27:
134:. Subsequent wind erosion of the motionless ice brings trapped meteorites back to the surface once more where they may be collected. This process concentrates meteorites in a few specific areas to much higher concentrations than they are normally found everywhere else. The contrast of the dark meteorites against the white snow, and lack of terrestrial rocks on the ice, makes such meteorites relatively easy to find. However, the vast majority of such ice-embedded meteorites eventually slide undiscovered into the ocean.
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The search for the meteorites is done visually. A team of four to ten explorers, typically meteorite scientists, lives for 5–7 weeks on the ice field. Using snowmobiles spaced 30 m apart they scan the blue ice for meteorites. Once a specimen has been located its position is found using GPS and
181:
The ANSMET program, together with parallel
Antarctic collection programs run by Japan, China, and other nations, is a major source of the extraterrestrial material that is available for scientific investigation. All of the material collected by ANSMET is curated for the purpose of research and
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The naming convention for
Antarctic meteorites collected by ANSMET is as follows: a three letter prefix based on the location the meteorite is found, followed by two numbers that designate the year of collection, and a three number unique identifier. For example,
314:
The 2011–2012 ANSMET expedition returned to the Miller Range. Despite being hampered by heavy snow, the team collected 302 meteorites, which was just enough to bring the total number of meteorites collected by ANSMET over the 20,000 milestone.
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in
Houston, Texas. Of the almost 16,000 Antarctic meteorites collected since 1976, over 14,000 have been permanently transferred to the Smithsonian. Curators at the Department of Mineral Sciences at the
246:. Meteorites of greater interest and undergoing detailed study are kept at JSC for distribution to the scientific community, though, ultimately, all samples collected by ANSMET are transferred to the
126:. Such meteorites are quickly covered by subsequent snowfall and begin a centuries-long journey traveling "downhill" across the Antarctic continent while embedded in a vast sheet of
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classify each representative chip of meteorite sent by NASA. Results and descriptions are published in the
Antarctic Meteorite Newsletter, issued twice a year.
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The 2004–2005 ANSMET expedition consisted of 12 members and collectively they returned 1,230 meteorites. These included over 130 kilograms (290 lb) of
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122:. This geographical area serves as a collection point for meteorites that have originally fallen on the extensive high-altitude ice fields throughout
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230:
bag. The teams make sure that the specimen remains frozen throughout its journey back to the
Antarctic Meteorite Curation Facility at the
165:, and 12 more during the 1973–1974 season, 663 during the 1974–1975 season, and 307 during the 1975–1976 season. Based on that success,
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The 2010–2011 ANSMET expedition consisted of a 9-member systematic team and a 4-member reconnaissance team (including astronaut
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public education, in contrast to meteorites collected privately, the bulk of which are frequently sold to collectors.
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311:) that explored new areas where future teams may go. Collectively they returned over 1200 meteorites.
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Department of Earth, Environmental and
Planetary Sciences at Case Western Reserve University, ANSMET
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meteorites, one of which is the largest yet found in
Antarctica at over 30 kilograms (66 lb).
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149:. Subsequent discoveries of three more were made in 1961 and 1964 by Russian geologists near
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The 2006–2007 ANSMET expedition consisted of a 9-member systematic team (including astronaut
549:. article in Planetary Science Research Discoveries, educational journal. February 28, 2002.
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541:. article in Planetary Science Research Discoveries, educational journal. November 7, 2001.
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for the 1976–1977 season, and subsequent seasons up to and including the 1993–1994 season.
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The 2009–2010 ANSMET expedition consisted of 8 members that returned 1010 meteorites.
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and
Neptune Mountains. In 1969, Japanese explorers discovered nine meteorites at the
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received funding for ANSMET to commence in the 1976–1977 season. Cassidy was the
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130:. Portions of such flowing ice can be halted by natural barriers such as the
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356:. Cambridge: Cambridge University Press. pp. 114–115, 122, 148, 249.
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for permanent storage and curation. These meteorites are housed at the
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it is given an identification number. It is then placed in a sterile
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The first
Antarctic meteorite was discovered during the 1911–1914
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421:"Antarctic Meteorite Program, National Museum of Natural History"
400:"Antarctic Meteorite Program, National Museum of Natural History"
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500:"Antarctica is a Hot Spot for UA Scientists Hunting Meteorites"
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110:) is a program funded by the Office of Polar Programs of the
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Department of Earth, Environmental and
Planetary Sciences at
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194:
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Antarctic Meteorite Location and Mapping Project (AMLAMP)
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Meteorites, Ice, and Antarctica: A personal account
301:as possible destinations for future expeditions.
293:and a 4-member reconnaissance team that explored
275:was collected in the Allan Hills region in 1984.
16:Program funded by the National Science Foundation
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242:. Since 1976, ANSMET has returned over 20,000
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506:. Archived from the original on July 14, 2014
1361:Astronomy research agencies in the Antarctic
43:Location of meteorites collected across the
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25:
347:
345:
547:"Searching Antarctic Ice for Meteorites"
351:
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443:"2010-2011 ANSMET Field Season Report"
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342:
185:As of 2003, ANSMET had collected 8409
557:
471:, Cambridge University Press (2003),
31:Recovery of a meteorite in Antarctica
13:
461:
265:National Museum of Natural History
14:
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482:
378:"Meteorite Collection Statistics"
252:Smithsonian Museum Support Center
147:Australasian Antarctic Expedition
453:from the original on 2022-08-17.
74:Office of Polar Programs of the
37:
441:Harvey, Ralph (February 2011).
108:Antarctic Search for Meteorites
60:Case Western Reserve University
469:Meteorites, Ice and Antarctica
447:Antarctic Meteorite Newsletter
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413:
392:
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260:Lyndon B. Johnson Space Center
1:
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1356:Antarctica research agencies
449:. Vol. 34, no. 1.
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112:National Science Foundation
76:National Science Foundation
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1214:extraterrestrial materials
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524:: CS1 maint: unfit URL (
352:Cassidy, William (2003).
220:
81:
68:
51:
36:
24:
151:Novolazarevskaya Station
132:Transantarctic Mountains
120:Transantarctic Mountains
45:Transantarctic Mountains
1366:Meteorite organizations
993:Meteorites on Mars list
988:Martian meteorites list
325:Glossary of meteoritics
309:Serena Aunon-Chancellor
254:clean room facility at
248:Smithsonian Institution
171:Principal Investigator
1142:Nonmagmatic meteorite
330:The Thing (1982 film)
1209:Ca–Al-rich inclusion
467:William A. Cassidy,
289:) that explored the
232:Johnson Space Center
539:"Meteorites on Ice"
380:. NASA JSC Curation
291:Grosvenor Mountains
193:, in addition to a
70:Parent organization
21:
256:Suitland, Maryland
167:William A. Cassidy
157:geologists in the
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1335:Near-Earth object
1303:Atmospheric entry
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1168:Characteristics
944:Basaltic Breccia
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491:Official website
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971:Orthopyroxenite
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462:Further reading
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114:that looks for
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1256:Meteorites by
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1130:Obsolete terms
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675:Classification
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655:Micrometeorite
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483:External links
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295:Scott Glacier
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1313:Impact event
1294:
1069:Mesosiderite
983:Shergottites
956:Chassignites
921:Mare basalts
720:Carbonaceous
631:strewn field
510:November 16,
508:. Retrieved
503:
468:
446:
436:
424:. Retrieved
415:
403:. Retrieved
394:
382:. Retrieved
372:
353:
313:
306:
303:
284:
277:
269:
224:
184:
180:
141:
107:
103:
102:
1241:CI1 fossils
1137:Amphoterite
1121:Octahedrite
1116:Hexahedrite
823:Acapulcoite
750:C ungrouped
665:Parent body
589:meteoritics
205:meteorites
191:achondrites
128:flowing ice
1350:Categories
1182:weathering
1156:Mineralogy
1104:Structural
1079:Main group
1061:Stony-iron
863:Asteroidal
828:Brachinite
806:Achondrite
626:statistics
585:Meteorites
336:References
287:Don Pettit
244:meteorites
207:EETA 79001
201:, and the
197:meteorite
187:chondrites
177:Importance
124:Antarctica
116:meteorites
1330:Meteoroid
1295:See also:
1225:Patterns
1192:chondrule
1161:petrology
1074:Pallasite
966:Nakhlites
896:Howardite
886:Diogenite
853:Winonaite
843:Lodranite
815:Primitive
769:Kakangari
756:Enstatite
712:Chondrite
621:impactite
597:Meteorite
426:3 January
405:3 January
280:pallasite
199:ALH 81005
1298:Asteroid
1277:Journals
1204:Minerals
1197:presolar
1089:Pyroxene
976:ALH84001
949:NWA 7034
848:Ureilite
796:Rumuruti
774:Ordinary
703:grouplet
606:Glossary
520:cite web
451:Archived
384:14 April
319:See also
273:ALH84001
215:ALH84001
211:ALH77005
189:and 234
52:Location
1188:Grains
1111:Ataxite
936:Martian
891:Eucrite
876:Aubrite
871:Angrite
660:Notable
650:Largest
643:hunting
504:UA News
236:Houston
203:Martian
138:History
118:in the
93:/ansmet
87:caslabs
82:Website
1323:shower
1318:Meteor
1272:Awards
961:Kaidun
616:bolide
475:
360:
228:Teflon
221:Method
153:, and
104:ANSMET
20:ANSMET
1308:Comet
1250:Lists
1172:shock
1038:IIIAB
908:Lunar
838:IIICD
698:group
689:class
240:Texas
195:Lunar
159:Thiel
89:.case
1265:type
1159:and
1044:IIIF
1041:IIIE
1018:IIAB
1007:Iron
926:List
701:and
694:clan
685:type
638:Find
611:Fall
587:and
526:link
512:2005
473:ISBN
428:2014
407:2014
386:2011
358:ISBN
297:and
213:and
155:USGS
91:.edu
1177:TKW
1051:IVB
1047:IVA
1034:IIG
1029:IIE
1025:IID
1022:IIC
881:HED
833:IAB
683:By
599:...
234:in
1352::
1014:IC
789:LL
763:EL
760:EH
747:CV
744:CR
741:CO
738:CM
735:CK
731:CI
727:CH
724:CB
696:,
687:,
522:}}
518:{{
502:.
445:.
344:^
238:,
217:.
209:,
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577:e
570:t
563:v
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514:.
430:.
409:.
388:.
366:.
106:(
95:/
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