Geophysics

2204 Submissions

[2] viXra:2204.0170 [pdf] submitted on 2022-04-29 08:00:54

LG Space as Unified View of Imaging for Vertical and Lateral Geometric Complexity

Authors: August Lau, Alfonso Gonzalez
Comments: 4 Pages.

Seismic imaging is challenged by vertical complexity (denseness) of too many reflections and lateral complexity (roughness) of surfaces. The end members are usually sparse (easy for imaging) or fractal (too complex for imaging). Is there a more unifying concept that stands between very simple to very complex? We will present a unified view of geometric complexity by introducing the concept of LG (locally dense but globally sparse). LG is not as simple as sparsity (far apart) but not as complex as fractal (denseness). We will use 2 examples to illustrate the concept.
Category: Geophysics

[1] viXra:2204.0023 [pdf] replaced on 2022-04-15 08:09:44

The 15x11 km Anaga Crater on Tenerife (Canary Islands)_raman Spectra of Selected Rock Samples

Authors: Harry K. Hahn
Comments: 37 pages, 80 images, 76 diagrams

Here a summary of the Raman-spectroscopic analysis a of rock-samples which I have collected near the Ø 15 x 11 km “Anaga Impact Crater“ on Tenerife, and on other interesting sites on this Island. From the analysed feldspar-samples some samples may show Raman-spectra which indicate (W)-weakly-shocked or (M)-moderately-shocked Feldspar. But these Raman-spectra must be analysed by experts who have the experience to correctly assess such spectra. The Raman-spectra of the feldspar-samples from sites No.: 2, 5, 7, 9 & 58 may indicate shocked minerals. (an explanation to Raman spectra of shocked Alkali-Feldspar: see at page 30 in the Appendix_3). Minerals that were indicated by the Raman-spectroscopic analyses : Labradorite(2); Orthoclase(5); Augite, Titanite, Reyerite, Analcime(7); Annite, Augite(9); Anorthoclase(58) (->samples site No. in () Beside possible shocked minerals or minerals which may indicate an impact event, there definitely is one site on Tenerife that should be examined in more detail, in regards to the described impact event. This is sample-site 58, where an old-rock-island is located inside the large caldera of the Pico del Teide Volcano. This mass of old-rock probably was lifted by the impact or by the later volcano, from the original ancient ocean floor. Other interesting sites are located on the road along the ridge-top of the Anaga-Range, in the Teno-Mountain-Range and on site 10 which also belongs to the old basaltc shield of Tenerife. According to my hypothesis the hot spots which caused the Canary Islands originally were impact sites of large ejecta fragments, which were ejected from the Permian Triassic Impact Crater in the Arctic Sea. And I am sure that these impact sites (hot spots) were produced by the same large-scale secondary impact event (caused by the PTI), which also has formed the "Bay of Lyon Crater" and other secondary-impact-structures in Spain. This large-scale impact event is visible on the Gravity-Anomaly Map of the Canarian Islands. The PT-Impact Event probably formed a large secondary-crater, the hypothetical Ø430x290km Gibraltar-Crater (GIC) (see gravity anomaly map). The oblique (ellipitical) impact-craters indicated on this Gravity-Anomaly-map, offshore of Tenerife, Fuerteventura and Lanzarote, all belong to this impact-event and are located along the hypothetical crater-wall (-rim) of the GIC. A magnetic-anomaly-map of the Atlantic-Ocean-floor south-west of Spain provides indication for this Ø430x290 km Gibraltar Crater. (see the explanation on pages 28 & 29 of my PT-Impact-Hypothesis Part-2.
Category: Geophysics