Ticsani 1.69

Ticsani or Tixani is a volcano in the Andes of Peru, about 5408m high. It is situated in the Moquegua Region, Mariscal Nieto Province, in the districts of Cuchumbaya and San Cristóbal. Ticsani, Ubinas and Huaynaputina sit on a volcanic lineament slightly oblique to the main volcanic front, and Ticsani and Huaynaputina are the product of discrete silicic eruptions and appear to share a geochemical source. The volcano is of dacitic composition and has been K-Ar dated to be 190000 years old. The volcano was constructed in several steps, starting from lava flows and volcaniclastics. This system collapsed westward leaving a 3km long NW-SE ridge. In the middle Holocene, three andesitic lava domes formed with explosive eruptions. These were later overlaid with brown pumice and bombs from a later phreatomagmatic eruption. The activity of this system ended with the emplacement of the Ticsani lava dome. One dacitic pumice fall of 0,4 km3 has been dated ca 11600 yr BP.