Talk:Compton–Belkovich Thorium Anomaly/Archive 1

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)


 * ✅ - 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)
 * ✅ - 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)
 * ✅ - Read this &mdash; 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)

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 &#124; contribs) 04:02, 29 May 2012 (UTC)