| 新疆哈密黄山韧性挤压带超塑性拉伸砾石的特征及形成机制 |
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| 引用本文：徐兴旺,马天林,孙立茜,李贵书.1996.新疆哈密黄山韧性挤压带超塑性拉伸砾石的特征及形成机制[J].地球学报,17(3):276-281. |
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| 基金项目:国家305项目 |
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| 中文摘要:新疆哈密黄山韧性挤压带变形砾石具超塑性拉伸的特征，变形砾石平均棉球体长短轴比（Ｘ／Ｚ）大于１０．变形砾石的微观构造、超微观构造、石英组构、及变形砾石拉伸量与砾内石英颗粒轴比（Ｘ／Ｚ）和砾内面理间隔（Ｄ）关系等的综合研究表明，挤压及其所导致的砾内矿物的细粒化和拉伸及砾内面理间隔的减小是砾石超塑性拉伸的重要变形机制。变形砾石粒度大小和岩性对砾石拉伸变形具一定的敏感性。另外，随着拉伸应变量的增大，硅质岩砾石石英组构有从Ｖ型极密、小圆环带、交叉环带向Ⅷ型极富和Ⅰ型极密演化的特征。 |
| 中文关键词:韧性挤压带 砾石 超塑性拉伸形成机制 新疆 哈密 黄山 |
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| Characteristics and Formational Mechanism of Superplastic Stretching Pebbles in Huangshan Ductile Compressing Zone in Hami Area,Xingjiang |
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| Abstract:Deformed pebbles in Huangshan ductile compressing zone in Hami area, Xingjiang show characteristics of superplastic stretching, axial ratios of maxium axis to minium axis (X/Z) of average deformed ellipsoid pebbles being more than ten. Such datas as microstructure and supermicrostructure of deformed pebbles, quartz fabric relationship among stretching strain value of deformed pebbles and axial ratios of quartz and interval between inner foliation, reveal that compression and its result in grannulation and stretching of mineral and reduce of interval between in-' ner foliation within pebble may be the operative deformational mechanism of superplastic stretching of pebbles Gran size and rock type of deformed pebble have certain sensibility to stretching deformation. In addition, while stretching strain value increases, quartz fabric of siliceous pabbles evolues from type V maxium small-circle girdle and crossed girdle to type Ⅷ and type Ⅰ maxium. |
| keywords:ductile compressing zone pebble superplastic stretching formational mechanism Huangshan in Hami |
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