Evaluation of cored carbonates (COREF): a transect in the tropical to subtropical realm in the Ryukyu Islands (Japan)

有核碳酸盐评估（COREF）：琉球群岛（日本）热带至亚热带地区的横断面

• 批准号: 343086565
• 负责人: Professorin Dr. Maria Mutti
• 金额: --
• 依托单位: Institut für Geowissenschaften
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/343086565?language=en
• 关键词: Evaluation; cored; carbonates; COREF; transect

Objective of the ICDP Project COREF is to recover Quaternary reef-complex deposits in different settings across a transect from the tropical to subtropical realm in the Ryukyu Islands. Two major objectives are to (1) track the northern and southern limits of coral reef formation and associated carbonate systems, supposed to have migrated to higher and lower latitudes, respectively, responding to Quaternary glacial and interglacial cycles; (2) to examine how carbonate systems and coral communities have responded to previous high stands of sea-level and associated warm intervals of the mid-Pleistocene. Examining different carbonate settings across a latitudinal spectrum will provide information on how these responded to warmer episodes in the past, enabling to predict which future changes which may occur as a consequence of the ongoing global warming. To achieve these goals, 5 Sites have been choosen.Starting in November 2013, the Japanese PIs have started the coring program and have so far cored 11 Holes on three of the proposed five Sites (2, 4 and 5). At present, approximately 500 meters of cores are stored unprocessed at the repositories in Kochi (Japan). During a COREF project status workshop at the OSG Office in Potsdam, in July 2016, it was decided that the cores must be assessed scientifically before making a decision on to how to proceed with further drilling. Following the discussions in Potsdam, the Japanese PIs have requested our help to process the cores. We are very happy to do so, as it provides us with an opportunity to strengthen the cooperation between Japanese and international PIs and to better coordinate future work within the international community. Therefore, with this short 1-year project, we request funds to prepare and describe the cores, integrating the data in the DIS system of ICDP, to carry out a lithological and sedimentological study and to test the applicability of 3D visualization to the goals of the project. This short study will also provide insights on how to plan the final steps of the drilling.

ICDP COREF 项目的目标是在琉球群岛从热带到亚热带地区的横断面的不同环境中恢复第四纪珊瑚礁复合体沉积物。两个主要目标是（1）追踪珊瑚礁形成的北部和南部界限以及相关的碳酸盐系统，这些系统被认为已经分别迁移到高纬度和低纬度，以响应第四纪冰​​川和间冰期循环； （2）研究碳酸盐系统和珊瑚群落如何响应先前的高海平面和相关的中更新世温暖期。 检查纬度范围内的不同碳酸盐环境将提供有关这些环境如何应对过去变暖事件的信息，从而能够预测持续的全球变暖可能导致未来发生哪些变化。为了实现这些目标，选择了 5 个地点。从 2013 年 11 月开始，日本 PI 启动了取芯计划，迄今为止已在拟议的 5 个地点中的 3 个（2、4 和 5）上取芯了 11 个洞。目前，大约 500 米未处理的岩心存放在高知（日本）的储存库中。 2016 年 7 月，在波茨坦 OSG 办公室举行的 COREF 项目状态研讨会上，会议决定，在决定如何进行进一步钻探之前，必须对岩心进行科学评估。 在波茨坦讨论之后，日本 PI 请求我们帮助处理核心。我们很高兴这样做，因为这为我们提供了加强日本与国际PI之间的合作以及更好地协调国际社会未来工作的机会。 因此，在这个为期一年的项目中，我们请求资金来准备和描述岩心，整合ICDP DIS系统中的数据，开展岩性和沉积学研究，并测试3D可视化对项目目标的适用性。这项简短的研究还将提供有关如何规划钻探最后步骤的见解。