Ceres Geology |
Ceres Geology |
Dec 6 2017, 11:45 AM
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#61
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Senior Member Group: Members Posts: 1452 Joined: 26-July 08 Member No.: 4270 |
Describing what are obviously craters as "small conical hills" ... maybe this paper is a better fit for viXra.org instead.
-------------------- -- Hungry4info (Sirius_Alpha)
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Dec 6 2017, 01:49 PM
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#62
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Junior Member Group: Members Posts: 41 Joined: 11-April 07 From: London, U.K. Member No.: 1957 |
Is this a joke? https://arxiv.org/ftp/arxiv/papers/1712/1712.01320.pdf I get that its a preprint archive and all that, but....sheesh P This is great - perhaps one of the most endearingly mis-guided and unintentionally hilarious things I've seen in a while. It actually has the line, "Those beauties are really in the eyes of a beholder." on page 4. Figure 39 nearly made me spit coffee over my keyboard. But if you think that garbage only appears in arXiv, try this paper of dubious statistical quality, which I have to assume was peer reviewed by an actual human being... https://www.nature.com/articles/s41598-017-13355-7 |
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Dec 7 2017, 12:01 AM
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#63
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Senior Member Group: Members Posts: 4256 Joined: 17-January 05 Member No.: 152 |
Is this a joke? https://arxiv.org/ftp/arxiv/papers/1712/1712.01320.pdf I get that its a preprint archive and all that, but....sheesh I don't follow the earth and planetary subject area, but the main physics/astro/cosmo areas are extremely well controlled and a paper like this would not get through. This author hasn't appeared on the arxiv before so would've needed endorsement, which I think is more or less automatic if you have an email address from a known institution. His email address is from the Nauchno-Issledovatel'skiy Fiziko-Khimicheskiy Institut Im. L. Ya. Karpova so that may have let him in easily. But that's a chemistry institute so it's unclear if he has any planetary science training. The postings are also supposed to be moderated and he's clearly slipped through that net. |
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Dec 7 2017, 03:50 AM
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#64
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Member Group: Members Posts: 716 Joined: 3-January 08 Member No.: 3995 |
Well that was painful.
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Dec 7 2017, 04:35 AM
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#65
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Member Group: Members Posts: 159 Joined: 4-March 06 Member No.: 694 |
I very rarely post anything here apart from me giving valuable money to keep this wonderful site alive and running.
Even former editors of peer reviewed journals have said that up to 40% of all stuff that appears in peer reviewed journals are either of very poor poor quality or even worse a lot of the medical science stuff that appears cannot be re-produced by future research or was constructed is such a way to make the re-production of prior results all but impossible. -------------------- I call heaven and earth to witness against you this day, that I have set before thee life and death, the blessing and the curse; therefore choose life, that thou mayest live, thou and thy seed.
- Opening line from episode 13 of "Cosmos" |
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Dec 7 2017, 08:22 PM
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#66
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Senior Member Group: Members Posts: 4256 Joined: 17-January 05 Member No.: 152 |
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Dec 8 2017, 12:04 AM
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#67
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Member Group: Members Posts: 866 Joined: 15-March 05 From: Santa Cruz, CA Member No.: 196 |
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Mar 15 2018, 02:36 AM
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#68
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Senior Member Group: Members Posts: 2106 Joined: 13-February 10 From: Ontario Member No.: 5221 |
Newly published results showing quite a bit of activity on Ceres as it nears perihelion (next month). More ice in shadowed areas, and detection of calcium carbonate on Ahuna Mons: https://www.jpl.nasa.gov/news/news.php?feature=7081
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Mar 15 2018, 03:22 AM
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#69
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Merciless Robot Group: Admin Posts: 8785 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Have to wonder if this is partially endogenic, though I can't think of a mechanism unless Ceres is somehow unusually rich in core radioactives. However, since these phenomena appear to coincide with perihelion, a more pertinent question is why Ceres looks so much like a rather ordinary rocky small body dominated by cratering given how fast-acting some of these processes may be.
Volatile deposits may be isolated and widely dispersed, the regolith may vary substantially in thickness, the thermal properties of surface and near-surface materials may vary, all or none of the above. A great many possibilities and questions spring to mind; be fun to see how the pros weigh in. -------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Mar 15 2018, 04:44 PM
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#70
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Senior Member Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 |
On Ahuna Mons, I wonder how intricate the dynamics of downslope mass movement might be. It seems to have been most recently "groomed" by downslope movement, which could mean one single 360° event or a few, or a more or less ongoing process. Perhaps impacts/quakes trigger new flows. And then what is exposed to the surface could be overturned depending on the structural mechanics, and what we see in vis/IR spectroscopy may be a superficial covering that isn't representative of the rest of the structure. This wouldn't require active endogenous geology, if impacts are triggering avalanches, though it doesn't exclude active geology, either.
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Aug 5 2018, 05:30 AM
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#71
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Member Group: Members Posts: 316 Joined: 1-October 06 Member No.: 1206 |
A Possible Brine Reservoir Beneath Occator Crater: Thermal and Compositional Evolution and Formation of the Cerealia Dome and Vinalia Faculae
[Abstract] https://www.sciencedirect.com/science/artic...019103517306371 P |
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Jun 15 2019, 01:57 AM
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#72
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Member Group: Members Posts: 866 Joined: 15-March 05 From: Santa Cruz, CA Member No.: 196 |
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Dec 28 2019, 07:46 PM
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#73
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Member Group: Members Posts: 437 Joined: 14-December 15 Member No.: 7860 |
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Aug 10 2020, 07:11 PM
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#74
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Member Group: Members Posts: 293 Joined: 22-September 08 From: Spain Member No.: 4350 |
There's some new papers on Ceres
"Recent cryovolcanic activity at Occator crater on Ceres" https://www.nature.com/articles/s41550-020-1146-8 "Evidence of non-uniform crust of Ceres from Dawn’s high-resolution gravity data" https://www.nature.com/articles/s41550-020-1019-1 |
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Aug 11 2020, 08:39 PM
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#75
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Member Group: Members Posts: 100 Joined: 30-November 05 From: Antibes, France Member No.: 594 |
Excellent news regarding the salts of Occator Crater!!!
One may assume that for small planetary bodies like Ceres, the volatiles like H, O or H2O should have vanished into outer space over geologic time scales. But curiously, we see here what seems to be the remnant of a subsurface layer or pocket of a water-dominated liquid. And no tidal forces engendered by a large planetary body... Eager to see a rover in Occator Crater! |
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