Authors: Harry K. Hahn
The linear Fraser Range in Western Australia seems to be the result of an ejecta ray that was ejected from the Ø 420 km Southern-Ocean-Crater. Different geophysical maps indicate this impact crater on the floor of the Southern Ocean, which I think is a secondary crater of the Permian Triassic Impact Event. The best indication comes from a magnetic anomaly map of the ocean floor which shows a precise semi-circular anomaly (see map below). Further indicaten comes from a combination of a gravity anomaly map of Australia and a topographic map of Antarctica. The visible bow-shaped structures indicate an impact crater of up to Ø 420 km. To provide first evidence for this impact crater I collected rock samples from the linear Fraser Range, which I believe was caused by a massive ejecta ray from this crater ( see maps below ). With a Raman microscope I analysed rock samples which I collected in the Fraser Range. The Raman spectra of quartz grains from the sample sites 50, 52 and 55 provide first indication for a shock event, the impact of an ejecta ray from the Southern Ocean Crater, which probably formed the Fraser Range. The shifts of two main Raman peaks of the analysed quartz grains from sample site 55 (Stone 1) to the lower frequencies 263 and 205 cm-1 and to 261/264 and 205 cm-1, and the shifts of two main Raman peaks in the quartz grains from sample site 50 (Stone 2) to the lower frequencies 204 and 124 cm-1 and to 260/265 and 204 (200,209) cm-1 ( double peaks ), and similar shifts in samples from site 52, which are visible in the Raman Spectra provide a first indication that the quartz from these sample sites was exposed to a shock pressure in the range of 20 - 22 GPa. ( see diagram in Appendix at page 34). Microscopic images of some analysed quartz grains from site 50, 52 & 55 may provide further proof for a shock event ( see pages 7-9, 14 & 21 ) The rock material from sample sites 50 and 55 may provide further evidence for the ejecta ray theory. On site 55 the rock consists of glass-like material that contains pipe-shaped bubbles filled with air (gas). All spectra were made with a BRUKER Senterra-II Raman Microscope (wavenumber precision <0.1cm-1)
Comments: 35 pages, 68 images, 50 diagrams
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