| 中扬子台地北缘灯影组白云岩研究 |
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| 引用本文： | 翟永红,郭成贤.中扬子台地北缘灯影组白云岩研究[J].矿物岩石,1996,16(3):36-42. |
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| 作者姓名： | 翟永红 郭成贤 |
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| 作者单位： | 江汉石油学院 |
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| 基金项目： | 国家“八·五”攻关项目 |
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| 摘 要： | 研究区白云岩成因类型可划分出准同生白云石化、回流渗透白云石化、混合水白云石化、压溶白云石化和埋藏白云石化。本文详细研了各成因类型的白云岩矿物岩石学特征和地球化学特征，重点探讨了埋藏白云石化Ｍｇ２＋来源及其搬运机理。认为埋藏白云石化Ｍｇ２＋来自粒间残留古海水，迁移机制与地下异常高压孔隙流体的驱动和襄樊－广济同沉积断裂的活动有关。五类白云岩中以混合水白云石化和埋藏白云石化的岩石类型储集性能最好。
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| 关 键 词： | 白云岩 成因 白云石化 震旦纪 中扬子台地 |
STUDY ON DOLOMITES FROM DENGYING FORMATION (SINIAN) AT THE NORTHERN MARGIN OF MIDDLE YANGTZ PLATFORM |
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| Zhai Yonghong, Guo Chengxian, Guo Jianhua, Li Jianming,Hu Mingyi, Tang Zijun.STUDY ON DOLOMITES FROM DENGYING FORMATION (SINIAN) AT THE NORTHERN MARGIN OF MIDDLE YANGTZ PLATFORM[J].Journal of Mineralogy and Petrology,1996,16(3):36-42. |
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| Authors: | Zhai Yonghong Guo Chengxian Guo Jianhua Li Jianming Hu Mingyi Tang Zijun |
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| Abstract: | The origin of dolomited in the study area can be classified into penecontemporaneous dolomitization, seepoge-reflux dolomitization, dorag dolomitization, pressure solution dolomitization and burial dolomitization. Their mineralogic, petrologic and geochemical characteristics are respectively studied in detail, especial focus on the source and migration mechanism of Mg2+ in burial dolomitization.It is concluded that the Mg2+ in burial dolomitization was from the relict intergrain water and its migration was related with the movement of Xiangfan-Guangji Syndepositional fault as well as the impelling of abnormal porous fluid pressure. The dorag dolomite and burinl dolomite are the best reservoir among the five types of dolomites. |
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| Keywords: | origin of dolomite burial dolomitization Sinian middle Yangtz Platform |
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