Proxies deduced from borehole geophysics help to reconstruct the stratigraphic architecture and climatic history of the Tibetan Plateau

从钻孔地球物理学推导的代理有助于重建青藏高原的地层结构和气候历史

• 批准号: 517981011
• 负责人: Dr. Christian Zeeden, since 4/2023
• 金额: --
• 依托单位: Leibniz-Institut für Angewandte Geophysik (LIAG)
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/517981011?language=en
• 关键词: Proxies; deduced; borehole; geophysics; help

We plan to collect borehole logging data as part of the ICDP project "The Nam Co Drilling Project, Tibet (NamCore): A one million year sedimentary record from the third pole" and to interpret it together with the participating working groups from other disciplines. Within the framework of this project, borehole geophysical data will be collected at three borehole sites. In a first step, these data will be compiled for the individual sites and then from all locations and tested for similarities and differences. As soon as core data become available, borehole and core data will be combined. We will apply time series analysis and cyclostratigraphy methods to these merged multivariate data sets. Changing sediment properties will be related to changes in past solar irradiance, and from this, a time-depth scale will be derived. In the next step, multivariate statistics will be applied to understand the complexity of the datasets and to get an idea of the intersected lithology by means of cluster analysis. Finally, we will synthesize the information on lithology and depositional age, develop ideas on the drought/precipitation relationship and interpret them in the context of global climate evolution.

我们计划收集钻孔测井数据，作为ICDP项目“西藏纳木错钻探项目（NamCore）：第三极一百万年沉积记录”的一部分，并与其他学科的参与工作组一起对其进行解释。在本项目框架内，将在三个钻孔地点收集钻孔地球物理数据。第一步，将为各个地点汇编这些数据，然后从所有地点汇编这些数据，并对相似性和差异进行测试。一旦获得岩心数据，将合并钻孔和岩心数据。我们将应用时间序列分析和旋回地层学的方法，这些合并的多元数据集。沉积物性质的变化将与过去太阳辐照度的变化有关，并由此得出时间-深度尺度。下一步，将应用多元统计来了解数据集的复杂性，并通过聚类分析来了解岩性。 最后，我们将综合岩性和沉积年龄的信息，发展干旱/降水关系的想法，并在全球气候演变的背景下解释它们。