Owing to the importance of serpentinites for planetary geochemical and geodynamic processes, there has been much work discerning origins their parent rocks, including distinguishing between derived from a subducting plate versus overlying mantle in exhumed subduction complexes. The island New Caledonia (SW Pacific Ocean) provides rare window into Cenozoic processes. is unique exposing both an e...

This virtual special issue represents a collection of papers concerning Crustal Melting selected by the Editor from those published on various aspects of this theme in the JMG since 1982. The papers are grouped into sequences that address topics that have been prominent in the JMG during the last 30 years concerning the origin, evolution and tectonic role of migmatites and migmatitic granulites...

Due to the limited distribution of karst rocks and, accordingly, small number caves in Ukrainian Carpathians, non-karst (pseudokarst, clastokarst) genesis attract considerable attention from cave researchers. The latter most often develop massive and coarse-grained sandstone strata, usually found as part flysch strata. non-karstic are widely spread Cretaceous Paleogene formations Carpathians. M...

Introduction: Planar deformation features (PDFs) in quartz are diagnostic impact evidence. Using light microscopy, it is often impossible to distinguish between PDFs and tectonic deformation lamellae. [1] showed that PDFs can be imaged using a cathodoluminescence (CL) detector in a scanning electron microscope (SEM) and that in SEM-CL images PDFs can be distinguished from tectonic microfracture...

A prominent long-period wave with a duration of 2000 sec or longer was recorded with a very-broadband system in Pasadena on June 18, 1988. This wave was not observed elsewhere, and i s considered of local origin. The acceleration amplitude is 2.5x10 -5 cm/sec 2 in the northwest direction, with the vertical component less than 10% of the horizontal. The horizontal acceleration can be interpreted...

Earth's history has been witness to recurrently alternating phases of catastrophic evolution and dominant tectonic deformations, contractions and extension of rifting and spreading leading to quasi-cyclic changes in sedimentary environment and various earth processes. Recent studies have shown quasi-periodicities of 32 2 Million years (Myr) in various endogenic (geomagnetic reversals, magmatic ...

In Earth Sciences there is a growing interest in studies concerning soil-radon activity, due to its potential as a tracer of numerous natural phenomena. Our work marks an advance in the comprehension of the interplay between tectonic activity, volcanic eruptions and gas release through faults. Soil-radon measurements, acquired on Mt. Etna volcano in 2009-2011, were analyzed. Our radon probe is ...