The paleohydrogeologic condition and the tectonic stress field during the mineralization epoch of the Au (Cu) ore fluid in the bordering orogenic belt of Simao-Nanping basin reveal that the complicated paleohydrodynam...The paleohydrogeologic condition and the tectonic stress field during the mineralization epoch of the Au (Cu) ore fluid in the bordering orogenic belt of Simao-Nanping basin reveal that the complicated paleohydrodynamic condition during the Devonian-Carboniferous period in the northern Ailao-shan was favorable for the pre-enrichment of the mineral elements, and that the migration and the distribution of the groundwater were controlled by the tectonic stress field and driven by temperature and hydraulic gradients during the Yanshan-Himalayan movement epoch. Therefore, the determination of the low-pressure zone of the maximum principal stress is effective for the location of the Au deposits (ore spots).展开更多
T<sub>HE</sub> structure of aqueous and metal bearing solution, if observed dynamically by in situ spectrometer atelevated temperatures and pressures, will show new information on the kinetic mechanism of ...T<sub>HE</sub> structure of aqueous and metal bearing solution, if observed dynamically by in situ spectrometer atelevated temperatures and pressures, will show new information on the kinetic mechanism of ore-formingfluids and water/mineral interactions. 1 Water and NaCl aqueous solutions The nature of water and NaCl·H<sub>2</sub>O solutions has been examined in a temperature range from 25 to850℃ and pressure from 1.33×10<sup>5</sup> to 1.33×10<sup>6</sup> Pa by using hydrothermal diamond anvil cell （HDAC）and in situ FT-IR spectroscopy （an infra-red microscope: Bio-Rad, UMA, 500）. The phase transitionsof NaCl-H<sub>2</sub>O solutions can be observed by using an optical microscopy connected with HDAC, and at thesame time the infra-red spectra of NaCl-H<sub>2</sub>O binary system at any fixed physical chemical conditions canbe tested.展开更多
基金This paper is supported by NKBRSF Project (No. G1999043205) the Returned Studenes Fund of CME.
文摘The paleohydrogeologic condition and the tectonic stress field during the mineralization epoch of the Au (Cu) ore fluid in the bordering orogenic belt of Simao-Nanping basin reveal that the complicated paleohydrodynamic condition during the Devonian-Carboniferous period in the northern Ailao-shan was favorable for the pre-enrichment of the mineral elements, and that the migration and the distribution of the groundwater were controlled by the tectonic stress field and driven by temperature and hydraulic gradients during the Yanshan-Himalayan movement epoch. Therefore, the determination of the low-pressure zone of the maximum principal stress is effective for the location of the Au deposits (ore spots).
文摘T<sub>HE</sub> structure of aqueous and metal bearing solution, if observed dynamically by in situ spectrometer atelevated temperatures and pressures, will show new information on the kinetic mechanism of ore-formingfluids and water/mineral interactions. 1 Water and NaCl aqueous solutions The nature of water and NaCl·H<sub>2</sub>O solutions has been examined in a temperature range from 25 to850℃ and pressure from 1.33×10<sup>5</sup> to 1.33×10<sup>6</sup> Pa by using hydrothermal diamond anvil cell （HDAC）and in situ FT-IR spectroscopy （an infra-red microscope: Bio-Rad, UMA, 500）. The phase transitionsof NaCl-H<sub>2</sub>O solutions can be observed by using an optical microscopy connected with HDAC, and at thesame time the infra-red spectra of NaCl-H<sub>2</sub>O binary system at any fixed physical chemical conditions canbe tested.
