川西北地区茅坝组灰岩地质特征及用途探讨  

Geological Characteristics and Application of Limestone of Maoba Formation in Northwest Sichuan

作　　者：刘亮[1] 赖华 杨鹏涛[1] 许涛 胡康强 王超 谭英波 Liu Liang;Lai Hua;Yang Pengtao;Xu Tao;Hu Kangqiang;Wang Chao;Tan Yingbo(Northwest Sichuan Geological Team,Mianyang 621010,China;Mianyang Municipal Bureau of Land and Resources,Mianyang 621010,China)

机构地区：[1]四川省地矿局川西北地质队,四川绵阳621010 [2]绵阳市自然资源局,四川绵阳621010

出　　处：《矿业工程研究》2019年第1期55-61,共7页Mineral Engineering Research

摘　　要：川西北龙门山地区分布有丰富的碳酸盐资源,评价和利用较多的是石炭纪、二叠纪、三叠纪优质水泥用灰岩,而对泥盆系下统茅坝组(D_3m)灰岩的研究评价不足.茅坝组灰岩CaO含量介于52. 97%～54. 78%; MgO含量在0. 28%～1. 64%; SiO_2含量0.33%～1.41%; SO_3含量介于0.01%～0.19%; K_2O+Na_2O为0.036%～0.098%,均达到优质水泥用(Ⅰ级品)要求.经测试,茅坝组灰岩的饱和抗压强度33.4～51.4 MPa;坚固性1%～3%;压碎指标8.8%～10.1%;碱集反应14 d膨胀率为0.009%,放射性总α为3.52×10~2Bq/kg,总β为1.62×10~2Bq/kg.所有指标均符合建筑石料用要求.There are abundant carbonate resources in Longmen Mountains,Northwest Sichuan.Carboniferous,Permian and Triassic limestones are the most widely evaluated and utilized,while the study and evaluation of lower Devonian Maoba Formation(D3m)limestone is insufficient.CaO content of limestone in Maoba Formation ranges from 52.97% to 54.78%.MgO content ranges from 0.28% to 1.64%.SiO2 content ranges from 0.33% to 1.41%.SO3 content ranges from 0.01% to 0.19%.K2O+ Na2O content ranges from 0036% to 0.098%,all meeting the requirements of high-quality cement(GradeⅠ).The test results show that the saturated compressive strength of Maoba Formation limestone is 33.4~51.4 MPa,firmness 1%~3%,crushing index 8.8%~10.1%,expansion rate of alkali-aggregation reaction 14 days is 0.009%,with total radioactive alpha 3.52×10^2 Bq/kg,beta 1.62×10^2 Bq/kg.All indicators meet the requirements of building stone.

关 键 词：川西北 茅坝组灰岩 水泥 建筑石料 

分 类 号：P584[天文地球—岩石学]