Lunar Swirl

Living reference work entry
DOI: https://doi.org/10.1007/978-1-4614-9213-9_557-1

Definition

Often curvilinear, but sometimes diffuse surface features that are characteristically high albedo, optically immature, and associated with magnetic anomalies (Kramer et al. 2011b).

Category

A type of albedo feature

Description

Sinuous to irregular patterns. Often appear as curvilinear or looping pattern. Sometimes exhibit simpler shapes such as a single loop or diffuse bright spot. The bright appearance and curvilinear shape of lunar swirls are often accentuated by low-albedo regions that wind between the bright swirls, called dark lanes (Bell and Hawke 1981).

Swirls show anomalously high albedo and the spectral characteristics of immature material (little darkening and reddening of the spectrum due to space weathering). Lunar swirls are associated with magnetic anomalies (Fig. 1), although not every magnetic anomaly (especially weaker ones) has an identified swirl (Kramer et al. 2009). The swirls have no topographic expression (they overprint the surface on which they...

Keywords

Dust Mercury Hydroxyl Silicate 
This is a preview of subscription content, log in to check access

References

  1. Bell JF, Hawke BR (1981) The Reiner Gamma formation: composition and origin as derived from remote sensing observations. Proc Lunar Planet Sci Conf, 12th, Houston, pp 679–694Google Scholar
  2. Blewett DT (2011) Correction to Lunar swirls: examining crustal magnetic anomalies and space weathering trends. J Geophys Res 116, E06002. doi:0.1029/2011JE003852Google Scholar
  3. Blewett DT, Hawke BR, Lucey PG (2005) Lunar optical maturity investigations: a possible recent impact crater and a magnetic anomaly. J Geophys Res 110:E04015Google Scholar
  4. Blewett DT, Denevi BW, Robinson MS, Ernst CM, Purucker ME, Solomon SC (2010) The apparent lack of lunar-like swirls on Mercury: implications for the formation of lunar swirls and for the agent of space weathering. Icarus 209:239–246CrossRefGoogle Scholar
  5. Blewett D, Coman EI, Hawke BR, Gillis-Davis J, Purucker M, Hughes C (2011) Lunar swirls: examining crustal magnetic anomalies and space weathering trends. J Geophys Res 116:E02002. doi:10.1029/2010JE003656Google Scholar
  6. El-Baz F (1972) The Alhazen to Abul Wafa Swirl Belt: an extensive field of light-colored sinuous markings, Apollo 16: preliminary science report. NASA Spec Publ SP 315:29–93Google Scholar
  7. Garrick-Bethell I, Head JW III, Pieters CM (2011) Spectral properties, magnetic fields, and dust transport at lunar swirls. Icarus 212:480–492. doi:10.1016/j.icarus.2010.11.036CrossRefGoogle Scholar
  8. Hemingway D, Garrick-Bethell I (2012) Insights into Lunar swirl morphology and magnetic source geometry: models for the Reiner Gamma and Airy anomalies. 43rd Lunar Planet Sci Conf, abstract #1735, HoustonGoogle Scholar
  9. Hood LL, Schubert G (1980) Lunar magnetic anomalies and surface optical properties. Science 208:49–51CrossRefGoogle Scholar
  10. Hood LL, Vickery A (1984) Magnetic field amplification and generation in hypervelocity meteoroid impacts with application to lunar paleomagnetism. J Geophys Res 89:211–223CrossRefGoogle Scholar
  11. Hood LL, Williams CR (1989) The lunar swirls – distribution and possible origins. Proc Lunar Planet Sci Conf 19:99–113, HoustonGoogle Scholar
  12. Hood LL & Artemieva NA (2008) Antipodal effects of lunar basin-forming impacts: Initial 3D simulations and comparisons with observations. Icarus 193:485-502Google Scholar
  13. Kramer G, Blewett D, Hood L, Halekas J, Noble S, Hawke BR, Kletetschka G, Harnett E, Garrick-Bethell I (2009) The Lunar Swirls: a white paper to the NASA Decadal SurveyGoogle Scholar
  14. Kramer GY, Combe J-P, Harnett EM, Hawke BR, Noble SK, Blewett DT, McCord TB, Giguere TA (2011a) Characterization of lunar swirls at Mare Ingenii: a model for space weathering at magnetic anomalies. J Geophys Res 116:E04008. doi:10.1029/2010JE003669Google Scholar
  15. Kramer GY, Besse S, Dhingra D, Nettles J, Klima R, Garrick-Bethell I, Clark RN, Combe J-P, Head JW III, Taylor LA, Pieters CM, Boardman B, McCord TB (2011b) M3 spectral analysis of lunar swirls and the link between optical maturation and surface hydroxyl formation at magnetic anomalies. J Geophys Res 116:E00G18. doi:10.1029/2010JE003729Google Scholar
  16. Neugebauer M, Snyder CW, Clay DR, Goldstein BE (1972) Solar wind observations on the lunar surface with the Apollo-12 ALSEP. Planet Space Sci 20:1577–1591CrossRefGoogle Scholar
  17. Nicholas JB, Purucker ME, Sabaka TJ (2007) Age spot or youthful marking: origin of Reiner Gamma. Geophys Res Lett 34:L02205. doi:10.1029/2006GL027794CrossRefGoogle Scholar
  18. Pinet PC, Shevchenko VV, Chevrel SD, Daydou Y, Rosemberg C (2000) Local and regional lunar regolith characteristics at Reiner Gamma formation: optical and spectroscopic properties from Clementine and Earth-based data. J Geophys Res 105:9457–9475. doi:10.1029/1999JE001086CrossRefGoogle Scholar
  19. Richmond NC, Hood LL, Halekas JS, Mitchell DL, Lin RP, Acuña M, Binder AB (2003) Correlation of a strong lunar magnetic anomaly with a high-albedo region of the Descartes mountains. Geophys Res Lett 30(7):1395. doi:10.1029/2003GL016938CrossRefGoogle Scholar
  20. Schultz PH, Srnka LJ (1980) Cometary collisions on the Moon and Mercury. Nature 284:22–26CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Lunar and Planetary InstituteHoustonUSA