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

DFG Forschergruppe（FOR）1644“CHARON”融合了来自德国和邻国地球科学各学科的跨学科专家组的技能。研究领域从海洋地质学、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、古生物学到数值方法（反应迁移模型）和地质微生物学。在此，我们申请了第二阶段（2016-2019），并提出了由德国波鸿协调项目（ZP 0）指导和支持的八个相互关联的项目（TP）。TP 1/格拉兹，奥地利提交给DFG和奥地利FWF，如果成功，将由FWF根据DACH协议提供资金。我们的目标是继续在第一阶段进行的非常成功的工作，重点是碳酸盐成核、沉淀和生长，以及随后沿沿着成岩途径的非生物成因和生物成因碳酸盐的蚀变。总体目标是为社会提供一个定量和过程为导向的了解最近太古代碳酸盐档案。这项研究的重要性是因为海洋碳酸盐岩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，八项提案中有五项将从实验性方法和测试转向第二阶段，将具体的代理系统应用于自然改变的碳酸盐档案。除了生物成因和非生物成因的碳酸盐（文石，方解石，无定形碳酸盐），形成第一阶段的主要焦点，我们现在添加细粒碳酸盐沉积物和沉积岩，我们的研究材料。此外，PI和三个项目（TP 1，2，5）的学生专注于花岗岩和石灰岩，代表了复杂但常见但复杂的地球档案。项目TP 7/哥廷根贡献了地质微生物学领域的专业知识，并弥合了早期成岩领域热力学、动力学和代谢过程之间的差距。 CHARON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，复杂的热液蚀变实验的应用将继续进行，尽管需要调整和完善研究问题。结合起来，我们涵盖了所有的成岩域，从早期的成岩蚀变的存在，海洋孔隙水到埋藏成岩域的限制到近变质域。如果获得资助，这一合作研究项目的成果将代表碳酸盐研究的重大进展。

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.