Subduction divided the palaeo-Pacific Ocean
Nature Geoscience
2012년2월27일

A series of ancient subduction zones could have existed in the palaeo-Pacific Ocean about 200 million years ago, reports a study published online this week in Nature Geoscience. Douwe van der Meer and colleagues compiled geological data stored in rocks found along the margins of the North American and Asian continents. The data show that the rocks originally formed above ancient subduction zones located somewhere in the middle of the Pacific Ocean, around 200 million years ago. Furthermore, seismic images of the mantle beneath the Pacific Ocean identify potential remnant slabs of Earth’s rigid outer shell that could have been forced into the mantle at the subduction zones, and have since lingered there for hundreds of millions of years. Together, the two independent data sets mark out the location of a north?south trending series of subduction zones that would have divided the palaeo-Pacific Ocean into two sub-basins.
doi: 10.1038/ngeo1401
리서치 하이라이트
-
3월4일
Environment: Reservoirs account for more than half of water storage variabilityNature
-
3월2일
Evolution: Neanderthals may have heard just like usNature Ecology & Evolution
-
3월2일
Geoscience: Earth’s atmosphere may return to low-levels of oxygen in one billion yearsNature Geoscience
-
2월26일
Environment: Shifting from small to medium plastic bottles could reduce PET wasteScientific Reports
-
2월24일
Environment: European forests more vulnerable to multiple threats as climate warmsNature Communications
-
2월11일
Environment: Global CFC-11 emissions in declineNature