Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.1080/00206814.2018.1512057 |
| Flickering flames over the Libyan Desert? | |
| Saul, John M. | |
| 通讯作者 | Saul, John M. |
| 来源期刊 | INTERNATIONAL GEOLOGY REVIEW
 |
| ISSN | 0020-6814 |
| EISSN | 1938-2839 |
| 出版年 | 2019 |
| 卷号 | 61期号:11页码:1340-1369 |
| 英文摘要 | Libyan Desert Glass (LDG), rediscovered in modern times in 1932, is an ultrahigh-temperature glass composed of nearly pure SiO2. LDG is found as surface float in Egypt's Libyan (Western) Desert, its strewnfield defined by the intersection of major faults. Extra-terrestrial components are present in LDG but there is no associated impact crater. LDG is not an impactite, nor do pieces exhibit aerodynamic forms. Extremely viscous silica remained hot long enough to flow several centimetres. Additional constraints on the origin of LDG are imposed by exotic materials found nearby: a dark 30-gram granular micro-diamond mass, mullite-magnetite-silica glass rocks with micro-diamonds, lumps of fine-grained magnetite, titanium filaments, titanium nitride, titanium aluminide, aluminium oxycarbonitride, phosphides, silver, zirconium, zinc, carbonaceous grains, and metal grains coated with carbonaceous materials. The region is underlain by 500-3000 m of flat-lying sandstone composed of quartz grains and little else. To account for LDG and the other unusual materials and nearby outgassing vents, serpentinization is evoked. Products of this complex low-temperature crustal process include serpentine, magnetite, aqueous silica, and great quantities of hydrogen. The hydrogen, produced in Basement rocks beneath the sandstones, may have risen along faults, passing around grains of quartz (with which it does not react) until slowed by tight conditions, perhaps self-sealed by silica produced during serpentinization. Columns of quartz hundreds or thousands of metres high with intergranular spaces filled with H-2 (+/- CH4) may have been established with some hydrogen leaking into the surface domain while still more was produced at depth. Disturbance by occasional impacts or airbursts, large or small, would violently release great columns of pressurized hydrogen, which, ignited, would burn until exhaustion. Such sustained heating events could be repeated. Exotic products might come from materials formed cold in the outer solar system, transformed in a great flickering flame with temperatures perhaps exceeding 1800 degrees C. |
| 英文关键词 | Libyan Desert Glass serpentinization hydrogen flame deep gas Hypatia impact diamonds Pelusium Line craters |
| 类型 | Review |
| 语种 | 英语 |
| 国家 | France |
| 收录类别 | SCI-E |
| WOS记录号 | WOS:000470887700003 |
| WOS关键词 | GILF KEBIR REGION ; SW EGYPT EVIDENCE ; CIRCULAR STRUCTURES ; NONIMPACT ORIGIN ; SOUTHWEST EGYPT ; WESTERN DESERT ; GLASS EVIDENCE ; IMPACT CRATER ; INCLUSIONS ; FIELD |
| WOS类目 | Geology |
| WOS研究方向 | Geology |
| 资源类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/216316 |
| 作者单位 | ORYX, 16 Rue Pre Aux Clercs, F-75007 Paris, France |
| 推荐引用方式 GB/T 7714 | Saul, John M.. Flickering flames over the Libyan Desert?[J],2019,61(11):1340-1369. |
| APA | Saul, John M..(2019).Flickering flames over the Libyan Desert?.INTERNATIONAL GEOLOGY REVIEW,61(11),1340-1369. |
| MLA | Saul, John M.."Flickering flames over the Libyan Desert?".INTERNATIONAL GEOLOGY REVIEW 61.11(2019):1340-1369. |
| 条目包含的文件 | 条目无相关文件。 | |||||
| 个性服务 |
| 推荐该条目 |
| 保存到收藏夹 |
| 导出为Endnote文件 |
| 谷歌学术 |
| 谷歌学术中相似的文章 |
| [Saul, John M.]的文章 |
| 百度学术 |
| 百度学术中相似的文章 |
| [Saul, John M.]的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| [Saul, John M.]的文章 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
