天津蓟县长城系串岭沟组混层粘土矿物

陈涛; 王河锦

天津蓟县长城系串岭沟组混层粘土矿物

陈涛^{1, 2,},
王河锦²

1.
中国地质大学珠宝学院，湖北武汉 430074
2.
北京大学地球与空间科学学院，北京 100871

基金项目:

国家自然科学基金面上项目 40702007

中国地质大学(武汉) 第四批优秀青年教师资助计划 CUGQNL0710

详细信息

作者简介:
陈涛(1979-), 女, 博士, 讲师, 主要从事粘土矿物学研究. E-mail: chentao@cug.edu.en

中图分类号: P57
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出版历程
- 收稿日期: 2008-03-05
- 刊出日期: 2008-09-25

Mix-layer Clay Minerals from Chuanlinggou Formation of Changcheng System in Jixian County, Tianjin City

CHEN Tao^{1, 2
,},
WANG He-jin²

1.
Gemmological Inustitute, China University of Geosciences, Wuhan 430074, China
2.
School of Earth and Space Sciences, Peking University, Beijing 100871, China

摘要

摘要: 为了解天津蓟县长城系串岭沟组地层中混层粘土矿物的组成和结构特征, 利用X射线粉晶衍射(XRD) 和高分辨透射电镜(HRTEM) 对其进行了深入研究.通过对比该区粘土矿物的自然干燥片、Ca离子饱和片、Ca饱和的乙二醇膨胀片、加热到375℃和550℃的乙二醇膨胀片获取的XRD衍射峰, 确定该区混层粘土矿物为伊利石/蒙脱石(I/S) 不规则混层矿物和绿泥石/蒙脱石(Chl/S) 不规则混层矿物.从高分辨透射电镜观察到I/S规则及不规则混层的晶格条纹像以及Chl/S不规则混层的晶格条纹像, 揭示了该区I/S混层和Chl/S混层的层间堆跺结构特征.该研究为蓟县中元古界典型剖面提供了重要的混层粘土矿物的结构信息.
- 蓟县 /
- I/S混层 /
- Chl/S混层 /
- XRD衍射峰 /
- 晶格条纹像
Abstract: In order to realize the character of composition and structure of mix-layer clay minerals from Chuanlinggou Formation of Changcheng System in Jixian County, Tianjin City, X-ray powder diffraction (XRD) and high-resolution transmission electron microscope (HRTEM) are used to study the minerals. By contrasting air-dried oriented aggregate sample, Ca cation saturation sample, Ca saturated glycerol salvation sample and heated 375℃ and 550℃ of glycerol salvation samples, it is confirmed that the mix-layer clay minerals from this area is illite/smectite (I/S) order and disorder mix-layer clay minerals and chlorite/smectite (Chl/S) disorder mix-layer clay minerals. The obtained lattice images from high-resolution transmission electron microscope of I/S order and disorder mix-layer minerals and Chl/S disorder mix-layer minerals show the structure character of layer stacking of I/S and Chl/S from this area. This study provides some important structure information of mix-layer clay minerals for the well-known Mesoproterozoic section of Jixian County.
- Jixian County /
- I/S mix-layer clay mineral /
- Chl/S mix-layer clay mineral /
- XRD diffraction patterns /
- lattice finger images

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图 1 样品的各种XRD衍射图谱

绿泥石; S.smectite, 蒙脱石; I.illite, 伊利石; (?).还不能确定粘土矿物组成; A.自然干燥片; Ca.Ca离子饱和片; Ca-EG.Ca饱和的乙二醇膨胀片; 375.加热到375 ℃的乙二醇膨胀片; 550.加热到550 ℃的乙二醇膨胀片; Smectite-EG.乙二醇膨胀蒙脱石

Fig. 1. Different kinds of XRD pattern of the sample Chl.chlorite,

下载: 全尺寸图片幻灯片

图 2 I/S不规则(a) 和不规则(b) 混层粘土矿物的晶格像

Fig. 2. Lattice image of disorder I/S (a) and order I/S (b) mix-layer clay mineral

下载: 全尺寸图片幻灯片

图 3 Chl/S不规则混层粘土矿物的晶格像

Fig. 3. Lattice image of disorder Chl/S mix-layer clay miner

下载: 全尺寸图片幻灯片

表 1 具有混层粘土矿物判断意义的XRD衍射峰及其对应矿物

Table 1. Identification XRD diffraction peaks of mixed-layer clay minerals and their counterpart minerals

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