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摘要: 对来自海拉尔盆地40口井的白垩系火山碎屑岩样品显微镜观察与分析显示,火山碎屑岩的成岩作用具有特殊性,表现在熔结作用、脱玻化与重结晶作用、粘土矿物形成与转变和交代作用等方面。熔结作用可以区分出熔浆/熔岩熔结、浆屑熔结和热灰熔结三种类型。脱玻化与重结晶作用常常是交织在一起,流纹质玻璃物质经脱玻化,并进一步重结晶,常具有特殊的结构,呈现一种复杂的硅质胶结样式。粘土矿物形成与转变在成岩作用早期就开始了,如蒙脱石化。一些特征性矿物如浊沸石、绿泥石的出现也不代表变质作用的开始,而是特定成岩环境的产物。碳酸盐的交代-胶结和溶解在火山碎屑岩中普遍发育,使得原岩面貌发生了严重的改变。成岩作用的特征揭示海拉尔盆地火山碎屑岩的成分和结构演变,这在测井岩性解释和孔隙度预测上具有意义。Abstract: The microscopic study and analysis of the Cretaceous volcaniclastic samples from 40 drilling wells in Hailaer Basin show that, the speciality of the diagenesis is presented in welding, devitrification and recrystallization, formation and transform of clay minerals and replacement etc. There are three types of welding textures identified as weldings of magma or lava, magma fragment and hot ash. Devitrification and recrystallization were combined, showing special textures, such as a complex cementation of quartzs and siliceous matter resulted from the devitrification of rhyolitic glass and recrystallization. The forming and transforming of clay minerals started early at the initial stage of diagenesis, such as occuring of smectite. Lomonite and chlorite, some diagnostic minerals, would be products of special diagenesis rather than signs of beginning of metamorphism. The replacement-cementation and dissolution developed well in the volcaniclastic rocks during diagenesis, giving some great changes to the original types of rocks. The characteristics of diagenesis reveals the evolution of components and textures of the volcaniclastics in Hailaer Basin, which is useful to the lithological interpretation of loggings and prediction of porosity.
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Key words:
- Volcaniclastic rock /
- Diagenesis /
- Speciality /
- Hailaer Basin
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[1] Coombs DS,The nature and alteration of some Triassic sediments from Southland,New Zealand,Roy Soc New Zealand Trans,1954.
[2] Einsele G,Sedimentary Basins:Evolution,Facies and Budget,Beilin:Springer-Verlag,2000.
[3] Fisher RV,Schmincke HU,Pyroclastic Rocks,Beilin:Springer-Verlag,1984.
[4] Fnscolos AE,Catsgenesis of argillaceous sediments rocks,Geoscience Canada,1987.
[5] Garcia-Homero E,Vegas J,Baldonedo JL,Marfil R,Clay minerals as alteration products in basaltic volcaniclnstic deposits of La Palma(Canary Islands,Spain),Sedimentary Geology,2005.
[6] Gifkins CC,Allen RL,Mcphie J,Apparent textures in altered pumice-rich rocks,Journal of Volcanology and Geothermal Research,2005(29).
[7] Liu BJ,Zhang JQ,Diagenesis of Sedimentary Racks,北京:科学出版社,1992.
[8] Liu L,Gao YQ,Qu XY,Meng QA Gao FH Ren YG and Zhu DF,Petrology and carbon-oxygen isotope of inorganic CO_2 gas reservoir in Wuerxun depression,Hailaer basin,Acta Petrologica Sinica,2006(8).
[9] Liu WZ,Pang YM,Wu HY,Gao YF Men GT and Ran YG,Relationship between pore-space evolution and deeply buried alteration during diagenetic stage of the volcanic fragments in reservoir greywacke from the Songliao Basin,NE China,Journal of Jilin University(Earth Science Edition),2007(4).
[10] Pittman ED,Recent advances in sandstone diagenesis,Annual Review of Earth and Planetary Sciences,1979.
[11] Schmoker J-W,Gautier DL,Sandstone porosity as function of thermal maturity,Geology,1988.
[12] Siever R,Plate-tectonic controls on diagenesis,Journal of Geology,1979(2).
[13] Sun SP,Liu YS,Zhang R,Bai ZD,Li JZ,Wei HQ and Zhu QW,Classification of pyroclastic rocks and trend of volcanic sedimentology:A review,Acta Petrologica et Mineralogica,2001(3).
[14] Wang PJ,Fang ZQ,Liu WZ,Chen SM,Shah XL,Wu HY,Cheng RH,Wang YH,Ren YG,Feng ZH,Huang W,Tang HF and Huang YL,Volcanic Rocks in Petrolifemns Basins:Petrography,Facies,Reservoir,Pool,Exploration,北京:科学出版社,2008.
[15] Wu HR,Li ZS,Fang ZH,Zhu DE,Analysis on structural features and reservoir forming process of Wuerxun and Beier sags in Hailaer Basin,Acta Petrolei Sinica,2006(zk).
[16] 刘宝珺,张锦泉,沉积成岩作用,北京:科学出版社,1992.
[17] 刘立.高玉巧.曲希玉.蒙启安.高福红.任延广.朱德丰 海拉尔盆地乌尔逊凹陷无机CO2气储层的岩石学与碳氧同位素特征 [J].-岩石学报2006(8)
[18] 刘万洙.庞彦明.吴河勇.高有峰.门广田.任延广 松辽盆地深层储层砂岩中火山碎屑物质在成岩阶段的变化与孔隙发育 [J].-吉林大学学报（地球科学版）2007(4)
[19] 孙善平.刘永顺.钟蓉.白志达.李家振.魏海泉.朱勤文 火山碎屑岩分类评述及火山沉积学研究展望 [J].-岩石矿物学杂志2001(3)
[20] 王璞珺,冯志强,刘万洙,陈树民,单玄龙,吴何勇,程日辉,王玉华,边伟华,任延广,冯子辉,黄薇,唐华风,黄玉龙,盆地火山岩:岩性、岩相、储层、气藏、勘探,北京:科学出版社,2008.
[21] 吴河勇.李子顺.冯子辉.朱德丰 海拉尔盆地乌尔逊-贝尔凹陷构造特征与油气成藏过程分析 [J].-石油学报2006(z1)
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