海底蚀变玄武岩中次生组分去除实验研究  

Leaching Experiments of Secondary Components in Altered Submarine Basalts

作　　者：卜文瑞[1] 李力[1] 朱爱美[1] 张辉[1] 张俊[1] 崔菁菁[1] 

机构地区：[1]国家海洋局第一海洋研究所海洋沉积与环境地质国家海洋局重点实验室,山东青岛266061

出　　处：《地球科学进展》2012年第10期1167-1172,共6页Advances in Earth Science

基　　金：国家海洋局第一海洋研究所基本科研业务费专项资金项目"海底玄武岩次生碳酸盐去除实验研究"(编号:2007G22);国际海底区域研究开发"十一五"项目"海底多金属成矿系统及矿集区初步研究"(编号:DYXM-115-01-2-1)资助

摘　　要：选择有大量次生方解石沉淀的海底蚀变玄武岩为研究对象,研磨、均一化后将粉末样品分为49份,其中48份分别以0.25,0.5,1.0,1.5,2.0,2.5 mol/L 6种浓度的足量HCl溶解0.5,1,2,4,8,16,32,64 h,选取溶解残渣测定其主要氧化物和特征微量元素含量,研究确定HCl溶解法去除海底玄武岩中次生组分的浓度—时间组合。结果表明,1.0 mol/L-0.5 h,1.0 mol/L-1 h,1.0 mol/L-2 h,1.0 mol/L-4 h,1.5 mol/L-0.5 h,1.5 mol/L-1 h,2.0 mol/L-0.5 h,2.0 mol/L-1 h和2.5 mol/L-0.5 h等9种HCl浓度—时间组合是可供去除海底蚀变玄武岩中次生碳酸盐的理想方案。Altered submarine basalts with rich secondary calcites were graded,homogenized,and divided into 49 subsamples.48 subsamples were leached with hydrochloric acid（HCl） of different concentrations（0.25 mol/L,0.5 mol/L,1.0 mol/L,1.5 mol/L,2.0 mol/L,2.5 mol/L） for different time periods（0.5 hour,1 hour,2 hours,4 hours,16 hours,32 hours and 64 hours）.The main oxides and trace elements in the leached residuals were analyzed to determine the preferred HCl concentration-time combinations for leaching secondary components in altered submarine basalts.The result indicates that there are 9 optimal schemes as preferred HCl concentration-time combinations to leach secondary components in altered submarine basalts,which are 1.0 mol/L-0.5 hours,1.0 mol/L-1 hour,1.0 mol/L-2 hours,1.0 mol/L-4 hours,1.5 mol/L-0.5 hours,1.5 mol/L-1 hour,2.0 mol/L-0.5 hours,2.0 mol/L-1 hour and 2.5 mol/L-0.5 hour.

关 键 词：蚀变玄武岩 次生组分 去除实验 

分 类 号：P594.2[天文地球—地球化学] P736.3[天文地球—地质学]