山东平邑盆地古近系卞桥组一段湖相碳酸盐岩碳氧同位素特征及其地质意义
P588.24+5%P597+.2; 对山东平邑盆地柏林剖面古近系卞桥组一段1 9 件湖相碳酸盐岩样品的岩性特征、碳氧同位素特征、主量和微量元素进行了分析.结果表明:平邑盆地古近系卞桥组一段的岩性从地层底部到顶部整体变化依次为粗碎屑岩、核形石灰岩、生物碎屑灰岩、颗粒灰岩、泥晶灰岩/泥灰岩.碳酸盐岩δ13C值主要为-3.5‰~-2.5‰,平均值为-2.9‰;δ18O 值主要为-8.5‰~-6.5‰,平均值为-7 .6‰;碳氧同位素具有良好的相关性,说明平邑盆地在古近系沉积时期是水体停留时间较长的封闭性湖泊系统.碳酸盐岩Sr/Ba 值主要为0.25~31.55,可以认为平邑盆地古近系沉积时期水介质...
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Published in | 地球科学与环境学报 Vol. 42; no. 3; pp. 342 - 354 |
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Main Authors | , |
Format | Journal Article |
Language | Chinese |
Published |
中国地质大学(北京)能源学院,北京 100083
01.05.2020
中国地质大学(北京)海相储层演化与油气富集机理教育部重点实验室,北京 100083 |
Subjects | |
Online Access | Get full text |
ISSN | 1672-6561 |
DOI | 10.19814/j.jese.2019.12030 |
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Abstract | P588.24+5%P597+.2; 对山东平邑盆地柏林剖面古近系卞桥组一段1 9 件湖相碳酸盐岩样品的岩性特征、碳氧同位素特征、主量和微量元素进行了分析.结果表明:平邑盆地古近系卞桥组一段的岩性从地层底部到顶部整体变化依次为粗碎屑岩、核形石灰岩、生物碎屑灰岩、颗粒灰岩、泥晶灰岩/泥灰岩.碳酸盐岩δ13C值主要为-3.5‰~-2.5‰,平均值为-2.9‰;δ18O 值主要为-8.5‰~-6.5‰,平均值为-7 .6‰;碳氧同位素具有良好的相关性,说明平邑盆地在古近系沉积时期是水体停留时间较长的封闭性湖泊系统.碳酸盐岩Sr/Ba 值主要为0.25~31.55,可以认为平邑盆地古近系沉积时期水介质主要为咸水环境;Mg/Ca值主要为0.004 2~0.011 9,结合氧同位素组成,反映平邑盆地古近系沉积时期的古气候变化经历了潮湿环境→半干热环境→干热环境3 个阶段.根据岩性序列垂向演化及薄片特征,可以推断出平邑盆地在古近系卞桥组一段沉积时期,湖盆水动力随着地层变新而减弱,湖盆水体逐渐由高能转入低能环境. |
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AbstractList | P588.24+5%P597+.2; 对山东平邑盆地柏林剖面古近系卞桥组一段1 9 件湖相碳酸盐岩样品的岩性特征、碳氧同位素特征、主量和微量元素进行了分析.结果表明:平邑盆地古近系卞桥组一段的岩性从地层底部到顶部整体变化依次为粗碎屑岩、核形石灰岩、生物碎屑灰岩、颗粒灰岩、泥晶灰岩/泥灰岩.碳酸盐岩δ13C值主要为-3.5‰~-2.5‰,平均值为-2.9‰;δ18O 值主要为-8.5‰~-6.5‰,平均值为-7 .6‰;碳氧同位素具有良好的相关性,说明平邑盆地在古近系沉积时期是水体停留时间较长的封闭性湖泊系统.碳酸盐岩Sr/Ba 值主要为0.25~31.55,可以认为平邑盆地古近系沉积时期水介质主要为咸水环境;Mg/Ca值主要为0.004 2~0.011 9,结合氧同位素组成,反映平邑盆地古近系沉积时期的古气候变化经历了潮湿环境→半干热环境→干热环境3 个阶段.根据岩性序列垂向演化及薄片特征,可以推断出平邑盆地在古近系卞桥组一段沉积时期,湖盆水动力随着地层变新而减弱,湖盆水体逐渐由高能转入低能环境. |
Author | 黄文辉 贾瑜 |
AuthorAffiliation | 中国地质大学(北京)海相储层演化与油气富集机理教育部重点实验室,北京 100083;中国地质大学(北京)能源学院,北京 100083 |
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Author_FL | JIA Yu HUANG Wen-hui |
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DocumentTitle_FL | Carbon and Oxygen Isotopic Characteristics of Lacustrine Carbonate Rocks from the First Member of Paleogene Bianqiao Formation in Pingyi Basin of Shandong,China and Their Geological Significance |
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Keywords | 湖相碳酸盐岩 山东 古气候 古近系 地球化学 古盐度 碳氧同位素 卞桥组 |
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Title | 山东平邑盆地古近系卞桥组一段湖相碳酸盐岩碳氧同位素特征及其地质意义 |
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