Posted by & filed under 2012 / 2013 Field Season.

Andrew Beck, December 29th, Larkman Nunatak

We collected 44 meteorites today, the most we have collected in a single day this year! Today’s collection site was the same as the previous few days, the youngest in a sequence of end moraines at the base of Larkman Nunatak. A picture from the top-center of this moraine looking NW is shown in the post. The moraine curves to the NW at both the left and right side of the picture indicating that the glacier that formed these end moraines was receding from the SE to the NW, or directly away from the camera. The glacial activity that sculpted this area happened a long time ago, so only topographic features formed by the glacier remain and not the glacier itself. Moraines are depositional features, but glaciers are erosional as well. Though it as not too apparent in the picture, there is a large depression just beyond the moraine in the blue ice, much of which is reflecting sunlight. This depression is likely an erosional feature that was caused by repeated glacial advance and retreat across this area.

The glacial features we see at Larkman are reminiscent of the sequences of end moraines trailing into the Great Lake basins around areas like Saginaw, MI and Toledo, OH just to name a few, though the features at Larkman Nunatak are on a much, much smaller scale. Seeing interesting geologic features like those at Larkman and at Mt. Bumstead have been a rewarding and mostly unexpected perk for a lot of the team. We have enjoyed discussing these features both in the field and in camp to aid in our plans for meteorite collection. Here is hoping these discussions continue and help us to have more record days!

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Tom Sharp, Dec. 27

It was Christmas Eve for ANSMET G-058 and the wind was really blowing. You could hear the drifting snow hitting the side if the tent. I had trouble getting to sleep, listening to the constant sounds of small ice crystals impacting the tent next to my head. I awoke to the sound of my tent mate checking in with McMurdo and making coffee. Soon, Jim, our science lead, was there discussing the plan for the day. It was clear, cold and windy with drifting snow. The decision was made to search a moraine in the morning and then return for lunch with enough time to do an outreach event and get the Christmas dinner started. Christmas had been postponed because our resupply flight was delayed until Dec. 26. We were excited to collect meteorites on our Christmas morning and then celebrate with special Christmas dinner. Moraines are regions of a glacier that accumulate rock, either along the edges or at the ends of ice lobes. The moraine that we searched was one of a sequence of end moraines. Searching moraines is hard work because there are so many rocks to scan over. The temperature was -17 C, about normal, with a wind that blew up to 25 knots. Under these conditions, you can’t expose skin to the wind. We walked upwind to the top of the moraine and then searched back down with the wind at our backs. We found and marked 15 meteorites and decided to quickly collect them before returning to camp. As we collected, people kept finding more meteorites. The best of all was a beautiful black and shiny sample that may be an achondrite. By the time we were done, our Christmas morning had given us 19 meteorite presents. We were excited to do some outreach and share our adventure with the public. With help from home, one of our team members had posted something about meteorite hunting in Antarctica on a web news site. This generated a lot of interest and questions. At 1:00 PM, we did a question and answering session from the ice with some help from the spouse of a team member. We all gathered in the science tent to answer a series of questions about our expedition and the importance os meteorite research. After the outreach event, we started preparation of our Christmas dinner, which included a turkey. We all prepared dishes and met back in the science tent at 6:00 PM. We began the festivities with mulled cider and appetizers. The turkey took a bit longer than expected, but that was fine. We enjoyed being together telling stories in a warm crowded tent that smelled of turkey and cider. The turkey dinner, with the usual trimmings, was fantastic. After dinner, we exchanged small Christmas gifts from each other and from friends of ANSMET. The evening ended with a couple of fine deserts and some friendly games of Yahtzee. What a great Christmas indeed.

Larkman Nunatak moraine

 

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Tomoko Arai, Recon team, 28th December 2012, South Graves icefield

Unfortunately, we are still stuck in the wind storm here. We have been here for ten days and could only go out to meteorite search for just a total of several hours! We heard good news from the main team though that they have now got about a hundred meteorites so far, we feel happy for them, but at the same time, are a bit nervous thinking when we can get out of here and search for meteorites in a good weather. To make use of our tent-bound time, Katie and I washed our hair today. It was quite refreshing since we have not washed hair for two weeks. Having refreshed hair and mind, we are very ready for moving to the next campsite. Keep finger crossed for possible moving tomorrow!

Katie goes Hollywood

 

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Katie Joy、Recon Team, 27th December 2012, Graves Icefields

Predictably today the katabatic wind is still blowing hard from the south at about 30-35 knots preventing us from moving campsite to a new icefield, and once again we have been tentbound. It is incredibly frustrating to not be productive, but we have been occupying ourselves sleeping, eating (lots of eating) and reading to fill the time so not to go loopier than we already are (see the funky glasses photo from Christmas day as proof of our increasing bonkersness!). As my PC died a few days back I have been digesting a biography of the Norwegian arctic explorer Fridtjof Nansen, who was the first to lead an expedition across Greenland and led the trail for the early Antarctic explorers Amundsen, Scott and Shackleton. What a change in technology between now and then – thank goodness for not having to eat a daily ration of pemmican (mix of dried meat and fat) – Tomoko and I had tasty steak and mashed potatoes for dinner tonight cooked on our propane stove.

As there is little to report on the meteorite searching front, I thought I would postulate on a type of meteorite that would be incredibly scientifically interesting to find – a piece of the planet Mercury. Mercury is the smallest planet in the Solar System (0.05 of the Earth`s mass) and closest to the Sun. The planet has differentiated with a very large dense metallic core (perhaps up to 75% of its radius) and a correspondingly thin crust. Mercury was visited by NASA`s Mariner 10 flyby mission, and is currently being mapped in detail by NASA`s MESSENGER mission and will be visited in the 2022 timeframe by the European Space Agency`s BepiColumbo mission.

Mariner and MESSENGER have revealed that Mercury`s surface has been heavily cratered by impact events, and that younger volcanism has covered some regions (notably the northern plains) with lava flows. We are learning a huge amount from these orbital missions, but it would be incredibly useful to have a piece of the planet Mercury we could study in our labs to determine its precise age, mineralogy, chemical makeup and isotope abundance. For example, such studies may reveal if the planet was formed in its current orbit close to the Sun, or if it is a body that was formed elsewhere in the Solar System and wandered in to its present location. Testing these scientific hypotheses are important for informing us how planets and Solar Systems form and evolve through time.

Could there be pieces of Mercury here on Earth as a meteorite? Although it is dynamically difficult for impact ejected pieces of Mercury to be thrown into an Earth-crossing orbit that would allow it to fall here as a meteorite – according to some computer models it is not impossible, and, therefore, there is a chance (albeit a small one) that there is a piece of Mercury out there somewhere waiting for us to find in Antarctica.

So how could we identify a piece of Mercury? Results of the MESSENGER mission X-ray fluorescence spectrometer (XRS) and gamma-ray spectrometer (GRS) have given us great insights to the chemical composition of the upper surface of Mercury that can be used to match with new meteorites that we find. We now know that Mercury`s surface is not chemically similar to the Moon in terms of aluminium or potassium. The XRS instrument also showed that the planet`s surface is poor in iron and titanium, but has some sulphur present – suggesting that these rocks were formed under low oxygen conditions. Also Mercury`s crust has relatively high Mg/Si ratio – and is compositionally similar to a type of magnesium-rich lava known as komatiite that flowed on the early Earth. It is also similar to some meteorites that have large amounts of the magnesium-rich mineral enstatite, although there is not a perfect compositional match with any of these samples. Thus, Mercury`s surface appears to have a unique chemistry that is distinct from most known meteorite groups and other planetary surfaces. Therefore, if we can find a meteorite that matches these compositional constraints – there is a good chance that we have a piece of the planet Mercury available to study in more detail here on Earth.

With all the bad weather the recon team have been having – we are due some better fortunes, and perhaps a mercurian meteorite is awaiting us at the next icefield?!

PS. We hope that if you in the middle of writing an LPSC abstract it is going well.

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Tomoko Arai, Recon team, 26th December 2012, South Graves icefield

Again, today the recon team were tent-bound, lying in our sleeping bags all day due to the strong katabatic wind storm that picked up in the night. It has been blowing whole day with winds from the south driving small snow and ice particles along up to about a meter in height (see photo), which make travelling outside very unpleasant. Since we are planning to move to an area close to the North Graves icefield tomorrow, it would have been the last day for us to search meteorites here in South Graves icefield and it has been frustrating not to be able to get out to work. We were able to go out for meteorite search only for part of three days among totally eight days of our stay here. We hope to get out of here soon, and want to find lots of meteorites in the next target site where we have nice weather hopefully.

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Systematic Team, Larkman Icefield, Antarctica

Thanks to all those following our activities here in Antarctica – by popular demand we’re going to do a question and answer session on Reddit. Tune in to the “Ask Me Anything” session from 7- 8 pm (Eastern Standard Time) on Boxing Day (Dec. 26)!

Want to know why we’re hunting for meteorites in Antarctica? How many we have found? Or perhaps, how we’re celebrating Christmas ‘on the ice? Now’s your chance to ask!

We’ll post the link to the session on this blog site before it begins.

Happy holidays from the 2012-2013 ANSMET Systematic Team!

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Stan Love Larkman Nunatak camp 2012 December 26

On the International Space Station, the arrival of any visiting vehicle is a big event. The same is true in a field camp in Antarctica.

Today a ski-equipped Twin Otter airplane delivered the remainder of our fuel and supplies that the LC-130 Hercules had dropped off back at Otway Massif at the beginning of the season. There was too much weight and volume for us to put all of it on sledges and tow it to Larkman on our skidoos. Originally the Otter was supposed to come on December 22, in time for Christmas, but shifting priorities delayed it until today.

The Otter brought us several drums of fuel for the skidoos, which was good because we’ve used most of what we brought with us on the sledges. We are putting about 20 or 30 miles a day on the skidoos as we search for meteorites. (Yesterday the mileage seemed especially worth it: we got 15 new meteorites, some of which weighed over a kilogram.) We also got a dozen fresh bottles of propane for our stoves, which we rely upon for heat, cooking, and melting ice for water.

Three more items were especially looked forward to. First was the mail. Many of us received letters and holiday cards which were very much appreciated. Next was the equipment we’ll need to search for meteorites on foot in dense rocky moraines, which are not accessible on snowmobiles. Finally, we were happy to receive our camp oven. We’ve planned a holiday feast that includes a whole roasted turkey. The bird is defrosted and ready to cook, but even the most ambitious cook would not attempt to roast a turkey on a little propane burner. With the oven in camp, we’re ready to roast, and our big holiday celebration is on tap for tomorrow.

As appreciative as we are for the Otter pilots and crews for the things they bring, we are even more grateful for what they take away: empty fuel containers, bags of trash, and sealed buckets from the latrine, helpfully labelled “Human Waste.” We definitely get the best of that trade!

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Rob Coker, Larkman Nunatak, December 25, 2012

The public tale of the 2012-2013 ANSMET Expedition, funded by various Institutions interested in acquiring Knowledge for its own sake, has been told elsewhere, most prominently in our public wireless reports.  Here, today, with the last vestiges of my humanity and sanity in tatters, I feel compelled to tell the real story about the events that have taken place here on the aeons-old windswept Antarctic plateau, before it is too late.  I am reluctant to tell my tale, since I know my story will likely not be believed, but I must rely upon the judgement of the dear reader.
As previously reported, we camped here in the Larkman region to find pieces of the heavens themselves that have fallen from the sky and been buried for untold ages in the dead ice beneath us, only filled area.  Surrounding us, and exuding waves of menace, are the tops of various monstrous mountains of antiquity.  It is a land of stark and deep, almost mind-numbing, emensity, which, from the start, also invoked in me, for no evident reason, feelings of dread and emptiness. If only I had listened to those vague feelings and fears!  When I arrived here, I was reading The Worst Journey in the World, in an attempt to learn more of this merciless land that I was planning on spending months getting to know.  As the days went by, I instead used the tale to feel better about our harsh conditions, which, though harsh, are far better and easier to endure than those which the early explorers experienced.  Or so I thought.  For example, I have been haunted by the howling winds
that never stop, streaming North from the Pole, filling our tent with what sounds like the eerie cries of the long damned, while drawing the life from our skins and producing the dead flesh of frost nip in mere minutes.  This cold wind also drives hard crystals of snow against all of our sledges and tents and transport, leaving long deep drifts that we easily stumble into when the light gets cold and flat, as it often does, when clouds blot out the sun. Wraithlike streamers of such flowing crystals move across the blue ice in formations that defy description, etching and cutting all they touch; they are like ghost fingers searching for and draining any spark of life and heat they can find.  We try hard to lessen our impact on this dreadfully dry and crushingly cold environment, but the heat of our stoves and of our very bodies cannot be hidden from the denizens that lurk here.  And they are jealous of such warmth.  And they do not wish to be disturbed.  But, unwittingly, disturb them we have.

In the 100 years since Scott’s fateful jorney to the Pole, some things have changed considerably, such as this wireless means of communication, while other things, such as our sledges and tents, are virtually identical to those used by that doomed Expedition. Upon finishing that tale of noble and desparate deeds, I felt a compulsion to read next a story by H.P. Lovecraft, set here in the desolate and deserted Antarctic continent. While reading it, feelings of deja vu overwhelmed me.  Suddenly, my very rational tentmate, who has been further than all but a mere handful of other human beings and seen much, quietly stated, “You know what is better than reading Lovecraft’s ‘At the Mountains of Madness’ while being in Antarctica? Reading Lovecraft’s ‘At the Mountains of Madness’ while being in Antarctica with blood dripping from the ceiling.”  And indeed that was happening!  It suddently all fell into place as the steak blood dripped onto our clothing, our utensils, our flesh.  Surely we were in the fabled plateau of Leng, as described in the Necronomicon, written by the mad Arab Abdul Alhazred, where the eldritch Deep Ones slumber the long cold slow sleep of death.  The blasphemous descriptions of the Mountains of Madness matched our surroundings perfectly.  I trembled, eager to inform my companions at our next get-together in the Science tent, for we should abandon our quest for the Star Stones, for they are the sporous offspring of the Old Ones.  My colleagues laughed and jested at me, singing and carrolling until the late hours.  They know not what they have summoned with their crazed verses!

This Christmas day, our stockings are empty — not even coal to heat ourselves! — and no presents are to be found.  Santa could not find us in this aeons-cursed land.  Did this convince my companions?  Of course not.  Finally, it dawned on me in growing horror:  The very water we have been drinking, melted from the ice beneath us, contains tiny fragments of star stones, the spores of the Deep Ones, and we have been inbibing them for weeks!  Nurtured in our bodies, they have filled us with the urge to find more and greater examples of their spawn and return them to our so-called Civilization.  I can only shudder at what Horrors and Truths will hatch from them.

Humanity will always explore and seek Knowledge, so I know others will come here and fall under the same curse that we have, no matter what I write here today.  I shiver at what the final result may be. But the Truth had to be told.

Happy Holidays to All!

*B*:  The cat is in the kitchen. Repeat:  the cat is in the kitchen. 0800NZT. ES22:  thermal HW problem:  Scott tent with Coleman stove.  Find time-dependent solution with 0F floor. (and I’m not afraid of purple monkeys…blueballed ones on the other hand…)
Other texting homies (of which I have more than everyone else combined!):  I can feel the luv!

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Recon team, 25th December, 2012, South Graves Glacier

Happy Christmas! The wind and snow blowing dropped a little today allowing the recon team to get out for a few hours this Christmas afternoon at South Graves Icefield. We collected the two meteorites that we had found a few days back, and found and bagged four more for Christmas cheer. The wind made collecting pretty cold and we were forced back to camp around 4 pm, though it was really good to get out again after a frustrating few tent days. Woohoo! We are hopeful to finish off searching the icefield tomorrow before a planned camp move the day after on the 27th. This evening the four of us got together in John and Joe`s tent and had a Christmas meal and exchanged presents. We also had been sent some gifts from the main team (see the photo for the amazing new eyewear we will be wearing for the rest of the season) and the people at JSC which was lovely – thanks to everyone who has been thinking of us, we really appreciate it. Seasons greetings from us all.

From John: After a nice Christmas meal we have opened the gifts and are thankful for all our friends and family and the privilege of being here in this special place.

From Katie: Hope you are all having a good holiday. We have eaten well and had a festive evening with good cheer and present exchanges. Thanks to the JSC folks for sending the treats. Thanks also to people who have sent us cards and pressies. Daphne – thank you so much for the lovely note, and Alexander and Elliott for the great Christmas cards, festive badges and the terrible jokes ;) Joys – lovely to speak to you all on the phone, I miss you all very much.

From Tomoko: Merry Christmas to all! We had a great day finally going out finding meteorites, and having a joyful Christmas dinner. Thanks so much to the people of the main team and the JSC for the wonderful gifts.  念願叶ってテント生活から解放され、二日ぶりに隕石探査ができました。強風の中、6個の隕石を採取でき、最高のクリスマスになりました。 みなさまも素敵なクリスマスをお過ごしください!

the height of fashion