吉林磐石官马溶洞的洞穴特征及形成时代初探  

Characteristics and forming age of Guanma Cave in Panshi of Jilin

作　　者：沙旭光[1] 程新民[1] 孙忠实[1] 常建平[1] 刘丽娟[1] 

机构地区：[1]吉林大学地球科学学院,吉林长春130061

出　　处：《世界地质》2006年第3期270-274,共5页World Geology

摘　　要：吉林磐石官马溶洞发育在上石炭统石嘴子组厚层大理岩化石灰岩中,主要受北西向断层控制,发育有高度不同的5层洞穴。洞内化学沉积物多为重力水沉积,非重力水沉积物在洞中沉积稀少。溶洞内空气与洞外大气交换作用较强,具有良好的环境质量。通过与洞外饮马河河流阶地在高程及形成时代上的对比研究,结合在溶洞第4层采取年龄样的铀系法测年数据(30.6±2.3kaBP),初步推测官马溶洞发育起于早更新世。Guanma Cave developed in thick-beded marbeiged limestone of the Upper Carboniferous Shizuizi Formation in Panshi of Jilin, presenting in 5 different levels in altitudes, and was controlled mainly by NW fracture. The speleothems inside the cave are attributed to gravitational water forms, while infreguently by nongravitational water. The Guanma Cave is preferable in ventilation and good in surroundings. Comparing the five caves with the terraces sidewise the Yinma River in forming age, combined wilh the dating of the samples in the fourth layer of the cave （30.6＋2.3 ka BP）, the authors estimate that the Guanma Cave originated in the Early Pleistocene.

关 键 词：官马溶洞 洞穴特征 河流阶地 形成时代 

分 类 号：P642.25[天文地球—工程地质学]