| 川东北须家河组中铝土矿的发育特征及其对构造活动的响应 |
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| 引用本文： | 林良彪,陈彦庆,淡永,钟怡江,徐胜林.川东北须家河组中铝土矿的发育特征及其对构造活动的响应[J].岩石学报,2011,27(8):2392-2402. |
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| 作者姓名： | 林良彪 陈彦庆 淡永 钟怡江 徐胜林 |
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| 作者单位： | 油气藏地质及开发工程国家重点实验室,成都理工大学,成都 610059;成都理工大学沉积地质研究院,成都 610059;油气藏地质及开发工程国家重点实验室,成都理工大学,成都 610059;成都理工大学沉积地质研究院,成都 610059;油气藏地质及开发工程国家重点实验室,成都理工大学,成都 610059;成都理工大学沉积地质研究院,成都 610059;油气藏地质及开发工程国家重点实验室,成都理工大学,成都 610059;成都理工大学沉积地质研究院,成都 610059;油气藏地质及开发工程国家重点实验室,成都理工大学,成都 610059;成都理工大学沉积地质研究院,成都 610059 |
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| 基金项目： | 本文受国家自然科学基金重点项目(40739901)、四川省科技厅基础研究项目(2010JY0031)、 四川省教育厅自然科学青年基金(09ZB006)和四川省重点学科"构造地质学"建设基金项目(SZD0408)联合资助. |
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| 摘 要： | 四川盆地晚三叠世诺里期与瑞替期(须三段与须四段)之间是否存在安县运动以及该运动的影响范围有多大,一直存在分歧。本次研究首次在川东北须家河组三段上部(即须三段与须四段之间)发现了沉积型铝土矿层的存在。通过镜下观察,地化、电子探针、扫描电镜以及X射线等分析,认为:铝土矿以豆粒状产出状态为主,具豆粒结构、块状构造,豆粒间填隙物以灰、灰黑色胶状、蠕虫状高岭石为主,其次为褐铁矿染的干净明亮的放射状、球粒状菱铁矿,偶见闪锌矿;豆状铝土矿主要呈微-细晶粒状、鳞片状及絮状,其中,晶粒状、鳞片状铝土矿单偏光镜下无色、正中突起,解理明显,正交偏光镜下呈二级兰干涉色,结合X射线分析,将其定名为一水硬铝石,其Al2O3含量为85.022%~87.763%;测井曲线上,自然伽玛异常增大,当密度接近于3g?cm-3时,中子孔隙度值出现相对高值。表明须三段与须四段之间存在一次时间较长的沉积间断,佐证了安县运动的存在,同时也表明安县运动影响范围已远远超出了龙门山前缘地区,进入了盆地内部,甚至影响了整个四川盆地。
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| 关 键 词： | 铝土矿 安县运动 须家河组 川东北 |
| 收稿时间： | 2/3/2011 12:00:00 AM |
| 修稿时间： | 2011/6/22 0:00:00 |
Development characteristics of the Xujiahe Formation bauxite in the northeast of Sichuan basin and its response to structural movement |
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| LIN LiangBiao,CHEN YanQing,DAN Yong,ZHONG YiJiang and XU ShengLin.Development characteristics of the Xujiahe Formation bauxite in the northeast of Sichuan basin and its response to structural movement[J].Acta Petrologica Sinica,2011,27(8):2392-2402. |
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| Authors: | LIN LiangBiao CHEN YanQing DAN Yong ZHONG YiJiang and XU ShengLin |
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| Institution: | State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, CDUT, Chengdu 610059, China;Institute of Sedimentary Geology, CDUT, Chengdu 610059, China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, CDUT, Chengdu 610059, China;Institute of Sedimentary Geology, CDUT, Chengdu 610059, China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, CDUT, Chengdu 610059, China;Institute of Sedimentary Geology, CDUT, Chengdu 610059, China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, CDUT, Chengdu 610059, China;Institute of Sedimentary Geology, CDUT, Chengdu 610059, China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, CDUT, Chengdu 610059, China;Institute of Sedimentary Geology, CDUT, Chengdu 610059, China |
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| Abstract: | Arguments on whether An'xian tectonic movement existed or not and on how widely its influence might range during Norian Period and Rhaetian Period of Late Triassic(between the 3rd and 4th member of Xujiahe Formation) in Sichuan basin have existed for long time.This study,for the first time,found the sedimentary bauxite layer on the top of the 3rd member of Xujiahe Formation(between the 3rd and 4th member of Xujiahe Formation) in the northeast of Sichuan basin.On the basis of thin section,geochemical charact... |
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| Keywords: | Bauxite An'xian tectonic movement Xujiahe Formation Northeast of Sichuan basin |
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