Japan STA Program: Magmatic-Hydrothermal Fluids in the Ore Deposits and Active Geothermal Systems

该奖项支持约翰·蒙田博士在日本筑波的日本地质调查局获得为期24个月的日本科学技术厅博士后奖学金。蒙蒂安博士将与矿产和燃料资源部高级科学家杰弗里·赫登奎斯特博士合作开展一个名为“矿藏和活跃地热系统中的岩浆-热液流体”的研究项目。拟议的研究项目将侧重于活动火山-热液系统和(或)矿床的岩浆-热液流体连续介质模型，将采用各种方法从不同方向进行测试--活动系统与灭绝系统、从地表到浅层到深层的暴露，以及利用实地地质研究和实验室地球化学工作。岩浆-热液作用反映了岩浆体、周围岩石和地球水圈之间的物理和化学相互作用。在过去十几年中，在识别和了解火山、地热系统和矿床中的岩浆-热液过程方面取得了重大进展。最近的进展表明，从几乎没有外部输入的岩浆水流体到混合成因的流体，从岩浆水流体、岩石和地表成因的水流体之间的复杂相互作用产生的磁热流体的连续体。这些岩浆热液在上地壳中地球元素的循环中起着重要作用。加深对岩浆-热液流体和过程的了解，对于火山灾害评估、地热能开发以及热液金属矿床的勘探和开发具有深远的意义。***

Muntean 9800963 This award supports a 24 month Science and Technology Agency of Japan (STA) Postdoctoral Fellowship for Dr. John Muntean at the Geological Survey of Japan in Tsukuba, Japan. Dr. Muntean will work with Dr. Jeffrey Hedenquist, Senior Scientist, Mineral and Fuel Resources Department, on a research project entitled "Magmatic-Hydrothermal Fluids in the Ore Deposits and Active Geothermal Systems." The proposed research project will focus on the continuum model for magmatic-hydrothremal fluids, both for active volcanic-hydrothermal systems and or deposits, which will be tested from a variety of directions with a variety of approaches--active versus extinct systems, exposures from the surface through shallow to great depth, and using field- based geological study plus laboratory-based geochemical work. Magmatic-hydrothermal processes reflect the physical and chemical interactions between magma bodies, the surrounding rocks, and Earth's hydrosphere. Significant progress has been made in the last dozen years on identifying and understanding magmatic-hydrothermal processes in volcanoes, geothermal systems, and ore deposits. The recent progress points to a continuum of magnatic-hydrothermal fluids ranging from magmatic aqueous fluids with little external input through to fluids of mixed heritage that results from complex interactions between magmatic aqueous fluids, rocks , and aqueous fluids of surficial origin. These magmatic-hydrothermal fluids play a major role in cycling of the earth's elements in the upper crust. Increased understanding of magmatic-hydrothermal fluids and processes has profound implications in assessment of volcanic hazards, development of geothermal energy, and the exploration and development of hydrothermal metallic ore deposits. ***