Dissertation Enhancement Grant: Middle Paleogene Palynology of Colombia, South America: Biostratigraphic, Sequence Stratigraphic, and Paleogeographic Implications

974122 Dilcher美洲项目论文强化基金将资助Carlos Jaramillo先生，在佛罗里达大学David Dilcher博士的指导下，对哥伦比亚安第斯山脉西部、东北部、中部和东部四个安第斯省的沉积地层和层序地层学进行研究。该研究将包括花粉/孢子的详细分类调查和与现存分类群的比较。预计该研究将为该区古近系植物区系组成的识别提供资料，并进一步完善现有的生物地层分辨率。主要目的是确定孢粉响应与海平面和基准面变化相关的模式，并将其与进化变化区分开来。孢粉学（花粉/孢子）孢粉相的使用已被证明是进行地质和植被重建的适当技术。该研究将提供这一时期地质和植被发育的综合概况，并将为南美洲北部古近纪的历史知识提供关键的联系。古近纪包括主要的进化过程，特别是被子植物的进化过程，以及全球环流和气候变化、海平面波动和构造运动的重大变化。然而，由于缺乏详细的地质研究，它在南美洲西北部的历史在很大程度上仍然未知。对重要的大型事件，如安第斯隆起过程及其与该地区高度物种多样性的关系的充分了解，由于缺乏信息而受到阻碍。此外，该地区一些最重要的油气储集层位于古近纪和始新世陆相岩中，处于构造复杂性高的地区。对古近系地层学和生物地层学的进一步认识，将有助于这些储层的成功勘探。＊＊＊

974122 Dilcher This Americas Program dissertation enhancement grant will fund Mr. Carlos Jaramillo, under the direction of Dr. David Dilcher, University of Florida, on a study of the palynostratigraphy and sequence stratigraphy of four Andean provinces in the western, northeastern, central and eastern Colombian Andes. The study will include a detailed taxonomic survey of pollen/spores and comparison with living taxa. It is anticipated that the research will provide data for recognizing flora constituents in the region during the Paleogene , as well as refine the existent biostratigraphic resolution. The main goal is to identify patterns of palynologic responses relative to sea-level and base-level changes, and distinguish them from evolutionary changes. The use of palynology (pollen/spores) palynofacies are proven and adequate techniques to make geological and vegetational reconstructions. The research will provide an integrated overview of the geological and vegetational development during this period, and will provide a critical link in the knowledge of the Paleogene history of northern South America. The Paleogene encompasses major evolutionary progress, especially within the angiosperms, and major changes in global circulation and climatic changes, sea-level fluctuations and tectonism. However, its history in northwestern South America remains largely unknown due to the scarcity of detailed geologic research. An adequate understanding of important large-scale events, such as the Andes uplift process and its relation to the high species diversity in the area, has been hindered by this lack of information. Furthermore, some of the most important hydrocarbon reservoirs in the region are located in Paleogene and Eocene continental rocks, in zones with high structural complexities. A better understanding of the paleogene stratigraphy and biostratigraphy will enhance the successful exploration of these reservoirs. ***