Hydrothermal wall-rock alteration is the interaction of hydrothermal fluids with the wall rock, causing changes or redistribution of chemical compositions of initial wall rocks.The study of hydrothermal alteration may...Hydrothermal wall-rock alteration is the interaction of hydrothermal fluids with the wall rock, causing changes or redistribution of chemical compositions of initial wall rocks.The study of hydrothermal alteration may enrich the understanding of hydrothermal solutions,and guide future exploration of mineral resources.展开更多
The reactivation of trace elements in source rocks is fundamental in the formation of many economic deposits. Although transport by fluid flow and infiltration is very effective along visible fractures, the migration ...The reactivation of trace elements in source rocks is fundamental in the formation of many economic deposits. Although transport by fluid flow and infiltration is very effective along visible fractures, the migration of trace elements from the inner part of solid cells to the weaknesses is much less efficient, and so becomes the bottleneck in the migration of these elements from their initial positions in the source rock to the final deposition site in an ore body. Diffusion may play a key role in the reactivation of trace elements. The overall migration pattern of trace elements in source rocks is characterized by an embedded sink mosaic structure, which possesses the self-similarity of a fractal. There are two general migration tendencies of trace elements. One is from within solid cells, such as mineral grains, toward the sink, consisting of weaknesses in the source rock. The other is from high-temperature fields toward low-temperature ones. High temperature favors the realization of these two tendencies. Conjugate geochemical anomalies are the inevitable result of a closed system.展开更多
基金Project supported by the Open Laboratory of Ore Geochemistry, Academia Sinica.
文摘Hydrothermal wall-rock alteration is the interaction of hydrothermal fluids with the wall rock, causing changes or redistribution of chemical compositions of initial wall rocks.The study of hydrothermal alteration may enrich the understanding of hydrothermal solutions,and guide future exploration of mineral resources.
基金This study was funded by Canadian International Development Agency, Excellence-selecting Grant for Go-Abroad Fellows of the Chinese Academy of Sciences and the Open Laboratory of Ore Deposit Geochemistry affiliated to the Chinese Academy of Sciences.
文摘The reactivation of trace elements in source rocks is fundamental in the formation of many economic deposits. Although transport by fluid flow and infiltration is very effective along visible fractures, the migration of trace elements from the inner part of solid cells to the weaknesses is much less efficient, and so becomes the bottleneck in the migration of these elements from their initial positions in the source rock to the final deposition site in an ore body. Diffusion may play a key role in the reactivation of trace elements. The overall migration pattern of trace elements in source rocks is characterized by an embedded sink mosaic structure, which possesses the self-similarity of a fractal. There are two general migration tendencies of trace elements. One is from within solid cells, such as mineral grains, toward the sink, consisting of weaknesses in the source rock. The other is from high-temperature fields toward low-temperature ones. High temperature favors the realization of these two tendencies. Conjugate geochemical anomalies are the inevitable result of a closed system.
