We present results of experiments on mixtures of olivine tholeiite and mantle harzburgite, at 5 kb and 1050-1150°C, under conditions of controlled hydrogen fugacity. The basalt end-member was Kilauea 1921 olivine tholeiite + 3 wt.% H2O, and the harzburgite end-member was a mixture of olivine and orthopyroxene mineral separates made from a mantle-derived lherzolite xenolith. The experiments on m...

Small-scale assimilation of limestone during the intrusion of an olivine basalt feeder dyke into an Eocene argillaceous, siliceous biomicrite in the Tokatoka area has resulted in the incorporation of large amounts of calcium into the parent magma. Initial effects of assimilation have caused partial resorption of the earlyformed igneous mineralogy and the precipitation of calcic, iron-rich clino...

The lunar regolith records both the geological history and processes of the Moon and also that of particles from the Sun and galaxy. Such a record extends back to the age of the rock unit upon which the regolith is developed, but complex impact gardening and processing makes this record difficult to recover and interpret. Ancient rock units, such as lava flows, begin to have regolith developed ...

Technology intervention is a key success to restore properties and productivities of a highly weathered soil (Oxisols). The main challenge is to find materials with the ability to generate soil negative charge, release various nutrients and suppress toxic elements. The objective of this study was to increase negative charge and nutrient content, and suppress Al and Mn toxicities of an Oxisol us...

The Jizerka Quaternary alluvial placer in the Czech Republic has been a well-known source of gemstones since 16th century, and only one Europe that yielded significant amount jewel-quality sapphire. Besides Mg-rich ilmenite (“iserine”), which is most common heavy mineral at locality, some other minerals have mined for jewellery purposes. These are corundum (sapphire ruby varieties), zircon (“hy...

This work presents a technical and economic study using sugar cane bagasse ash (SCBA) to partially replace Portland cement clinker. To evaluate the viability, replacement rates of 10, 20, 30% were used in experiments. The ashes following conditions: (i) as collected (AC), (ii) ground (G), (iii) re-burnt (RG). Three composition parameters mortar mix procedures: with water factor/fixed binder vol...

Abstract We report a new zircon U–Pb age of 1257 ± 6 Ma for the Punugodu granite (PG) pluton in Eastern Dharwar Craton (EDC), Southern India. The Mesoproterozoic PG is alkali feldspar hypersolvus emplaced at shallow crustal level, as evident from presence rhyodacite xenoliths and hornfelsic texture developed metavolcanic country rocks Neoarchaean Nellore Schist Belt (NSB). Geochemically, metalu...