| 准噶尔盆地不整合结构模式及半风化岩石的再成岩作用 |
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| 引用本文： | 吴孔友,查明,洪梅.准噶尔盆地不整合结构模式及半风化岩石的再成岩作用[J].大地构造与成矿学,2003,27(3):270-276. |
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| 作者姓名： | 吴孔友 查明 洪梅 |
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| 作者单位： | 石油大学(华东)地球资源与信息学院,山东,东营,257061 |
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| 基金项目： | 国家自然科学基金项目(40102008)，石油大学博士基金项目共同资助. |
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| 摘 要： | 由于风化剥蚀程度的不均一性及后期水进形成上覆岩石使得不整合纵向可分为三层结构:不整合面之上岩石、风化粘土层和半风化岩石。准噶尔盆地不整合面之上岩石类型主要包括底砾岩、水进砂体与煤层,它们的发育受控于构造运动强度、古气候、古地形及暴露时间,其中底砾岩分布最为广泛,而且孔渗性好,构成流体的良好运移通道。风化粘土层在上覆沉积物压实作用下岩性较致密,是一套良好的封盖层。半风化岩石类型有砂质岩类、泥质岩类和火山岩类,它们均能形成风化淋滤带,改善其孔隙结构,增大储集空间,其中火山岩岩溶作用较强,次生孔隙发育带最厚,砂质岩类次之,泥质岩类较差。
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| 关 键 词： | 准噶尔盆地 不整合 结构模式 半风化岩石 再成岩作用 |
| 文章编号： | 1001-1552(2003)03-0270-07 |
| 修稿时间： | 2002年11月12日 |
STRUCTURAL MODELS OF UNCONFORMITY AND RECURRENT DIAGENESIS OF SEMI WEATHERING ROCK IN JUNGGAR BASIN |
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| WU Kong-you,ZHA Ming and HONG Mei.STRUCTURAL MODELS OF UNCONFORMITY AND RECURRENT DIAGENESIS OF SEMI WEATHERING ROCK IN JUNGGAR BASIN[J].Geotectonica et Metallogenia,2003,27(3):270-276. |
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| Authors: | WU Kong-you ZHA Ming and HONG Mei |
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| Abstract: | The structure of unconformity can be divided into three layers:rocks above the unconformity interface,weathering clay and paleokarst zone,according to heterogeneity of erosion and rocks formed by transgressio n.In the Junggar basin the rocks above unconf ormity interface mainly are bottom c onglomerates,transgressive sands and coal beds.Forming of these rocks is contr olled by strength of tectonism,pale oclimate,paleoterrain and exposed periods.The bottom conglomerates o ccur broadly and have better porosit y and permeability,which is a good migrating network for hydrocarbons.Weathering clay is compacted under compressing of upper rocks and constitutes good seals.Semi-weath ering rocks consist of sandstone,mu dstone and volcanic rocks,and they c an form paleokarst zones,improve poro us structure and extend porous volum es.Because karstification is stron ger in volcanic rocks,its secondary porou s zone is the most thick,whereas sand stone is moderate and mudstone is thi n in thickness. |
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| Keywords: | Junggar basin Unconformity Structural model Semi-weathering rock Recurrent diagenesis |
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