Collaborative Research: Patagonia Lake Drilling Project (PATO): Phase II

该奖项是对巴塔哥尼亚湖钻探项目(PATO)第二阶段的支持，该项目是一个多学科的国际合作项目，旨在恢复和分析长湖芯的古环境和古气候历史。根据第一阶段的结果，研究人员计划将帕托第二阶段集中在拉戈卡迪尔，因为它包含了在连续性、年代学、时间分辨率和古气候敏感性方面最有希望的层序。PATO第二阶段的目标是：(1)在获得的地震剖面和景观图像分析的基础上，建立三维沉积和构造盆地历史。测年岩心的物理性质将用于验证和校准地震地层学。(2)进一步收集和分析现代湖泊和陆地成分，进行气候定标。沉积物捕捉器将记录沉积物成分、稳定同位素和生物替代物。这些是了解水文、地球化学和湖泊生产力变化所必需的。(3)分析在第一阶段中发现的沉积物岩芯，根据我们的联合放射性碳和火山灰年代学估计，其年代可以追溯到18,000年前，用于磁性、沉积学和地球化学地层学(包括碳酸盐和有机质上的稳定同位素)，以及花粉、木炭、硅藻和介形虫的古生态地层学(包括用于年代学评估的稳定同位素和氨基酸外消旋)。

This award is for support of Phase II of the Patagonian Lake Drilling Project (PATO), a multi-disciplinary, international collaborative effort to recover and analyze long lacustrine cores for paleoenvironmental and paleoclimate history. Based on the results of Phase I, the investigators plan to concentrate PATO Phase II on Lago Cardiel because it contains the most promising sequences in terms of continuity, chronology, temporal resolution, and paleoclimate sensitivity. PATO Phase II aims to: (1) Develop a 3-dimensional sediment and tectonic basin history based on analysis of the obtained seismic profiles and landscape imagery. Physical properties of the dated cores will be used to validate and calibrate the seismic stratigraphy. (2) Further collect and analyze the modern lake and terrestrial components for climate calibration. Sediment traps will document sediment components, stable isotopes and biological proxies. These are needed to understand the hydrological, geochemical and lake productivity changes. (3) Analyze sediment cores recovered during Phase I, estimated from our combined radiocarbon and ash chronology to date back beyond 18,000 years B.P., for magnetic, sedimentological, and geochemical stratigraphy (including stable isotopes on carbonates and organic matter), along with paleoecological stratigraphies for pollen, charcoal, diatoms, and ostracodes (including stable isotopes and amino acid racemization for chronological assessment).