AHC: Delay the discovery of the Americas for as long as possible

How about a TL in which the European Christians win control over the Arab region, retaining full access to the Silk Road, and thereby negating the driving impetus behind naval trade between Europe and the Orient?

This impetus could also be denied if, instead, the Mongols conquered the entire Europe, devastated it as they did in Persian regions, and spreaded their influence as they did in China. Europeans would have an entire continent to explore, and wherever they went they would be received as part of the Mongol community and, maybe, as Muslims. Still, maybe they reached America by chance, especially when they were sailing around Africa (ships are better freight vessels than camel caravans) and reached Brazil by chance. The OP is about reaching the continent, so it would be done, but it's unlikely that they would show any interest in colonizing the region any soon.
 
While people are arguing over the specifics of how to delay the inevitable, I will come up with the exact point that the Old World will no longer be able to ignore the New. No matter how implausible it is (border-line ASB), if somehow the Old world hasn't found the New by this point, then the point that satellites that take images of the Earth's surface launch into space will be the moment the whole of the Old World finds out the New World. I can only imagine the shock.
 
While people are arguing over the specifics of how to delay the inevitable, I will come up with the exact point that the Old World will no longer be able to ignore the New. No matter how implausible it is (border-line ASB), if somehow the Old world hasn't found the New by this point, then the point that satellites that take images of the Earth's surface launch into space will be the moment the whole of the Old World finds out the New World. I can only imagine the shock.

This would make intresting ASB TL. Or has anyone made such?
 
Of course the earlier the PoD the later it would happen. (One could exaggerate and suppose the meteor does not fall and kill the dinosaurs, but that would be too much of a stretch.)
Realistically, if the Muslims had defeated Charles Martell the entire Middle Ages would be different, so although it's hard to say for how long this could be delayed (or anticipated, since everything would be different), it would probably happen later, especially if the question refers to European colonization.
No. An earlier POD could make the discovery SOONER. Look at Muslim conquests and exploration and trade, a Muslim take over of Europe can mean that a Muslim Europe is discovering America sooner. Not later. And the idea that it wouldnt be "Europe" if it was Muslim doesn't hold water in my opinion, India is India throughout time regardless of Buddhist, Muslim, or Hindu rulers, same with Iran is Iran/Persia regardless of religion, and same with Egypt.
 
Antilla was based on the idea that Hispanic emigrants sailed west fleeing the initial Muslim conquest, found a large island, settled it with seven cities (of Cibola! One fore each fleeing bishop - This is the origin of the legend), and that *one* small group sailed back a generation later to tell of it. Antilla appears on Portolean maps by the 1420s and is very curious as it looks like one of the larger Antilles islands, especially if tuned 90 degrees, moreso when combined with other smaller islands nearby. For extra kicks look up the names and *distinct languages* of Hispanola before the conquest, including one that matches nothing nearby and was found only in one area of what is now the northern Dominican Republic.
 
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