哥伦比亚塞萨尔盆地始新世La Loma组岩石地层分析及沉积模式：探讨CO2储集潜力

IF 1.7 4区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY

Journal of South American Earth Sciences Pub Date : 2025-03-19 DOI:10.1016/j.jsames.2025.105486

Dilan Arturo Martínez-Sánchez , Sait Khurama-Velásquez , Carlos Alberto Ríos-Reyes

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引用次数: 0

摘要

哥伦比亚Cesar-Ranchería盆地在始新世地层学方面存在明显的知识空白，阻碍了对其地质演化和区域相关性的全面认识。本研究主要利用测井资料、岩石学分析和x射线衍射对始新世La Loma组进行表征，以确定其沉积环境和物源。拉洛马组由位于拉洛马向斜中部的砂岩、砾岩和互层粉砂岩组成。100个薄片的岩石学分析确定了两种不同的沉积环境：河流扇和河流体系。桑坦德地块和Serranía de perij被确定为La Loma组沉积物的主要源区。拉洛马组下部沉积贡献主要来自桑坦德地块（东科迪勒拉），表明始新世早期隆升。这一地质事件可能使排水转向下马格达莱纳河谷盆地，并将塞萨尔次盆地与中马格达莱纳河谷盆地连接起来。相反，拉洛马组的上部显示了来自桑坦德地块，Serranía de perij和圣玛尔塔内华达山脉的混合沉积物贡献。这一变化表明始新世期间发生了重大的环境变化和构造重构，影响了中马格达莱纳河谷盆地、下马格达莱纳河谷盆地和塞萨尔次盆地之间的连通性。该岩石地层分析增强了我们对Cesar-Ranchería盆地内拉洛马组在区域地层学和盆地演化中的作用的认识。此外，该研究还探讨了地层的二氧化碳储存潜力，强调了其地质稳定性、充足的孔隙度以及作为天然密封剂的潜力，这对于长期储存二氧化碳和减缓气候变化至关重要。

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Lithostratigraphic analysis of the La Loma Formation and depositional model of the intermontane Cesar Sub-Basin (Colombia) during the Eocene: Exploring potential for CO2 storage

The Cesar-Ranchería Basin in Colombia presents significant knowledge gaps concerning its Eocene stratigraphy, impeding a comprehensive understanding of its geological evolution and regional correlations. This study focuses on characterizing the La Loma Formation (Eocene) using well log data, petrographic analysis, and X-ray diffraction to delineate its depositional environment and sediment provenance. The La Loma Formation comprises sandstones, conglomerates, and interbedded siltstones within the central La Loma syncline. Petrographic analysis of 100 thin sections identifies two distinct sedimentary environments: fluvial fans and a fluvial system. The Santander Massif and Serranía de Perijá are identified as primary source areas for La Loma Formation sediments. In the lower section of the La Loma Formation, sedimentary contributions primarily originated from the Santander Massif (Eastern Cordillera), indicating uplift during the early Eocene. This geological event potentially redirected drainage towards the Lower Magdalena Valley Basin and connected the Cesar Sub-basin with the Middle Magdalena Valley Basin. Conversely, the upper section of the La Loma Formation reveals a mixed sediment contribution from the Santander Massif, Serranía de Perijá, and Sierra Nevada de Santa Marta. This variation suggests significant environmental shifts and tectonic reconfigurations during the Eocene, influencing connectivity between the Middle Magdalena Valley Basin, the Lower Magdalena Valley Basin, and the Cesar Sub-basin. This lithostratigraphic analysis enhances our understanding of the La Loma Formation's role in regional stratigraphy and basin evolution within the Cesar-Ranchería Basin. Moreover, the study explores the formation's potential for carbon dioxide (CO₂) storage, emphasizing its geological stability, adequate porosity, and potential as a natural sealant, crucial for long-term CO₂ storage and climate change mitigation strategies.

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来源期刊

Journal of South American Earth Sciences 地学-地球科学综合

CiteScore

3.70

自引率

22.20%

发文量

364

审稿时长

6-12 weeks

期刊介绍： Papers must have a regional appeal and should present work of more than local significance. Research papers dealing with the regional geology of South American cratons and mobile belts, within the following research fields: -Economic geology, metallogenesis and hydrocarbon genesis and reservoirs. -Geophysics, geochemistry, volcanology, igneous and metamorphic petrology. -Tectonics, neo- and seismotectonics and geodynamic modeling. -Geomorphology, geological hazards, environmental geology, climate change in America and Antarctica, and soil research. -Stratigraphy, sedimentology, structure and basin evolution. -Paleontology, paleoecology, paleoclimatology and Quaternary geology. New developments in already established regional projects and new initiatives dealing with the geology of the continent will be summarized and presented on a regular basis. Short notes, discussions, book reviews and conference and workshop reports will also be included when relevant.