| 海拉尔盆地乌尔逊凹陷片钠铝石及研究意义 |
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| 引用本文： | 高玉巧,刘立,曲希玉.海拉尔盆地乌尔逊凹陷片钠铝石及研究意义[J].地质科技情报,2005,24(2):45-50. |
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| 作者姓名： | 高玉巧 刘立 曲希玉 |
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| 作者单位： | 吉林大学地球科学学院,长春,130061 |
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| 摘 要： | 海拉尔盆地乌尔逊凹陷含片钠铝石砂岩与CO2气井、燕山期花岗岩的分布一致,均产于苏仁诺尔构造带乌西断裂控制的区域.在偏光显微镜和扫描电镜下观察发现片钠铝石的产状有3种:①部分或全部交代长石、石英等碎屑颗粒,多呈长柱状、片板状集合体;②作为胶结物充填于碎屑颗粒间的孔隙中,呈放射状、束状、毛发状、菊花状集合体;③充填在碎屑矿物的溶洞或裂隙中,呈纤维状集合体.含片钠铝石砂岩的成岩共生序次和油气包裹体及现今地层水特征均表明,片钠铝石的生长时间晚于任何其它自生矿物.电子探针及INCA能谱仪分析表明,片钠铝石主要由Na、Al、O、C等组成.研究表明,海拉尔盆地乌尔逊凹陷片钠铝石可作为深部CO2热流体活动的示踪矿物.
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| 关 键 词： | 片钠铝石 形貌 成分 示踪矿物 海拉尔盆地 |
| 文章编号： | 1000-7849(2005)02-0045-06 |
| 修稿时间： | 2005年1月11日 |
Dawsonite from Wuerxun Depression in Halaer Basin and Its Implication |
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| GAO Yu-qiao,LIU Li,QU Xi-yu.Dawsonite from Wuerxun Depression in Halaer Basin and Its Implication[J].Geological Science and Technology Information,2005,24(2):45-50. |
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| Authors: | GAO Yu-qiao LIU Li QU Xi-yu |
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| Abstract: | The sandstones with dawsonite, situated in the area restrained by Wuxi Fault of Surenuoer tectonic zone, associate with carbon dioxide, Yanshanian granite in Wuerxun Depression, Halaer Basin.By means of polarizing light microscope and SEM, three kinds of occurence of dawsonite are divided: 1)as replacement of quartz and feldspar partly or on the whole, like long columnar or foliated aggregation; 2) as cements, filled in the pores among the grains appearing as radial, cluster, hair, chrysanthemum collective;and 3) like fiber filled in dissolved holes or fractures of gains. Dawsonite is found to be formed later than any other minerals according to diagenetic sequences of sandstone, combined with petroleum inclusions and stratum water, and is mainly composed of sodium, aluminum, oxygen and carbon through electron probe and INCA energy spectrometer. The dawsonite from Wuerxun Depression in Halaer Basin can be considered as tracing mineral of thermal fluid activity in the depth. |
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| Keywords: | dawsonite appearance composition tracing mineral Halaer Basin |
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