1 No early symptoms. 2  Blood in the urine - often intermittently. 3  Kidney area lump. 4  Abdominal swelling.  No pain - there is not usually any kidney pain unless the tumor is very advanced.
Gas content varies depending on what sort of material melted to form the magma. As a general rule, the most explosive eruptions come from magmas that have high gas levels and high viscosity, while the most subdued eruptions come from magmas with low gas levels and low viscosity.
They found gold in the plume near the crater, in the air up to 1000 km from the volcano and in near surface samples. Most of these gases originate in the mantle and are transported to the crust and surface by complex interactions with magma and rocks encountered along the way. In general, the gases are dissolved in the magma. At shallow depths, as pressure on the magma decreases, the gases leave the magma (exsolve).