bonin

The δ56Fe isotope variation among different boninite sampling suites. Credit: IOCAS Subduction-zone magmas are characterized by high fluid contents and Fe3+/ΣFe ratios, which are closely associated with slab-derived fluids during subduction. However, instead of a heavier iron isotope composition preferred under an oxidized state, arc magmas have lighter iron isotope compositions than seafloor basalts, including mid-ocean ridge…

A historic drought affecting Italy's largest river has brought a World War II-era shipwreck to light.The Po River runs 405 miles (651.8 km) from the Cottian Alps to empty into the Adriatic Sea. It's currently facing its worst drought in 70 years, which has caused a decades-old sunken ship to resurface.  The Zibello, a 160-foot (48.8-meter) barge that transported wood in World War II and sank in 1943, is usually hidden beneath the Po's waters, the Associated Press reports. Now, the river's water levels are so low that the…