为什么海底充满宝贵的财富 How the Ocean Floor Got Filled with Riches

未能成功加载,请稍后再试
0/0

Thanks to Brilliant for supporting this episode of SciShow.

Go to Brilliant. org/SciShow to check out their Knowledge and Uncertainty course.

Underneath kilometers of seawater, the ocean floor is full of riches.

There's gold, iron, and lots of other rare, precious metals.

And no, it doesn't have anything to do with pirates.

All this treasure is the result of millions of years of geochemical processes that have been steadily filling the seafloor with loot.

Some of the most impressive deposits grow at hydrothermal vents, which are hot springs at the bottom of the ocean.

These vents form along mid-ocean ridges, where Earth's tectonic plates are splitting apart, and lava rises up through the gap, then hardens into long underwater mountain chains.

At these spots, seawater seeps into cracks in the ocean crust and collects underground, where it gets heated by magma and bursts out through the vents.

But it's not pure seawater that comes back out.

下载全新《每日英语听力》客户端,查看完整内容