require equable moderate temperature
1.It has a subtropical marine climate with frequent frost, moderate temperature, and abundant rainfall, and is snow-free.
2.and the hydrothermal chimney materials sampled from the Mariana Trough have main component of opal and show features of low temperature hydrothermal type, but a few pyrite samples show features of moderate temperature hydrothermal type.
5.The ore-forming fluids of Yanshanian magmatism evolved from high temperature,high salinity and K-rich fluids via moderate-high temperature and CO2(CH4)rich fluids to moderate-low temperature and low salinity fluids.
