The third dimension of the ultramafic-hosted Logatchev-1 hydrothermal field: sulfide formation, evolution, and fluid flow in the subseafloor

超镁铁质 Logatchev-1 热液田的三维：海底硫化物的形成、演化和流体流动

• 批准号: 16462548
• 负责人: Dr. Sven Petersen
• 金额: --
• 依托单位: Forschungseinheit Magmatische und Hydrothermale Systeme
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2005
• 资助国家: 德国
• 起止时间: 2004-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/16462548?language=en
• 关键词: third; dimension; ultramafic; hosted; Logatchev

The overall goal of this project is to establish, for the first time, the subseafloor extent and variability of hydrothermal mineralization in an ultramafic environment. We will use the remotely operated Rockdrill 2 of the British Geological Survey to sample 15 m long cores from the active Logatchev-1 hydrothermal field located at 14°45 N on the Mid-Atlantic Ridge. Geochemical, mineralogical, and isotopic investigations of hydrothermal precipitates and mineralized rocks will help to answer the following main scientific questions: 1. What is the size and vertical extent of mineralization and what are possible zonation patterns at depth? 2. What distinguishes the smoking crater environment from typical mound-style sulfide deposits? 3. What is the nature of mixing/cooling processes in the shallow subsurface and how do these processes influence the vent fluids and possibly the faunal assemblages? (in cooperation with other working groups) 4. What is the influence of episodic hydrothermal activity and remobilization processes on the metal budget and distribution within this deposit?

该项目的总体目标是首次确定超镁铁质环境中海底以下热液矿化的范围和可变性。我们将使用英国地质调查局的远程操作的Rockdrill 2从位于大西洋中脊14°45 N的活跃Logatchev-1热液田中取样15米长的岩心。热液沉淀物和成矿岩石的地球化学、矿物学和同位素研究将有助于回答以下主要科学问题：1。矿化的规模和垂直范围是什么，在深度上可能的分带模式是什么？2.冒烟的火山口环境与典型的丘状硫化物矿床有什么区别？3.浅层地下混合/冷却过程的性质是什么，这些过程如何影响喷口流体和可能的动物群组合？(in与其他工作组的合作）4.幕式热液活动和再活化过程对该存款内的金属收支和分布有何影响？