Abstract Suprasubduction zone (SSZ) ophiolites of the northern Appalachians (eastern North America) have provided key constraints on fundamental tectonic processes responsible for evolution Appalachian orogen. The central and southern Appalachians, which extend from New York to Alabama (USA), also contain numerous ultramafic-mafic bodies that been interpreted as ophiolite fragments; however, th...

Agromining aims to improve the fertility of naturally metal-rich soils by extracting metals, such as nickel (Ni), using hyperaccumulator plants. Ultramafic are characterized low levels, limiting yields. Here, we characterize potential benefits for phytoextraction efficiency co-cropping a Ni-hyperaccumulator (Odontarrhena chalcidica) and legume (Vicia sativa), following two-year field experiment...

The Von Damm Vent Field (VDVF) is located on the flanks of the Mid-Cayman Spreading Centre, 13 km west of the axial rift, within a gabbro and peridotite basement. Unlike any other active vent field, hydrothermal precipitates at the VDVF comprise 85-90% by volume of the magnesium silicate mineral, talc. Hydrothermal fluids vent from a 3-m high, 1-m diameter chimney and other orifices at up to 21...

Introduction: Paterae on Io are similar to calderas on the Earth and other planets, yet they have some differences, such as their great sizes (from 2 to 206 km diameter) and lack of high edifices. Tidal heating from Jupiter leads to the production of molten material and the eruption of large amounts of mafic to ultramafic lava within Io’s paterae, as well as across its surface. Formation of pat...

Most of Earth's diamonds are connected with deep-seated mantle rocks; however, in recent years, μm-sized diamonds have been found in shallower metamorphic rocks, and the process of shallow-seated diamond formation has become a hotly debated topic. Nanodiamonds occur mainly in chondrite meteorites associated with organic matter and water. They can be synthesized in the stability field of graphit...

The production of hydrogen and methane by geochemical reactions associated with the serpentinization of ultramafic rocks can potentially support subsurface microbial ecosystems independent of the photosynthetic biosphere. Methanogenic and methanotrophic microorganisms are abundant in marine hydrothermal systems heavily influenced by serpentinization, but evidence for methane-cycling archaea and...

The objects of study are the Agardag and Ulor ultramafic massifs, which part South Tuva ophiolite belt. aim this work is to petrographic, petrochemical geochemical features harzburgites dunites studied massifs. As a result petrographic study, main types rocks that make up massifs were identified. Harzburgites predominate in massif, while more common massif. In often plastically deformed by synt...