Authors: Harry K. Hahn
Raman spectra of quartz samples collected at sample site 21 near Ascea on the west-coast of Italy ( near Sapri ) provide first indication for the 160 km Salerno Impact Crater described in my hypothesis. The yet unknown 160 km “Salerno Crater“ belongs to a larger Secondary Impact Crater Chain, which was caused by impacting ejecta material that was ejected by the 1270 x 950 km Permian Triassic Impact Crater (PTI), located in the Arctic Sea near Alaska, according to my hypothesis. The samples which I collected to proof the “Salerno Crater“ did not provide the same clear evidence for a secondary impact crater, as for example the samples from Cabo de Creus in Spain, which provided solid evidence for the 130 x 110 km „Bay of Lyon Impact Crater“, that belongs to the same Secondary Impact Crater Chain as the “Salerno Crater“, caused by the PT Impact-Event. But the Raman spectra of quartz from sample site 21 at least provide a first indication for a shock event. The shifts of the main Raman bands (peaks) to the lower frequencies 261, 204 and 125 cm-1 (Stone 1) and to 260 and 205 cm-1 (Stone 2) which are visible in the Raman Spectra of these quartz-samples from sample site 21 at least give a first indication that the quartz was exposed to a shock pressure in the range of 20 - 22 GPa. The shock pressure probably was just below the treshold of 22 GPa so that the main quartz line at 464 didn’t shift to a lower frequency ( see explanation in the Appendix at page 28 ) Quartz in the samples from the sample site 20 also show shifts in one or two of the main Raman bands ( peaks ) to the lower frequencies 263 and 205 cm-1. The microscopic images of some of the analysed quartz grains in samples from site 21 & 20 may provide further proof for a shock event caused by an impact (see page 5 & 6). The images show complex micro-fracture-patterns in the analysed quartz grains. All spectra were made with a BRUKER Senterra-II Raman Microscope (wavenumber precision <0.1cm-1). Images of the analysed rock samples and photos of the sample sites are in the Appendix at page 24. More images of all sample sites are available on www.permiantriassic.de or www.permiantriassic.at
Comments: 29 pages, 53 images, 41 diagrams
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