出溶白云石述评REVIEW ON EXSOLUTION DOLOMITE
邬金华
摘要(Abstract):
本文介绍了出溶白云石的定义和形成过程,并用晶体化学的观点强调了镁方解石在压力增高的情况下会通过阳离子的有序调整采取出溶形式向稳定矿物相白云石和方解石转变.温度升高虽然可使出溶速度加快,但低温对离子的有序调整更为有利.在自然界,不仅在变质条件下白云石可以从镁方解石中出溶出来,在正常海洋环境中,镁方解石沉积也可被适当压力诱发产生出出溶白云石.
关键词(KeyWords):
基金项目(Foundation):
作者(Author): 邬金华
Email:
DOI:
参考文献(References):
- [1]Althoff,P.L.,Structural refinements of dolomite and a magnesian calcite and implications for dolomite formation in marine environment,Amer.Mineralogist,1977,Vol.62,pp.772~783
- [2]Chave,K.E.,A solid solution between calcite and dolomlte,Jour.Sed.Petrology,1952,Vol.60,pp.190~192
- [3]Goldsmith,J.,Exsolution of dolomite from caicite,Jour.Geology,1960,Vol.68,pp.103~109
- [4]Goldsmith,J.R.and Heard,H.C.Subsolidus phase relations in the system CaCO_3-MgCO_3,Jour.Geology,1961 Vol.69,pp.45~74
- [5]Graf,D.L.and Goldsmith,J.R.,Dolomite-magnesian calcite relations at elevated temperatures and CO_2 pressures,Geochim.et Cosm.Acta,1955,Vol.7,pp.109~128
- [6]Graf,D.L.and Goldsmith,J.R.,Some hydrothermal syntheses of dolomite and protodolomite,Jour.Geology,1956,Vol.64,pp.173~186
- [7]Harker,R.J.and Tuttle,O.F.,Studies in the system CaO-MgO-CO_2:Part 2,Limits of soid solution along the binary join CaCO_3-MgCO_3,Amer Jour.Sci.,1955,Vol.253,pp.274~282
- [8]Joplin,G.A.,The exogeneous contact zone at Ben Bullen,New South wales,Geology Magazine 1935,Vol.72,pp.385~400
- [9]Land,L.S.,Diagenesis of skeletal carbonates,Jour.sed.Petrology,1967,Vol.37,pp.914~930