That's not how i read it. The geological process making such a deposit possible alters the limstone in a way it it no longer reacts.
This applies to the Carlin Trend type deposits. They are a rather distinct type of Au deposition in Limestone, in which the reaction occurred as I stated in my reply to the Vinegar test.
Yggdrasil, you do not need to completely dissolve the Limestone to see if there is any Au contained. Even if there was, you would not notice it, unless you had a scanning electron microscope. If you removed 100% of the Limestone ,Leaving only 2 - 3 grams, per top, of atom sized particles, most being much smaller than a nanoparticle. The Au is literally deposited in 1 atom particles, up to multi particle clusters resembling a grape cluster, but still maybe only a 10 atom cluster. Still impossible to see with even a 1000 power microscope. It shows up in a fire assay, but you will find zilch in a very rich pan. This is why it was not discovered, until I believe, the 1950's.
There are very few occurrences, if any, of visible Au in Limestone, in the entire world, as we currently understand geology. New discoveries are still being made. The world is not flat, but it took a long time to convince the majority. I have heard some people claim, to this day, the world is flat, and it is only around 7,000 years old.
Back to Au in Limestone in Florida. I don't know how many watch the show " Bering Sea Gold ". You will notice that the Au washed to the beaches, and deposited off shore, contains sand to cobble size aggregate.If the Florida Au in Limestone was a viable alluvial deposit, it should contain some of the aggregates associated with the outwash material from it's source. I saw no course sand, or aggregate in the photos submitted. But once again, some of those photos should have been deleted, while the best ones still are not up to the necessary quality desired, for at least a reasonable guess.
I suppose you could get a deposit in say, a large inland lake, like The Great Salt Lake. Au in the sea may contain a 1 part per billion, or less. But a huge land locked part of the sea, through uplift, and evaporation, could theoretically concentrate the sea water, to a brine containing much salt and elevated quantities of Au. This is something for a bright, energetic person like 2323tonyt. He could spend the rest of his life studying the possibilities and orogeny of such deposits. Who knows, with dwindling higher grade deposits depleted, we may eventually end up mining salt deposits for its Au
Long story short, if you want an answer in this lifetime, get it assayed. You are about to make my head explode. Please make the voices go away.