流体参与下的岩石破裂机制及其分形特征
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摘要
流体参与下的岩石破裂机制一般分为爆发作用、流化作用和液压致裂等,其分维值大小一般遵循爆发作用→流化作用→液压致裂。通过对凤凰山铜矿II号矿体不同地段的角砾岩进行分形统计分析,判明其属于液压致裂角砾岩,验证了分维值的大小与致裂能量之间的正相关关系。
The mechanisms of fluid-assisting rock fracture is divided into outburst fracturing 、fluid-chemical fracturing and hydraulic fracturing,,etc.The worth size of fractal follows generally Principle that outburst fracturing is larger than fluid-chemical fracturing and fluid-chemical fracturing is larger than hydraulic fracturing.Fractal statistical computation is given to the breccias associated with the ore body II,typical ore body in the Fenghuangshan deposit.It is judged that rock fracture results from the hydraulic fracture mechanism and there is a positive related relation between fractal worth and fracture energy.
The mechanisms of fluid-assisting rock fracture is divided into outburst fracturing 、fluid-chemical fracturing and hydraulic fracturing,,etc.The worth size of fractal follows generally Principle that outburst fracturing is larger than fluid-chemical fracturing and fluid-chemical fracturing is larger than hydraulic fracturing.Fractal statistical computation is given to the breccias associated with the ore body II,typical ore body in the Fenghuangshan deposit.It is judged that rock fracture results from the hydraulic fracture mechanism and there is a positive related relation between fractal worth and fracture energy.
引文
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[3]高峰,赵鹏.岩石破碎程度的分形度量.力学与实践.1994,16(2):16~17.
[4]朱志澄、宋鸿林.构造地质学.武汉:中国地质大学出版社,1990.50~54.
[5]李明诚.石油与天然气运移.北京:石油工业出版社,1987,11~13.
[6]Burnham C W.Energy realease in subvolcan ic environm ents:im-plications for breccia formation.Econ Geol,1985,80:1515~1522.
[7]S illitoe R H.O re-related breccias in volcanopluton ic areas.EconGeol.1985,80:1467~1514.
[8]M eere P A.H igh and low density flu id in a quarts vein from the I-rish Variscides.J Struct Geol.1995,17(3):435~446.
[9]Tom G.Cataclasis and Processes of Particle S ize Reduction.PA-GEOPH,1996,136:136~151.
[10]Jébrak M.Hythermal breccias in vein-type ore depoits:A re-view ofm echan ism,morphology and size d istribution O re GeologyReviews.1997,12:111~134.
[11]Lorilleux G,Jebrak M,Cuney M Baudemont.Polyphase hydro-thermal breccias associated w ith uncom form ity-related uran iumm ineralization(Canada):from fractal analysis to structural sign ifi-cance.Journal of Structural Geology,2002,24:324~338.
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