白云石化

塔北东段下奥陶统白云石化作用

Dolomitization of Lower Ordovician in eastern sector of North Tarim Region

鄂尔多斯碳酸盐岩去白云石化及其与储集性的关系

DEDOLOMITIZATION of carbonate rocks in Ordos and its relation to reservoir property

深埋藏高盐度热水条件下白云石化；

Dolomitization under deep - buried , high-salinity , hot water conditions ;

太原西山中奥陶统脱白云石化定量研究

Quantitative study on DEDOLOMITIZATION of Middle Ordovician Series in West Mountain , Taiyuan

单水化含白云石的石灰晶粒白云岩有两种成因：一为回流渗透白云石化；二为深埋藏白云石化。

Monohydrate dolomitic lime Crystalline dolostone is formed by seepage-reflux dolomitization and burial dolomitization .

进行了白云石化分区分带研究，为下步勘探部署指明了方向。

Distribution research of dolomitization is made , and next exploration target is pointed out .

矿化表现为“硅化、白云石化、黄铁矿化”组合。

The gold mineralization is represented by the association of silicification , dolomitization and pyritization .

白云石晶体的有序度与去白云石化反应

Ordered index and DEDOLOMITIZATION of dolomite crystals

认为不同类型的白云岩形成于不同的沉积环境，其白云石化模式也不相同。

It is concluded that different dolomites formed in different environments have different models of dolomitization .

储集岩主要是礁滩相灰岩白云石化后被溶解所形成。

The main reservoir rocks formed from limestones of reef-bank facies which was dolomitizationed and then dissolved .

埋藏白云石化及晚期溶蚀作用对形成有利储集空间具有最重要的贡献。

Burial dolomitization and dissolution is the most important contribution on the formation of favorable reservoir space .

近年来，关于白云石化作用及白云岩问题，取得了更深层次的发展。

Nowadays , the progress of research about dolomitization and the issue of dolostone has been acquired .

白云石化部分为混合水成因，部分为晚成岩期交代成因。

The dolomitization is interpreted to have a mixed water origin , or a late diagenetic replacement origin .

米级旋回层序揭示了高频海平面变化引起的海水淡水和盐水淡水混合水白云石化。

The meter scale cyclic sequences reveal the mixing water dolomitization resulted from frequent fluctuation of sea level .

鄂尔多斯地区奥陶系马家沟群中部块状白云岩的深埋藏白云石化机制

Mechanism of Deep Burial Dolomitization of Massive Dolostones in the Middle Majiagou Group of the Ordovician , Ordos Basin

川东北长兴组埋藏白云石化流体来源与油气倒灌式成藏

Fluid origin of burial dolomitization and hydrocarbon accumulation model of backward charging in Changxing formation , NE Sichuan basin

白云石化作用，以早成岩阶段混合水白云石化作用为主，埋藏白云石化作用次之。

The dolomitization is dominated by mixed water dolomitization in the early diagenetic stage , followed by burial dolomitization .

对储集空间贡献最大的是白云石化作用，其次是淡水淋滤溶蚀作用和构造破裂成缝作用。

The dolomitization , fresh water leaching process , dissolution and fracture-formed process came to the main reservoir space .

白云岩研究的热点问题及研究发展方向可以归纳为五个方面：全球气候变化与白云石化事件；

The research hotspots and trends on dolostone can be concluded as : ( 1 ) global climate change and dolomitizationevents ;

有三种成岩作用类型有助于区分加里东中期和海西早期岩溶，它们分别是缝合线、与缝合线相关的埋藏白云石化及其相关的去白云石化。

Three diagenesis types are help to differentiate the middle Caledonian and early Hercynian karst , which are stylolite , dolomitization and dedolomitization .

区内碳酸盐岩成岩作用复杂，类型多样。以溶蚀作用、白云石化作用、破裂作用为主。

The diagenesis of the work area , which mainly includes karst , dolomization and fracturing is of great complexity and of many types .

在北带，泥盆纪白云岩，是由台盆&浅海陆棚相碎屑沉积物，在埋藏压实的条件下，经白云石化而成。

In the northern belt of Qinling , the Devonian dolomite was formed by elastic sediments of platform-basin-shelf fecies through dolomization under buried and pressed conditions .

本区成岩现象较多，成岩变化复杂，通过镜下观察到的成岩现象主要有压实压溶、充填、白云石化、重结晶、褐铁矿化、溶蚀及与构造有关的破裂作用等。

The main diagenesis observed through the microscope are pressure solution compaction , filling , dolomitization , recrystallization , limonitization , corrosion and fracturing related structure .

有序度低的白云石晶体去白云石化反应的扩散活化能、界面化学反应活化能和晶体成核与生长活化能也低，低有序度的白云石具有高的反应性。

The dedolomitization reaction of dolomite crystals with low ordered index occupies low active energy of diffusion , interfacial chemical reaction as well as nucleation and growth .

其中，最密切的围岩蚀变类型为白云石化、硅化，种种证据表明，碲矿床的富集与白云石化具有非常密切的关系。

The most important alteration types are dolomitization and silicification . All evidences suggest that the enrichment of tellurium has a very close relationship to the dolomitization .

考虑沉积作用的成层地基自重应力与沉降计算矿体有沉积似层状和交代不规则状两种形态，主要围岩蚀变为硅化和铁白云石化。

ON COMPUTATION OF OVERBURDEN PRESSURE AND SETTLEMENT FOR LAYERED SOIL CONSIDERING SEDIMENTATION Ore bodies show different forms i. e. layered bodies of sedimentation and irregular bodies of replacement .

其中，对储层孔隙起建设性的成岩作用为白云石化作用、表生岩溶作用、埋藏溶解作用；对储层孔隙起破坏性的成岩作用为去白云石化作用、各种矿物充填作用等。

Among them , dolomitization , supergene karstification and burial dissolution play a constructive diagenesis for reservoir porosity , the destructive diagenesis for reservoir porosity is dedolomitization , mineral packing action .

韧性剪切带内构造岩、围岩蚀变分带明显，并具有典型的（超）糜棱岩石英、黄铁矿、铁白云石化金矿化等三位一体成矿特征。

In the ductile shear belt , the alteration and zonation of tectonite and wall rock are obviously , and miliolite belt , quartz , iron pyrite , ankerite alteration belt and gold mineralization belt are trinity .

实验和理论证明，碱&碳酸盐反应是由于去白云石化在原地产生，这种局部化学反应和结晶压是引起膨胀的根本原因。

Both experimental results and theoretical analyses show that the reaction of dedolomitization is carried out in situ , and both the topochemical reaction and the pressure of crystallization of brucite growing are the essential causes of the expansion due to ACR .

进而，利用西郊的测试数据定量研究了含水层中水-岩相互作用，得到脱白云石化过程的Mg2+/SO42-比值，对地下水样品进行水化学及污染特征示踪。

Then , the samples from Xijiao are studied for the water-rock interaction of the aquifers . The Mg2 + / SO42 - ratios during the dedolomitization process are obtained and the tracers show the characteristics of the hydro-geochemistry and pollution of the water .