl-H2O体系中WO3溶解度超临界现象实验探讨
超临界现象 临界区域 溶解度 钨矿床
2009/5/18
以适量Na2WO4·2H2O, HCl, NaCl和H2O为原料, 从过饱和的角度对4.0% NaCl水溶液中WO3溶解度的超临界现象进行实验探讨. 压力恒定在34 MPa, 接近临界压力31.4 MPa, 温度变化于250~550℃之间, 在快速淬火高压釜中进行实验. 结果表明在临界区域内, WO3溶解度具有超临界现象, 溶解度对温度、密度的变化反应敏感. 本实验温、压条件与许多钨矿床成矿流体的...
利用水热金刚石压腔研究了高温高压下0.0%、5.0%、10.0%和 20.0%的NaCl-H2O体系的Raman光谱,研究结果发现: 对于盐度一定的NaCl-H2O体系,当压力不变时,水的Raman伸缩谱峰的波数变化量Δν(O-H)随温度的升高而不断增加; 当压力不同时,Δν(O-H)随温度的变化关系(偏移斜率S)不受压力的影响,而只与盐度相关。利用该性质可以用来确定流体包裹体的盐度(W),其计算...
红透山块状硫化物矿石主要成分为黄铁矿、磁黄铁矿、黄铜矿、闪锌矿和石英、角闪石、黑云母等脉石矿物。切成长40mm 直径17mm 的矿石圆柱用20wt%NaCl 溶液浸泡260小时后装入长江500型活塞-圆筒式三轴应力试验机,在362℃414MPa 围压下加1342MPa 轴压,13小时后于空气中自然冷却。实验后试样长度压缩为32.3mm,算得应变速率为4.1×10~(-6)/s。实验产物中出现大量垂...
中高盐度NaCl—H2O包裹体的密度式和等容式及其应用
密度式 等容式 流体包裹体
2010/9/7
由于现有的盐水溶液热力学状态方程比较复杂,对于盐水包裹体使用很不方便.笔者在已推导的低盐水包裹体热力学公式基础上,根据实验数值,采用数学拟合法,得到中高盐度(≥23.3%)NaCl-H2O溶液包裹体较精确的流体密度计算式:ρ(g/cm3)=A+B·th+C·th2(A=A0+A1·w+A2·w2;B=B0+B1·w+B2·w2:C=C0+C1·w+C2·w2)和包裹体等容式:p(×105Pa)=a...
High-pressure X-ray diffraction study on the structure of NaCl melt using synchrotron radiation
NaCl high-pressure X-ray synchrotron radiation
2012/3/30
MoltenNaClwasanalyzedbyhigh-pressureX-raydiffractionexperimentsusingsyn-
chrotronradiationupto5GPaand1600Calongthemeltingcurve.Theinterference
function Qi(Q)andthecorrelationfunction g(r)werederived...
Phase relations in the system MgO-NaCl-H2O: The dehydroxylation of brucite in the presence of NaCl-H2O fluids
Phase relations MgO-NaCl-H2O dehydroxylation NaCl-H2O fluids
2012/3/31
The dehydroxylation of brucite was determined in the presence of NaCl-H2O fluids containing 0, 2, 6, 11, 14, 18, 30, and 38 mol% NaCl (0.0, 5.5, 17.0, 28.8, 34.5, 41.7,58.2, and 66.6 wt% NaCl) to ;250...
NaCl不饱和的海水体系卤水—矿物平衡研究
NaCl 不饱和 海水体系
2010/9/20
本文用实验的方法研究了K,Na,Mg,Cl,SO4-H2O体系在NaCl不饱和条件下的卤水-矿物平衡关系,并与该体系对NaCl饱和的相图作了对比。研究成果有利于更深入地探讨盐类矿床的形成和演化,对钾盐生产工艺的制订亦有重要指导作用。本文对四川盆地富钾卤水的成因作了合理的解释。
Molecular dynamics of NaCl (B1 and B2) and MgO (B1) melting: Two-phase simulation
Molecular dynamics NaCl (B1 and B2) MgO (B1) Two-phase simulation
2012/4/5
Melting of NaCl and MgOhas been simulated witha two-phase molecular dynamics method at constant pressure using newly developed interaction potentials. Equations of state for NaCl and MgOsimulated by m...
Structural Characterisation of Kaolinite:NaCl Intercalate and its Derivatives
FTIR Intercalate Kaolinite NaCl NMR Structure Synthesis XRD
2011/12/31
Kaolinite:NaCl intercalates with basal layer dimensions of 0.95 and 1.25 nm have been prepared by direct reaction of saturated aqueous NaCl solution with well-crystallized source clay KGa-1. The inter...
Crystalline Swelling of Smectite Samples in Concentrated NaCl Solutions in Relation to Layer Charge
Electrolyte Layer charge Smectite Swelling Vapor pressure X-ray powder diffraction
2011/12/31
The basal spacing of a set of smectites, with layer charges between 0.74 and 1.14 electrons per unit cell, have been measured while the smectites were in equilibrium with NaCl solutions having concent...
Hydration States of Smectite in NaCl Brines at Elevated Pressures and Temperatures
Brine Diagenesis Hydration Pressure Smectite Temperature
2012/1/12
A high-pressure, high-temperature cell was used to monitor the basal X-ray powder diffraction spacing of Na-saturated Cheto montmorillonite in contact with NaCl solutions at temperatures as high as 20...