C- and O-isotope and trace element composition of synthetic carbonates

合成碳酸盐的 C 和 O 同位素和微量元素组成

• 批准号: 16297171
• 负责人: Professor Dr. Augusto Mangini
• 金额: --
• 依托单位: Institut für Umweltphysik
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2005
• 资助国家: 德国
• 起止时间: 2004-12-31 至 2008-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/16297171?language=en
• 关键词: isotope; trace; element; composition; synthetic

In a laboratory experiment calcite is precipitated using a karst-analogue set-up. This study aims to show the effects of kinetic, evaporation and exchange processes on the carbon and oxygen isotopes as well as on selected trace elements of synthetically precipitated carbonates. Such data are crucial for understanding the record of stable isotopes and trace elements in natural speleothems and their relationship to palaeoclimate. The experiments are carried out using a set-up which allows to individually control a variety of relevant parameters such as temperature, humidity, pCO2 and drip-rate. The experimental set-up will be varied in order to get homogenous and heterogeneous nucleation. In addition, the experiments will be modeled using PHREEQC.

在实验室实验中，方解石沉淀使用岩溶模拟设置。本研究的目的是显示的动力学，蒸发和交换过程的碳和氧同位素，以及对合成沉淀碳酸盐的选定的微量元素的影响。这些数据对于了解天然洞穴沉积物中稳定同位素和微量元素的记录及其与古气候的关系至关重要。使用允许单独控制各种相关参数（如温度、湿度、pCO2和滴速）的设置进行实验。实验装置将变化，以获得均匀和非均匀成核。此外，将使用PHREEQC对实验进行建模。