| 利用H2O-NaCl-CaCl2体系水盐化合物和冰的融化温度计算NaCl/（NaCl＋CaCl2）比值和盐度的方程 |
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| 作者姓名： | Guoxiang Chi Pei Ni |
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| 作者单位： | GuoXiang CHI~(1*) Pei NI~(2**) 1.Department of Geology，University of Regina，3737 Wascana Parkway，Regina，Saskatchewan，Canada S4S 0A2 2.State Key Laboratory for Mineral Deposit Research，Institute of Geo-fluid Research，Department of Earth Science，Nanjing University，Nanjing 210093，China |
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| 基金项目： | This study is supported by an NSERC grant （to Chi）. The first author would like to thank the late Dr. Kees Schrijver for providing a copy of Yanatieva＇s （1946） paper in Russian. Qun Wang is thanked for assistance in development of the Windows program. |
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| 摘 要： | The composition of fluid inclusions in the H_2O-NaCl-CaCl_2 system has been generally graphically estimated using the melting temperatures of hydrohalite(T_(m-HH))and ice(T_(m-ice)).Here we present two equations that can be used to calculate the relative proportion of NaCl(i.e.,NaCl/NaCl CaCl_2],or X_(NaCl))and the total salinity( i.e.,NaC1 CaC12,wt% )for fluid inclusions with ice as the last melting phase.X_(NaCl)can be calculated from T_(m-HH)using the following equation: y=(a bx)~(-1/c) where y is X_(NaCl),x is T_(m-HH),a=0.33124402,b=-0.031518028,and c=0.22932736.In the cases where only T_(m-ice)is measured and T_(m-HH)is not known,T_(m-ice)can be used as the maximum possible TIn.nil to calculate the maximum value of X_(NaCl)using the above equation.In these cases,the following equation can be used to calculate the maximum total salinity: y=(a bx cx~2)~(-1) where y is salinity,x is T_(m-HH),a=0.057184817,b=0.00078565757,and c=5.7262766E-6.Because the isothems in the field of ice are sub-parallel to the NaCl-CaCl_2 binary side in the H20-NaC1-CaC12 ternary system,the errors in salinity calculation introduced by the above approximation are small(less than 2 wt% ).A Windows program for calculation of X_(NsCl)and salinity is available at: http://uregina.ca/～chiguox.
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| 关 键 词： | 水盐化合物 冰 融化温度 计算 氯化钠 氯化钙 比值 |
| 文章编号： | 1000-0569/2007/023（01）-0033-37 |
| 修稿时间： | 2006-06-03 |
Equations for calculation of NaCl/( NaCl + CaCl2 ) ratios and salinities from hydrohalite-melting and ice-melting temperatures in the H2O-NaCl-CaCl2 system |
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| Guoxiang Chi Pei Ni.Equations for calculation of NaCl/( NaCl + CaCl2 ) ratios and salinities from hydrohalite-melting and ice-melting temperatures in the H2O-NaCl-CaCl2 system[J].Acta Petrologica Sinica,2007,23(1):33-37. |
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| Authors: | GuoXiang CHI Pei NI |
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| Institution: | 1. Department of Geology, University of Regina, 3737 Wascana Parkway, Regina, Saskatchewan, Canada S4S 0A2
2. State Key Laboratory for Mineral Deposit Research, Institute of Geo-fluid Research, Department of Earth Science, Nanjing University,Nanjing 210093, China |
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| Abstract: | The composition of fluid inclusions in the H2O-NaCl-CaCl2 system has been generally graphically estimated using the melting temperatures of hydrohalite ( Tm-HH ) and ice ( Tm-ice ). Here we present two equations that can be used to calculate the relative proportion of NaCl ( i. e. , NaCt/ NaCl + CaCl2 ], or XNaCl) and the total salinity ( i. e. , NaCl + CaCl2, wt% ) for fluid inclusions with ice as the last melting phase. XNaCl can be calculated from Tm-HH using the following equation:y= ( a + bx)-1/c where y is XNaCl, x is Tm-HH, a =0. 33124402, b = -0.031518028, and c =0. 22932736. In the cases where only Tm-ice is measured and Tm-HH is not known, Tm-ice can be used as the maximum possible Tm-HH to calculate the maximum value of XNaCl using the above equation. In these cases, the following equation can be used to calculate the maximum total salinity: y = (a +bx +cx2) -1 where y is salinity, x is Tm-HH, a = 0. 057184817, b = 0. 00078565757, and c = 5. 7262766E-6. Because the isothems in the field of ice are sub-parallel to the NaCl-CaCl2 binary side in the H2O-NaCl-CaCl2 ternary system, the errors in salinity calculation introduced by the above approximation are small ( less than 2 wt% ). A Windows program for calculation of XNacl and salinity is available at: http ://uregina. ca/～ chiguox. |
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| Keywords: | NaCl/[ NaCl CaCl2 ] Total salinity H2O-NaCl-CaCl2 system Fluid inclusions |
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