辽东半岛复州湾十三里台组地球化学特征及沉积环境探讨
- 收稿日期:
1900-01-01
- 修回日期:
1900-01-01
- 刊出日期:
2009-10-10
摘要: 系统测试和研究了辽东半岛复州湾十三里台组常量元素、微量元素和稀土元素地球化学数据，结果表明：Fe2O3/FeO均大于或接近于2，δEu均小于1，Ceanom除一个样品外，均小于0，U/Th比值均小于0.75，V/Cr比值均小于2，Ni/Co比值均小于5，反映强氧化环境，表明十三里台组沉积时水体很浅。其中十三里台组中的泥岩是一种富K、SiO2和LREE的特殊泥岩，为自生独居石的形成提供了充足的物质来源，泥岩的CaO含量极低，小于0.68%，CaO/MgO小于0.6，Sr/Ba小于0.33，反映成岩时盐度十分低，为淡水沉积，沉积环境可能为叠层石礁后的淡水潟湖。从大地构造演化、沉积发展史和稀土元素元素特征分析，十三里台组沉积时的大地构造环境处于Rodinia超大陆形成到裂解之间的稳定时期。
Discussion on Characteristics of GeoChemical and Sedimentary Environments of the Shisanlitai Formation of Fuzhou Bay, Liaoning Province
- Institue of Geology, Chinese Academy of Geological Sciences, Beijing100037
- Received Date:
1900-01-01
- Rev Recd Date:
1900-01-01
- Publish Date:
2009-10-10
Abstract: It is demonstrated by a series of measured data on chemical elements, rare elements and REE elements of the Shisanlitai Formation as follows: Fe2O3/FeO near or more than 2, δEu less than 1, despite one sample of Ceanom less than 0, U/Th ratio less than 0. 75, V/Cr less than 2, Ni/Co less than 5, all of those reflect a high oxidation environment, which is caused by shallow water body of the Shisanlitai Formation. A rich K, SiO2 and REE special mudstone of the Shisanlitai Formation offered plenty of materials for the formation of authegenic monazite. The mudstone contains low CaO less than 0.68%, CaO/MgO less than 0.6, Sr/Ba less than 0.33, which reflect low salinity during diagenetic stage, might be a fresh water lagoon back stromatolite reef environment. The tectonic environment might be a stable stage after Rodinia supper continent crack stage in the Shisanlitai Formation stage.
刘燕学. 辽东半岛复州湾十三里台组地球化学特征及沉积环境探讨[J]. 沉积学报, 2009, 27(5): 1018-1026.
| 引用本文: |
刘燕学. 辽东半岛复州湾十三里台组地球化学特征及沉积环境探讨[J]. 沉积学报, 2009, 27(5): 1018-1026.
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LIU Yanxue. Discussion on Characteristics of GeoChemical and Sedimentary Environments of the Shisanlitai Formation of Fuzhou Bay, Liaoning Province[J]. Acta Sedimentologica Sinica, 2009, 27(5): 1018-1026.
| Citation: |
LIU Yanxue. Discussion on Characteristics of GeoChemical and Sedimentary Environments of the Shisanlitai Formation of Fuzhou Bay, Liaoning Province[J]. Acta Sedimentologica Sinica, 2009, 27(5): 1018-1026.
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