Source : Luminescence Microscopy and Spectroscopy : Qualitive and Quantitative Applications
(Charles E. Barker and Otto C. Kopp, Editors)
Source : Luminescence Microscopy and Spectroscopy : Qualitive and Quantitative Applications
(Charles E. Barker and Otto C. Kopp, Editors)
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Concentric zoning in a euhedral calcian dolomite. Notice that orientation of concentric zones changes upon crossing a GSB(between arrows). The overall difference in CL intensity of the two narrow opposing growth sectors represents sectoral zoning. From Feder and Prosky(1986). |
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Oscillatory concentric zoning in a Mn-doped synthetic calcite crystal. Nonluminescent seed crystal is marked "S". Intrasectoral zoning occurs in the growth sector on the left. Note that concentric zoning cuts across the composition interface of the intrasectoral zoning(arrow). From Reeder et al.(1990). |
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Concentric zoning superimposed on sectoral zoning in a calcite cement crystal. Notice that overall CL intensity changes abruptly at the GSBs, some of which are indicated by arrows. From Reeder and Grams(1987). |
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Mn-doped synthethic calcite crystal showing sectoral- and intrasectoral zoning. Nonluminescent seed is indicated by "S". Sectoral zoning occurs where luminescence changes abruptly at GSBs(short arrows). Intrasectoral zoning occurs within a 1014 sector at upper left which grew from the corresponding(1014) face. Weak concentric zoning(not visible in photo) remains straight and continuous upon crossing IZ composition interface(ling arrow). |
