北京西山大石窝—白带山地区石门背斜构造特征与地质文化

Structural characteristics and geological culture of Shimen Anticline from Dashiwo Village to Baidai Hill in Western Hills,Beijing

以北京西山大石窝镇石门岩体为核部,地层分别向南、北两翼倾斜,形成大石窝—白带山地区的石门背斜。地层从核部向两翼依次出露蓟县系高于庄组、杨庄组和雾迷山组。白垩纪石门岩体的热力变质作用使得雾迷山组一段地层大理岩化。在背斜南翼的辛庄、大石窝、独树村北形成螺丝转、青石、青白、艾叶青和白石大理岩,在下营村西形成纹层状(砖渣)大理岩,成为云居寺刻经石材的主要产地;大石窝村西北王八坑的青石类石材和高庄村西白玉塘的汉白玉大理岩,成为故宫石材的产地。在背斜北翼形成白带山,雾迷山组顶部由西向东形成云居寺石经山藏经洞、上方山云水洞和埋藏古人类化石的田园洞3个岩溶洞穴。

Shimen Anticline layers extend from Dashiwo Village to Baidai Hill.They are made up of Gaoyuzhuang Fm Yangzhuang Fm and Wumishan Fm with the core around Shimen Granitic Pluton.The Wumishan Fm was marbleized due to the thermal effect of Shimen Magma intrusions in the Cretaceous Period.The metamorphic grade becomes deeper and deeper from south to north in the southern limb of the anticline.Accordingly,bluestone and white marble was formed.The mountain with white layers was formed around Baidai Hill of the north limb of the anticline.There are 3 karst caves:Shijingshan Sutra Cave in Yunju Temple,Yunshui Cave in Shangfang Hill and Tianyuan Man Cave from the west to the east of Baidai Hills.