FOR 1644: CHARON: Marine Carbonate Archives: Controls on Carbonate Precipitation and Pathways of Diagenetic Alteration

DFG Forschergruppe (FOR) 1644“CHARON”合并了德国和邻国地球科学各个学科的跨学科专家小组的技能。研究领域包括海洋地质学、碳酸盐沉积学和地层学、（同位素）地球化学、岩石学、材料研究、岩石物理学、古生物学、数值方法（反应输运模型）和地球微生物学。在此，我们申请第二阶段（2016-2019），并提出八个相互关联的项目（TP），以德国波鸿的一个协调项目（ZP0）为指导和支持。奥地利格拉茨的TP1项目同时提交给DFG和奥地利FWF，如果成功，将根据DACH协议由FWF提供资金。我们的目标是继续第一阶段非常成功的工作，重点关注碳酸盐成核、沉淀、生长以及随后沿成岩路径的非生物成因和生物成因碳酸盐的变化。总体目标是为社会提供一个定量的和以过程为导向的理解最近到太古宙碳酸盐岩档案。这项研究的重要性在于，海洋碳酸盐是重建地球系统演化的最重要的岩石类型，涉及海洋的物理、化学和生物演化，以及大气成分和气候动力学的变化。在第一阶段的基础上，8个提案中的5个将从实验方法和测试转移到第二阶段，将特定的代理系统应用于自然蚀变的碳酸盐档案。除了生物成因和非生物成因碳酸盐（文石、方解石、无定形碳酸盐）构成第一阶段的主要焦点外，我们现在将细粒碳酸盐沉积物和沉积岩添加到我们的研究材料中。此外，三个项目（TP1, 2, 5）的PI和学生主要研究白云岩和白云化灰岩，它们代表了地球复杂而又常见而又复杂的档案。TP7/Göttingen项目为地球微生物学领域贡献了专业知识，填补了早期成岩领域热力学、动力学和代谢过程之间的空白。卡戎的一个重要优势在于实验工作和实地研究之间的密切联系。特别是，将继续应用复杂的热液蚀变实验，尽管有调整和改进的研究问题。综上所述，我们涵盖了所有成岩域，从早期成岩蚀变到海相孔隙水，再到埋藏成岩领域的极限，再到近变质域。如果得到资助，这个合作研究项目的结果将代表碳酸盐研究的一个关键进展。

The DFG Forschergruppe (FOR) 1644 "CHARON" merges the skills of an interdisciplinary group of experts from various disciplines in Earth Sciences in Germany and neighbouring countries. Research fields dealt with range from marine geology, carbonate sedimentology and stratigraphy, (isotope) geochemistry, petrology, material research, petrophysics, palaeontology to numerical approaches (reactive transport modelling) and geomicrobiology. Here, we apply for phase II (2016-2019) and propose eight interconnected projects (TP) guided and supported by a coordination project (ZP0) at Bochum, Germany. TP1/Graz, Austria is submitted to both, DFG and the Austrian FWF and - if successful - will be financed by FWF according to the DACH agreement. Our aim is to continue the very successful work as performed during phase I with focus on carbonate nucleation, precipitation, and growth and the subsequent alteration of abiogenic and biogenic carbonates along diagenetic pathways. The overarching aim is to provide the community with a quantitative and process-oriented understanding of Recent to Archean carbonate archives. The importance of this research results from the fact that marine carbonates are the most important rock type for reconstructing Earth System evolution with respect to the physical, chemical, and biological evolution of the ocean as well as changes in atmospheric composition and climate dynamics. Building on phase I, five out of eight proposals will move from experimental approaches and testing to phase II application of specific proxy systems to naturally altered carbonate archives. In addition to biogenic and abiogenic carbonates (aragonite, calcite, amorphous carbonate), forming the main focus of phase I, we now add fine-grained carbonate sediments and sedimentary rocks to our study materials. Moreover, the PI's and students of three projects (TP1, 2, 5) focus on dolomites and dolomitized limestones, representing complex but common but complex archives of planet Earth. Project TP7/Göttingen contributes expert knowledge in the field of geomicrobiology and bridges the gap between thermodynamics, kinetics, and metabolic processes in the early diagenetic realm. An important strength of CHARON lies in the very close links between experimental work and field studies. Particularly, the application of sophisticated hydrothermal alteration experiments will be continued albeit with adapted and refined research questions. In combination, we cover all diagenetic domains spanning from the earlies diagenetic alteration in the presence to marine porewaters to the limits of the burial diagenetic realm into the anchimetamorphic domain. If funded, the outcome of this collaborative research project will represent a critical advance in carbonate research in general.