Hydrothermal minerology of research drill hole Y-3, Yellowstone National Park, Wyoming

Keith E. Bargar; Melvin H. Beeson

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USGS · 70013929

Hydrothermal minerology of research drill hole Y-3, Yellowstone National Park, Wyoming

Keith E. Bargar·Melvin H. Beeson

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Abstract

The approximate paragenetic sequence of hydrothermal minerals in the Y-3 U. S. Geological Survey research diamond-drill hole in Lower Geyser Basin, Yellowstone National Park, Wyoming, is: hydrothermal chalcedony, hematite, pyrite, quartz, clay minerals (smectite and mixed-layer illite-smectite), calcite, chlorite, fluorite, pyrite, quartz, zeolite minerals (analcime, dachiardite, laumontite, stilbite, and yugawaralite), and clay minerals (smectite and mixed-layer illite-smectite). A few hydrothermal minerals that were identified in drill core Y-3 (lepidolite, aegirine, pectolite, and truscottite) are rarely found in modern geothermal areas. The alteration minerals occur primarily as vug and fracture fillings that were deposited from cooling thermal water. Refs.

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Source-reported bounding extent: 43.84245116699039° to 44.972570682240644° latitude; -111.016845703125° to -109.302978515625° longitude. This indicates report coverage, not an exact sampling location. View area on OpenStreetMap.

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Keith E. Bargar, Melvin H. Beeson. 1984. Hydrothermal minerology of research drill hole Y-3, Yellowstone National Park, Wyoming. https://pubs.usgs.gov/publication/70013929

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