北京平原区地质剖面的初步建立——太古宙结晶基底和元古宙地层
Primary establishment of stratigraphic section in plain area of Beijing: Archean crystalline basement and Proterozoic strata
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摘要: 北京平原目前尚未建立系统的地质剖面。1867年庞培莱将北京西山分为3大系,1871年李希霍芬提出震旦系、划分12层。1922年葛利普将震旦系限定在前寒武系,1923年田奇镌将南口剖面划分为7个岩组,1934年高振西将震旦系3分(南口群、蓟县群、青白口群)。1976年乔秀夫3分青白口群(下马岭组、龙山组和景儿峪组),1980年汪长庆等将十三陵剖面分为4系12组,1991版《北京市区域地质志》将十三陵剖面分为3系12组。本文初步建立平原区地层表,详细描述太古宙结晶基底和元古宙地层剖面,在京南大兴区的榆垡(兴热-1井)和安定(兴热-2井)发现太古宙片麻岩,在京热-70井、京热-59井、京热-71井和京热-75井编录蓟县纪地层,利用亦庄小学钻孔厘定待建系下马岭组、青白口纪龙山组和景儿峪组。Abstract: Systematical geological section has not been established in Beijing plain area. Western Hills of Beijing were divided into 3 systems by R. Pumpelly in 1867 and 12 layers by F. V. Richthofen in 1871. The Sinian strata were limited to pre-Cambrian by A. W. Grabau in 1922. The Nankou geological section was divided into 7 formations by Tian Qi-juan in 1923. The Sinian strata were divided into 3 groups which were Nankou Group, Jixian Group and Qingbaikou Group by Gao Zhen-xi in 1934. The Qingbaikou Group was divided into 3 formations of Xiamaling Formation, Longshan Formation and Jingeryu Frmation by Qiao Xiu-fu in 1976. The Ming Tombs geological section was divided into 4 systems and 12 formations by Wang Chang- qing in 1980. In 1991, ‘Regional Geology of Beijing Municipality'divided Ming Tombs into 3 systems and 12 formations. This paper established a stratigraphic table in Beijing plain area and detailed Archean gneiss and Proterozoic strata. The Archean gneiss was discovered in Yufa"Xingre-1 Well"and Anding"Xingre-2 Well". The Jixian system from Jingre-70 Well, Jingre-59 Well, Jingre-71 Well and Jingre- 75 Well was cataloged. The Xiamaling Formation to be established and Longshan Formation and Jingeryu Formation of Qingbaikou system were also cataloged at Yizhuang Primary School of South Beijing.
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Key words:
- geological section /
- Archean gneiss /
- Proterozoic strata /
- plain area of Beijing
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