Ore Metals in Melt-Volatile Systems

[805313] candela / piccoli这个持续的研究项目将为矿床勘探、火山灾害和火山对大气的影响等问题提供新的实验数据。在这项研究中，实验将在压力接近100兆帕的熔体、盐水和蒸气之间进行一些元素的分配，包括Au（正在进行的熔体挥发性研究）、Fe、Co、Cu、Ni和Zn。对于许多这些元素，不存在熔化易失性分区数据；此外，对于另一些，它们的平衡还没有在蒸汽+盐水稳定场和/或较低压力下进行研究。重点将放在配分平衡的适当热力学公式上。其中一些实验将在无蒸汽的盐水熔体场中进行。总的来说，这些实验对于我们理解次火山岩浆/热液成矿环境中的熔融-蒸汽-盐水平衡至关重要。因此，实验数据将用于进一步设计模型，以预测火山挥发物的成分，并预测流体包裹体成分和矿物前景的矿石金属库存。

9805313Candela/PiccoliThis continuing research program will provide new experimental data that bear on problems of mineral deposit exploration, volcanic hazards and volcanic inputs to the atmosphere. In this research endeavor, experiments will be performed on the partitioning of a number of elements, including Au (continuing ongoing melt-volatile studies), Fe, Co, Cu, Ni and Zn, between melt, brine and vapor at pressures near 100 MPa. For many of these elements no melt-volatile partitioning data exist; further, for others, their equilibria have not been investigated in the vapor + brine stability field and/or at lower pressures. Emphasis will be placed on the proper thermodynamic formulation of partitioning equilibria. Some of these experiments will be performed in the vapor-absent brine-melt field. Overall these experiments are critical to our understanding of melt-vapor-brine equilibria in subvolcanic magmatic/hydrothermal ore-forming environments. Thus the experimental data will be used to further models designed to predict the composition of volcanic volatiles and to predict fluid inclusion compositions and ore metal inventories of mineral prospects.