Talk:Compton–Belkovich Thorium Anomaly/Archive 1

Archive 1

References

• Lawrence, D. J. (2003). "Small-area thorium features on the lunar surface". Journal of Geophysical Research. 108. doi:10.1029/2003JE002050.
• Lawrence, D. J.; Feldman, W. C.; Barraclough, B. L.; Binder, A. B.; Elphic, R. C.; Maurice, S.; Miller, M. C.; Prettyman, T. H. (2000). "Thorium abundances on the lunar surface". Journal of Geophysical Research. 105: 20307. doi:10.1029/1999JE001177.
• Jolliff, B. L.; Wiseman, S. A.; Lawrence, S. J.; Tran, T. N.; LROC Science Team (2010). "Scientific Return from Systematic Imaging of the Constellation Exploration Sites: Compton-Belkovich Example". 41st Lunar and Planetary Science Conference. 41: 2412. Bibcode:2010LPI....41.2412J.
• Lawrence, D. J.; Elphic, R. C.; Feldman, W. C.; Gasnault, O.; Genetay, I.; Maurice, S.; Prettyman, T. H. (2002). "Small-Area Thorium Enhancements on the Lunar Surface". 33rd Annual Lunar and Planetary Science Conference. 33: 1970. Bibcode:2002LPI....33.1970L.
• Jolliff, Bradley L.; Wiseman, Sandra A.; Lawrence, Samuel J.; Tran, Thanh N.; Robinson, Mark S.; Sato, Hiroyuki; Hawke, B. Ray; Scholten, Frank; Oberst, Jürgen (2011). "Non-mare silicic volcanism on the lunar farside at Compton–Belkovich". Nature Geoscience. 4 (8): 566. doi:10.1038/ngeo1212.
• Warren, Paul H. (2001). "Compositional structure within the lunar crust as constrained by Lunar Prospector thorium data". Geophysical Research Letters. 28 (13): 2565. doi:10.1029/2000GL012739.
• Lawrence, D. J.; Feldman, W. C.; Barraclough, B. L.; Binder, A. B.; Elphic, R. C.; Maurice, S.; Miller, M. C.; Prettyman, T. H. (1999). "High resolution measurements of absolute thorium abundances on the lunar surface". Geophysical Research Letters. 26 (17): 2681. doi:10.1029/1999GL008361.

•  Done - implimented. --Tomtomn00 (talk • contributions) 09:21, 11 May 2012 (UTC)

Ref 6 , Jeffrey J. Gillis and Bradley L. Jolliff (2008)., is incomplete. Where published, etc.? Ref 4 HERO course stuff, is this a WP:RS? Vsmith (talk) 12:36, 11 May 2012 (UTC)

•  Done per following; Ref 4: I would class it as reliable, as it is a journal & Ref 6: Removed - Now a doi from Nature Geosciences journal. --Tomtomn00 (talk • contributions) 12:57, 11 May 2012 (UTC)

"Course Hero (Membership Required)". Course Hero. Retrieved May 10, 2012 Is this a credible source? What does the text say? Is it necessary if you have all the journal articles?--Stone (talk) 17:26, 11 May 2012 (UTC)

•  Done - Replaced with better copy from another site. --Tomtomn00 (talk • contributions) 17:40, 11 May 2012 (UTC)

• Journal articles: they do not all outline the same things, and are needed. --Tomtomn00 (talk • contributions) 17:45, 11 May 2012 (UTC)

Pre-review

• ppi looks like a strange unit to me it is more likely to be parts per million (ppm) --Stone (talk) 17:23, 11 May 2012 (UTC)

• ppi stands for 'pixels per inch'. See this. --Tomtomn00 (talk • contributions) 17:33, 11 May 2012 (UTC)

Right! But this was not the question. What does a concentration of 40 ppi mean? A concentration is normally measured in g/l or g/kg or ml/l or something like that. When you know the two unites are the same the final concentration is without a unit so 0.5 kg/kg is 500000 ppm. I saw this remote sensing data on a lot of conferences, but not with ppi but ppm. Is there a reference to quote the ppi from?--Stone (talk) 17:47, 11 May 2012 (UTC)

•  Done - Removed sentance, couldn't find source. --Tomtomn00 (talk • contributions) 18:00, 11 May 2012 (UTC)
• largest impact craters on the moon? When I look into List of largest craters in the Solar System and at for example the Compton (crater) article this seems a wrong statement.--Stone (talk) 17:36, 11 May 2012 (UTC)

•  Done - Removed that when I changed reference to the better one. --Tomtomn00 (talk • contributions) 17:41, 11 May 2012 (UTC)

date?

The first paragraph says it was discovered in 1988 but then the next chapter says Lunar Prospector in 1999 which is probably more accurate, even the first reference has no date earlier than 1999. But I didn't find yet a certain date of discovery Hoemaco (talk) 08:21, 13 May 2012 (UTC)

 Done - Read this — 1998. --Tomtomn00 (talk • contributions) 08:46, 13 May 2012 (UTC)

Lunar rock samples?

The introductory paragraphs state "Lunar rock samples from the Compton–Belkovich Thorium Anomaly reveal that most volcanism occurred around 3 to 4 billion years ago ...".

It is highly doubtful that rock samples have ever been taken from the anomaly itself. All of the Apollo missions were on the bright side of the moon, as were robot-missions to the moon. I suspect that the rock samples referred to are those from various regions of the bright side, taken by Apollo astronauts in the 1960s and 1970s. Although the cited reference seems legitimate (I don't have access to it), I seriously doubt that it supports the contention this contention. Truthanado (talk) 11:34, 13 May 2012 (UTC)

Changed that rather obvious error. Vsmith (talk) 11:54, 13 May 2012 (UTC)

GA Review

This review is transcluded from Talk:Compton-Belkovich Thorium Anomaly/GA1. The edit link for this section can be used to add comments to the review.

Reviewer: Grapple X (talk · contribs) 22:14, 12 May 2012 (UTC)

GA review – see WP:WIAGA for criteria

1. Is it reasonably well written?

   A. Prose quality:

   I'm not convinced about the presentation of the subject's name—unless this is a proper noun it should be "Compton-Belkovich thorium anomaly", which is how it's presented in ref 2; though ref 7 uses "Thorium Anomaly". Which is more prevalent in the sources?

   Regardless of casing, I believe the hyphen should be replaced with an en dash (one of "–" these), as the title indicates a land range between two points (in terrestrial terms, think Uganda–Tanzania War or Mason–Dixon Line).

   Inline citations should follow either a word or punctuation mark without a space, then be followed by a space themselves. Ref 1 is done correctly, but you'll need to look at 2, 3, 5, etc.

   You have a "could've" in there - expand all contractions unless they're part of a quotation.

   "The estimated thorium concentration reaches 5.3 µg/g" -> the first time this measurement is used, perhaps explain it in brackets afterwards; as "... reaches 5.3 µg/g (5.3 micrograms per gram)", the use of mu as a symbol isn't layman-friendly. Might also be worth comparing this to the level of thorium's abundance in the earth's crust.

   B. MoS compliance for lead, layout, words to watch, fiction, and lists:

   The first paragraph under "Description" would really fit better in the "Location" heading.

   Another point I'm noticing here; there's citations used in the lead that aren't used in the article body—move the actual cites down to the body text, adding in anything that's not mentioned again, and remove the citations from their place in the lead.

2. Is it factually accurate and verifiable?

   A. References to sources:

   B. Citation of reliable sources where necessary:

   C. No original research:

   Reliability of refs is fine, and there's a good amount used. Refs 1, 2 and 3 seem incomplete though—ref 1 should have a publisher, 2 needs a publisher and accessdate, and 3 needs an author. 3 also uses "pp." for a single page, this should just be "p.". Ref 6 needs an author, and ref 13 needs a publisher and accessdate. Publishing dates aren't always available but if you can find them for website refs that don't have them, it'd also be a plus.

3. Is it broad in its coverage?

   A. Major aspects:

   B. Focused:

   I'm not really seeing much about this being a thorium anomaly so much as a volcanic region; my understanding would be that a region rich in thorium would also have radioactive properties which aren't mentioned here.

   Overall, the length is a bit on the short side but I think with the material that's here it could easily be expanded—things like "identified by a Clementine Visible Images study that was carried out later" could be quickly expanded to "identified by a visible imaging study that was carried out later by the Clementine spacecraft" with a brief aside (maybe a sentence and no more) on the timing and intention of Clementine. Other things you could clarify for added length might be the "Procellarum KREEP Terrane" (I had to follow a few links to figure out what "KREEP" was), or why the Moon's orbit could cause volcanism to be dated to one million years ago and not three or four.

   Also, not vitally important but I'm curious—have there been any relevant studies on the Moon's background radiation? An anomaly like this would likely feature in one; and I know that one of the reasons for Project A119's cancellation was that it would interfere with possible future radiation studies.

4. Is it neutral?

   Fair representation without bias:

   Grand.

5. Is it stable?

   No edit wars, etc:

   Fine.

6. Does it contain images to illustrate the topic?

   A. Images are copyright tagged, and non-free images have fair use rationales:

   B. Images are provided where possible and appropriate, with suitable captions:

   Images seem okay. I'd move the coloured one to the left rather that keeping it on the right, though.

7. Overall:

   Pass or Fail:

   This is an interesting article, but it definitely needs some work. I've listed a good bit of improvement that could be made but I'd be happy to help out with some of this if you'd like, as this seems an intriguing topic. GRAPPLE X 22:14, 12 May 2012 (UTC)

   The changes here look good, the little extra length helps more than you'd think. I'd say this is a pass for now, but it'd still take some expansion if you wanted to take it further than this. Well done! GRAPPLE X 15:08, 13 May 2012 (UTC)

Wrong numbers

Earth's conentration of Thorium is much higher, about 12 ppmw I believe. 109.90.224.162 (talk) 09:21, 14 January 2016 (UTC)

I am unable to interpret this: "It only appears when there is the highest amount of concentrated Thorium possible."

Lfstevens (talk) 20:09, 10 May 2012 (UTC)

• Removed the random sentance. Barnstar on your talk page. --Tomtomn00 (talk • contributions) 20:20, 10 May 2012 (UTC)

I've done some further copyediting work, mainly on the citations. Allens (talk | contribs) 04:02, 29 May 2012 (UTC)