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.
出处
《地球科学进展》
CAS
CSCD
北大核心
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
关键词
蚀变玄武岩
次生组分
去除实验
Altered submarine basalts
Secondary components
Leaching experiments.
