一海相碳酸盐鲕粒形成过程的模拟实验研究-中国石油大学学报.PDF

2017年摇 第41卷摇 摇 摇 摇 摇 摇 中国石油大学学报(自然科学版)摇 摇 摇 摇 摇 摇 摇 摇 Vol.41摇 No.3 摇 第3期摇 摇 摇 摇 摇 摇 摇 摇 Journal of China University of Petroleum摇 摇 摇 摇 摇 摇 摇 摇 Jun.2017 摇 摇 文章编号:1673鄄5005(2017)03鄄0023鄄08摇 摇 摇 doi:10.3969/ j.issn.1673鄄5005.2017.03.003 一海相碳酸盐鲕粒形成过程的模拟实验研究 周瑶琪,张摇 晗,张振凯 (中国石油大学地球科学与技术学院,山东青岛266580) 摘要:通过实验室模拟沉积环境的方法对鲕粒进行人工合成,探索鲕粒的形成过程及影响鲕粒形成的环境条件,实 验的主要参数有体系中的藻类、体系的水动力和晶核数量。 结果表明:静水条件及藻类活跃的人造海水中鲕粒的圈 层结构及表面结晶程度发育最好,说明较弱的水动力及藻类的生物作用有助于鲕粒的生长;体系中碳酸钙晶核的数 量是鲕粒能否形成的决定因素。 根据晶核数量及反应活化能的不同,对海相碳酸盐鲕粒及泥晶灰岩的形成过程进 行动力学分析。 关键词:鲕粒;藻类;水动力;晶核 中图分类号:P736.21摇 摇 摇 文献标志码:A 引用格式:周瑶琪,张晗,张振凯.海相碳酸盐鲕粒形成过程的模拟实验研究[J]. 中国石油大学学报(自然科学版), 2017,41(3):23鄄30. ZHOU Yaoqi,ZHANG Han,ZHANGZhenkai. Experiment study of synthesisfor marine carbonate ooids genesis[J]. Jour鄄 nal of China University of Petroleum(Edition of Natural Science),2017,41(3):23鄄30. Experiment study of synthesis for marine carbonate ooids genesis ZHOU Yaoqi,ZHANG Han,ZHANGZhenkai (School of geosciences in China University of Petroleum,Qingdao2266580,China) Abstract:The ooidswere synthesizedusingthelaboratory simulationof sedimentary environment,throughwhichtheprocess of the ooidsformation and the environmental factors of influencing the ooids formation were studied. Three parameters were considered in the experiment,which are algae type,water agitation,and nucleus amount. It isfoundthat synthesized ooids tend tohavethebestconcentricstructureandthemostcompactsurfaceunderhydrostaticconditionandthepresenceofalgae, indicating that quitewater and the biological effect of alga are favorable conditions for ooid growth. The number of calcium carbonatecrystal nucleusisalsoadecisivefactorfortheooidsformation. Basedonthedifferenceof nucleusquantity andac鄄 tivation energy,a kinetic study of th