巢北栖霞灰岩中的脆韧性剪切构造的研究
基金项目:

国家自然科学基金项目《烃源灰岩在超浅层剪切过程中的物理化学响应》(项目编号:40272082)及973项目《构造作用与裂缝体系结构特征研究》(项目编号:2006cb202401)部分成果


Study on the Brittle-Ductile Shearing Zones in the Qixia Limestone in Northern Chaohu
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    摘要:

    安徽巢北二叠纪的栖霞灰岩中发育了多条小型剪切带。剪切带的宽度介于数十厘米到1米之间,顺层分布。剪切带强烈部位发育了大量方解石脉、强烈片理化及发育了大量斜歪褶皱。在剪切带中脆韧性剪切构造非常发育,主要有各类剪切面理、S-C组构、线理、斜歪褶皱、眼球构造、柱状构造及其他多种显微剪切构造,其中部分未见有报道。研究表明,巢北二叠纪的栖霞灰岩中剪切带中脆韧性剪切构造是在3000米左右深的超浅层发育的,最大深度不超过5500米。地下流体、尤其是有机质成熟过程中排放的有机酸形流体促进了方解石在超浅层条件下发生脆韧性变形。

    Abstract:

    There are several small brittle-ductile sheared zones developed in the in the Permian Qixia limestone in northern Chaohu, which’s width is ranged from a few decades to slightly more than one meter and distributed along the strata bedding. A lot of calcite veins, foliation and sheared flanking folds develop in the violently shear parts. brittle-ductile shearing structures in the sheared zones are extreamly common, such as sheared foliation, S-C fabric, lineation, flanking folds, eye-ball structure, column structure and many other micro sheared structures which of them have not been dealed with up to now. The study reveals that the brittle-ductile shearing zones in the Qixia limestone in northern Chaohu are formed in about 3000 meter depth below the surface and at most less than 5500meters. The underground liquid, expecialy organic acid extrauted by organic matter during its maturation is benefited to the calcite brittle-ductile sheared deformation in the super shallow comdition.

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钟建华,王德金,戴跃进,王海侨,王志坤.2009.巢北栖霞灰岩中的脆韧性剪切构造的研究[J].地质学报,83(2):176-195.
Zhong Jianhua,-,-,-,-.2009. Study on the Brittle-Ductile Shearing Zones in the Qixia Limestone in Northern Chaohu[J]. Acta Geologica Sinica,83(2):176-195.

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历史
  • 收稿日期:2008-07-26
  • 最后修改日期:2008-07-28
  • 录用日期:2008-07-28
  • 在线发布日期: 2009-04-14