| 吉林省晚古生代造山带二叠纪移置地体及古地理原型 |
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| 引用本文： | 文琼英,张川波,汪筱林,刘爱杨,宝忠.吉林省晚古生代造山带二叠纪移置地体及古地理原型[J].吉林大学学报(地球科学版),1996(3). |
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| 作者姓名： | 文琼英 张川波 汪筱林 刘爱杨 宝忠 |
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| 作者单位： | 长春地质学院，吉林省地矿局区调队 |
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| 摘 要： | 吉林省晚古生代造山带是西伯利亚板块与中朝板块离散、聚敛后褶皱造山带的一部分，又处于与滨太平洋构造域的复合部位，地质构造极为复杂。现存的岩石—地层体乃是经历多次构造运动移置、改造的结果。以生物地层学、沉积地质学为基础，综合应用构造学及地球化学理论和方法，详细地研究此造山带的生物地理区、岩相古地理、岩石化学和古地磁学等内容，首先发现在二叠纪时有四个移置地体组成，即延边、吉中、松辽和白城。根据生物古地理特征、物质成分判别及其沉积序列，确定各地体的古纬度和古构造环境，结合地球动力学分析，再造构造古地理原型，乃是一个活动大陆边缘的复合边缘海盆。
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| 关 键 词： | 晚古生代 造山带 二叠纪 移置地体构造 古地理原型 |
THE FORMATION AND EVOLUTION OF CORDIERITE IN THE GNEISS FORM THE QIANLISHAN GROUP,INNER MONGOLIA,CHINA |
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| Wang Wei,Ye Huiwen,He Gaopin.THE FORMATION AND EVOLUTION OF CORDIERITE IN THE GNEISS FORM THE QIANLISHAN GROUP,INNER MONGOLIA,CHINA[J].Journal of Jilin Unviersity:Earth Science Edition,1996(3). |
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| Authors: | Wang Wei Ye Huiwen He Gaopin |
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| Abstract: | In the gneiss of Qianlishan group, Inner Mongolia, the cordierite is comparatively rich. Most of them grow (distribute) around the garnet, while enclosing the sillimanite. Such a structure shows that the cordierite is formed by the reactions between the garnet and the sillimanite. Because of the addition influx of potassinm, silicon and fluid associated with the syntectonic granites, the cordierite in the gneiss is trans formed into sericite, instead of talc and serpentine. This transformed cordierite often remain in shape of isolated island, and are rich in potassium. Parts of them and the sericite are alternative zonal, and there is a transitional form in chemical composition of cordierite and sericite. |
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| Keywords: | cordierite sericite Inner Mongolia Qianlishan group |
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