The carbonate skeleton of recent and fossil Coleoidea: Biological, physical or diagenetic control?

最近的和化石的鞘总纲的碳酸盐骨架：生物、物理或成岩控制？

• 批准号: 218386897
• 负责人: Professor Dr. Jörg Mutterlose
• 金额: --
• 依托单位: Institut für Geologie, Mineralogie und Geophysik
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/218386897?language=en
• 关键词: carbonate; skeleton; recent; fossil; Coleoidea

This project focuses on the structure and function of internal carbonate skeletons of recent and fossil Coleoidea (Sepia, belemnites) and their geochemical signals. It aims at understanding to which extent the geochemical composition of these skeletons, widely used by stratigraphers, geochemists and palaeoclimatologists is controlled by palaeobiological (1), physical (2) and/or diagenetic factors (3). We thereby clearly cover the interface of biology, autecology and diagenesis. 1. Cuttlebones of recent Sepia spp. suggest significantly different growth rates for tropical and high latitudinal taxa, a factor that may apply for belemnites as well. Different morphological groups of belemnites may have had a different ontogeny, occupying different habitats. This should be mirrored in the geochemical signals reflecting the composition of the ocean water. 2. Temperature and salinity seem to be the main physical factors controlling the composition of the belemnite guards. We want to clearly differentiate between both factors by using a geochemical multi proxy approach (δ18O, δ13C, Mg/Ca). 3. Potential diagenetic overprint, crucial for the interpretation of the signals, will be tested. By applying various techniques (SEM, cathodoluminiscence analyses, EBSD, microprobe, elemental analyses) to thin sections of various morphotypes, differential degrees of diagenetic alteration should be defined.

该项目着重于近期和化石鞘翅目（塞皮亚）及其地球化学信号的内部碳酸盐骨架的结构和功能。它旨在了解这些骨骼的地球化学组成在多大程度上由地层，地球化学主义者和古气候学家广泛使用的，由古生物学（1），物理（2）和/或诊断因素（3）控制。因此，我们清楚地涵盖了生物学，生物学和成岩作用的界面。 1。最近棕褐色属的野牛。建议热带和高纬度分类单元的生长速率显着不同，这也可能适用于贝莱恩特人。贝莱恩特人的不同形态群可能有不同的本体发育，占据了不同的栖息地。这应该反映在反映海水组成的地球化学信号中。 2。温度和盐度似乎是控制贝莱恩卫队组成的主要物理因素。我们希望通过使用地球化学多代理方法（Δ18O，Δ13C，mg/ca）清楚地区分这两个因素。 3。将测试潜在的成岩层，对信号的解释至关重要。通过将各种技术（SEM，阴道量填充分析，EBSD，微探针，元素分析）应用于各种形态型的薄部分，应定义不同程度的成岩变化。