Hypervelocity impacts can produce features in zircon that are not normally produced by endogenic processes. However, lightning can also induce extreme pressure-temperature excursions, and its effect on zircon has not been studied. With the aim to recognise features that form in response to extreme pressure-temperature excursions but are not unique to hypervelocity impacts, we imaged and undertook microstructural characterization of zircon in a fulgurite (a tubular body of glass and fused clasts that formed in response to a lightning strike). We document zircon with granular ZrO and rims of vermicular ZrO, features which vary in abundance with increasing distance from the fulgurite's central void. This indicates that these features formed in response to the lightning strike. Zircon dissociation to ZrO and SiO is a high-temperature, relatively low-pressure phenomenon, consistent with previous suggestions that lightning strikes involve extreme temperatures as well as pressures greater than those usually generated in Earth's crust but rarely > 10 GPa. The rims of monoclinic ZrO record crystallographic evidence for precursor cubic ZrO, demonstrating that cubic ZrO is not unique to hypervelocity impacts. Given the likelihood that this fulgurite experienced pressures of, at most, a few GPa, evidence for cubic ZrO indicates peak temperatures > 2000 °C.
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http://dx.doi.org/10.1038/s41598-021-81043-8 | DOI Listing |
PLoS One
December 2024
Department of Electrical Engineering, Faculty of Engineering at Shoubra, Benha University, Cairo, Egypt.
Cureus
October 2024
Department of Radiodiagnosis, Government Medical College Mahasamund, Mahasamund, IND.
Lightning strikes cause a spectrum of manifestations in the human body. Keraunoparalysis is a neurological condition where immediate but transient weakness occurs following a lightning strike. Herein, we report a case of a 45-year-old male with an acute onset of right-sided hemiparesis after a lightning strike.
View Article and Find Full Text PDFCureus
September 2024
Plastic Surgery, Dr. D. Y. Patil Medical College, Hospital and Research Centre, Dr. D. Y. Patil Vidyapeeth (Deemed to be University), Pune, IND.
Health Expect
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Department of/Basic Sciences/Medical Surgical Nursing, School of Nursing and Midwifery, Tehran University of Medical Sciences, Tehran, Iran.
Introduction: Multiple sclerosis (MS), a leading cause of disability in young adults worldwide, including in Iran, affects their whole life so common care is no longer effective. In this regard, context-based approaches should be considered for a holistic care delivery that accords with the patients' inputs. We aimed to explore patients' understanding of MS and their personal experiences of living with this disease.
View Article and Find Full Text PDFNanoscale Adv
September 2024
CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology Beijing 100190 China
Carbon nanotube films have drawn attention in the past decade as promising substitutes for aluminum or copper used in aircraft lightning strike protection (LSP) systems. Throughout this study, advanced lightweight lightning strike protection (LSP) composites are based on highly conductive super-aligned carbon nanotube films (SA-CNTFs) and a new isolation layer of zirconia fiber paper. The internal damage level of the composite laminate was assessed using a microfocus X-ray system and non-destructive ultrasonic techniques.
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