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Mineralogy of Secondary Phosphates and Sulfates Precipitated within the Sequence of Bat Guano Deposits in the Gossi Cave, Korea  

Jun, Chang-Pyo (Department of Geology, Kyungpook National University)
Lee, Seong-Joo (Department of Geology, Kyungpook National University)
Kong, Dal-Yong (National Research Institute of Cultural Heritage)
Kang, Il-Mo (Korea Institute of Geoscience and Mineral Resources)
Song, Yun-Goo (Department of Earth System Sciences, Yonsei University)
Publication Information
Journal of the Mineralogical Society of Korea / v.23, no.4, 2010 , pp. 395-402 More about this Journal
Abstract
Mineralogical characterization was performed for the mineral assemblages precipitated at the boundary between limestone bedrock and bat guano deposits in the Gossi Cave, Korea. Francoanellite, taranakite, ardealite, brushite and monetite are observed as phosphate minerals and gypsum and a small amount of barite as sulfate minerals in the guano deposits. With the increase of depth, phosphates are changed as following sequence: taranakite ${\rightarrow}$ francoanellite ${\rightarrow}$ ardealite ${\rightarrow}$ brushite ${\rightarrow}$ monetite. This sequence indicates that the major parameters controlling the physico-chemical conditions under which these mineral assemblages were deposited are pH and relative humidity.
Keywords
Bat Guano; phosphate; sulfate;
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