摘要
塔里木盆地塔中北部中下奥陶统鹰山组中白云岩和白云石化作用相当普遍,由台地相多种白云岩、灰质白云岩、白云质灰岩和灰岩的不等厚互层组成。其中的白云岩主要包括结晶白云岩、残余颗粒白云岩、残余灰质白云岩和隐藻白云岩等类型。通过对这些白云岩的产状、岩矿和地球化学等特征的分析,认为本区鹰山组白云岩以近地表蒸发海水交代成因为主,可以用潮坪环境蒸发白云石化作用模式和回流渗透白云石云化作用模式来解释。
There are large amount of dolostone and wide spread dolomization in Yingshan Formation of Lower and Middle Ordovician in North of central Tarim basin,the strata is composed of all kinds of dolostone, limy dolostone, dolomited limestone and limestone which are inter-bedded with different thickness and deposited on carbonate platform. The dolostone includes sparry dolostone, residual-grained dolostone, residual limy dolostone and algae dolostone. By analyzing the attitude, minerlogy and geochemistry of the dolostone, the origin of dolostone is regarded as a kind of replaced one at near-surface in evaporated sea water which can be interpreted in such model as tidal evaporating dolomite-forming and flowing-down dolomite-forming.
出处
《西南石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第1期34-36,共3页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
中国石油天然气集团公司石油科技中青年创新基金项目(06E1018)
关键词
白云岩
成因
奥陶系
鹰山组
塔里木盆地
dolostone
origin
ordovician
Yingshan Formation, Tarim basin
