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Some observations on the hot springs of central Chile
Author(s) -
De Grys Ann
Publication year - 1965
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr001i003p00415
Subject(s) - geology , batholith , karst , volcano , geochemistry , andesites , gypsum , andesite , geomorphology , mineralogy , volcanic rock , tectonics , paleontology
The Cordilleran hot springs of central Chile can be divided into four groups: ( A ) Pre‐Cordillera springs of variable composition emerging from continental sediments and andesites. Temperature ranges from 22 to 30°C. ( B ) Inner Cordillera springs found along a zone of structural weakness indicated by the presence of volcanoes and faults. The waters are rich in Ca, Mg, HCO 3 , and SO 4 , and minor elements, Sr, B, V, and Ti derived from marine sediments containing limestone and gypsum deposits. Some of the springs have considerable amounts of Fe and Mn. Temperatures are variable, ranging from 30 to 80°C. ( C ) Sulfuric‐acid type springs with a temperature of about 85°C.‐These waters leach Fe, Mn, and Al from the rocks. ( D ) Dilute NaCl springs in the batholith with temperatures ranging from 40 to 75°C. All the springs are near volcanic centers. The origin of the water is discussed, but not all the springs are considered to have contributions from magmatic sources. Some variations in the discharge occur, but the temperature and comparison, so far as can be ascertained, are constant.