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New data of typomorphic features of diamonds from placers in North Timan |
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| Authors: | G K Khachatryan M B Kopchikov V K Garanin M V Chukichev N N Golovin |
| Institution: | (1) Central Institute of Geological Exploration for Base and Precious Metals, Varshavskoe sh. 129, Moscow, 117545, Russia;(2) Faculty of Geology, Moscow State University, Moscow, 119991, Russia;(3) JSC Arkhangelskgeoldobycha, Troitsky pr. 168, Arkhangelsk, 163045, Russia |
| Abstract: | The morphological and spectral-optical properties of diamond crystals from placers in North Timan rivers have been studied with IR-spectroscopy and cathode luminescence methods. As a result, correlation between external characteristics of diamonds (size and degree of mechanical damage) and number of optically active centers has been revealed. The habit and the type of distribution of structural defects in diamond crystals studied are comparable with those in diamonds from the Archangelsk Region and North Timan’s placers. Based on the obtained data, origin issues and possible primary sources of diamonds from North Timan’s placers are discussed. |
| Keywords: | diamond crystal morphology IR-spectroscopy structural defects nitrogen centers cathode luminescence placers primary sources kimberlite pipes |
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