Baryt und ankerit aus Ammoniten des Berner Juras (Schweiz) |
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| Authors: | Hans Rudolf Wenk Dr John R Wenk |
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| Institution: | (1) Basel;(2) Institute of Geophysics and Planetary Physics, University of California, Los Angeles, USA |
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| Abstract: | Barite has been found for the first time in the Swiss Jura (Hirni, Passwang). Small, white crystals of barite with yellow ankerite grow on calcite in different chambers of a Bajocian ammonite. Chemical data (by microprobe analysis) and lattice parameters (refined by leastsquares from powder patterns) are given for the two minerals. There is a distinct correlation between the cell dimensions and the chemical composition for both of them. The genesis is discussed. |
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