北京昌平南口地区地质新认识
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摘要
北京南口地区,水文地质钻探揭露地层与设计地层有着较大出入。本文通过CG-T-1、CG-K-1、CG-K-2孔的钻探施工,对比分析区域地质资料,总结了南口—孙河断裂两侧第四系、白垩系和侏罗系的分布埋深情况,重新认识了燕山期侵入岩体的分布范围,认为在南口—孙河断裂的上盘(西南盘)区域分布着较厚的燕山期侵入岩体,蓟县系雾迷山组比以前设计的埋深要深得多,得出在辛店—马池口凹陷平原区内布置基岩供水井适宜性较差的结论。通过对CG-K-2号井热盖层、热储层及导热构造的分析,对比CG-K-2井的测井温度,提出了开发地热资源的建议。
In the Nankou area of Beijing, hydrogeological drilling has revealed a large discrepancy between actual strata and previously thought strata. Through the drilling construction of CG-T-1, CG-K-1 and CG-K-2 wells, this paper comparatively analyzes the regional geological data and refers to the past geological reports and papers about the Nankou area, summaries the distribution and burial depths of Quaternary, Cretaceous and Jurassic Systems on both sides of the Nankou-Sunhe fault, and re-recognizes the disintegration extent and range of Yanshanian intrusive rock. It considers that in the area of the upper plate(southwest plate) of the Nankou-Sunhe fault, The Yanshanian intrusive rock's thickness is big, and the Wumishan Formation in the Jixian System is much deeper than the previous design. The conclusion is that the suitability of the bedrock water supply well in the plain area of Xindian-Macikou depression is poor. Based on the discussion of the thermal caprock, thermal reservoir and thermal conductivity structure of CG-K-2 well and the logging temperature of CG-K-2 well, and proposals are made for the development of geothermal resources in this area.
In the Nankou area of Beijing, hydrogeological drilling has revealed a large discrepancy between actual strata and previously thought strata. Through the drilling construction of CG-T-1, CG-K-1 and CG-K-2 wells, this paper comparatively analyzes the regional geological data and refers to the past geological reports and papers about the Nankou area, summaries the distribution and burial depths of Quaternary, Cretaceous and Jurassic Systems on both sides of the Nankou-Sunhe fault, and re-recognizes the disintegration extent and range of Yanshanian intrusive rock. It considers that in the area of the upper plate(southwest plate) of the Nankou-Sunhe fault, The Yanshanian intrusive rock's thickness is big, and the Wumishan Formation in the Jixian System is much deeper than the previous design. The conclusion is that the suitability of the bedrock water supply well in the plain area of Xindian-Macikou depression is poor. Based on the discussion of the thermal caprock, thermal reservoir and thermal conductivity structure of CG-K-2 well and the logging temperature of CG-K-2 well, and proposals are made for the development of geothermal resources in this area.
引文
柯柏林,2009.北京市平原区北部孙河断裂的地热地质特征[J].现代地质,23(1):43-48.
吕金波,车用太,王继明,等,2006.京北地区热水水文地球化学特征与地热系统的成因模式[J].地震地质,(3):419-429.
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张道富,张进平,2002.北京市小汤山地热田中部及城区地热田地温场与地质构造的关系[C]//北京市国土资源和房屋管理局、北京市地质矿产勘查开发局.北京地热国际研讨会论文集.
张世民,王丹丹,刘旭东,等,2007.北京南口-孙河断裂带北段晚第四纪活动的层序地层学研究[J].地震地质,29(4):729-743.
吕金波,车用太,王继明,等,2006.京北地区热水水文地球化学特征与地热系统的成因模式[J].地震地质,(3):419-429.
王泽龙,吕金波,周训,2007.北京市小汤山地区地温场特征及地下热水成因模式分析[C]//中国能源研究会地热专业委员会.中国地热资源开发与保护-全国地热资源开发利用与保护考察研讨会论文集.
张道富,张进平,2002.北京市小汤山地热田中部及城区地热田地温场与地质构造的关系[C]//北京市国土资源和房屋管理局、北京市地质矿产勘查开发局.北京地热国际研讨会论文集.
张世民,王丹丹,刘旭东,等,2007.北京南口-孙河断裂带北段晚第四纪活动的层序地层学研究[J].地震地质,29(4):729-743.