古沉积期钙质夹层成因及其过程分析（英文）  

Causes and Process Analysis of Calcareous Interbeds in Paleo-sedimentary Period

作　　者：单敬福[1] 闫海利 赵忠军[2,3] 李浮萍[2,3] 高怀玺 

机构地区：[1]长江大学油气资源与勘探技术教育部重点实验室,武汉430100 [2]中国石油长庆油田分公司苏里格气田研究中心 [3]低渗透油气田勘探开发国家工程实验室,西安710018 [4]辽河油田兴隆台采油厂地质研究所,盘锦124010

出　　处：《科学技术与工程》2015年第21期81-86,100,共7页Science Technology and Engineering

基　　金：国家自然科学基金(41372125);湖北省教育厅基金(Q20121210);中国地质大学(武汉)构造与油气资源教育部重点实验室开放基金(TPR-2012-23)资助

摘　　要：在古沉积地表环境中,钙的富集一般以成片、板状等形式产出,通过物理化学分析手段,指出Ca2+离子的来源,Ca2+离子富集条件及钙积层形成机理及其主控因素。研究结果表明,Ca2+离子从硅铝酸盐矿物颗粒中分离出来,与大气酸性水的存在密不可分,湖平面的持续下降,气候干旱,蒸发量大于降水量,河道频繁迁移摆动,河湖过渡处水流不畅等因素,有利于重碳酸钙分解形成碳酸钙沉淀,使钙积层成片、成板状大范围分布。In the paleodepositional surface environments, the enrichment of calcium is generally shown as plate- like and flaky, the origin of the Ca2 ＋ , the conditions of the enrichment of the Ca2 ＋ and the forming mechanism and dominated factors on the caliches were pointed out through physical-chemical study. The results show that the Ca2＋ is dissociated from silicon aluminate particles; they are closely connected with the existence of the atmospheric acidic water. When the climate is dry, with the evaporation larger than that of precipitation, the lake surface keeps decreasing; the river diverting or the transition flow blocked, etc. , which are all beneficial for the decomposition of the heavy calcium carbonate, thus depositing calcium carbonate, making the caliches scattered largely as plate-like and flaky.

关 键 词：钙积层 地下水 大气酸性水 古沉积环境 

分 类 号：P624[天文地球—地质矿产勘探]