Introduction: Metadolerite dykes in the Western Dharwar Craton represent oldest generation of mafic dyke swarms craton. The emplacement these after a period crust building activity and komatiite volcanism, helps to understand evolution Subcontinental Lithospheric Mantle (SCLM) Archean dynamics. Methods: We report whole rock major, trace element geochemistry Sr-Nd isotope characteristics for thi...

This study investigates the age and composition of a suite mafic dykes in southeastern Gawler Craton. Mafic intrude gneissic fabric ca 1850 Ma Donington Suite were previously interpreted to have been emplaced at 1845 Ma. However, sensitive high-resolution ion microprobe U–Pb dating zircon within one these shows it was 1564 ± 4 The sampled dyke also contains population inherited cores with an 17...

The Wadhrai granite stock is a part of the Nagar Parkar Igneous Complex, an extension Neoproterozoic Malani Suite western Rajasthan. It occupied by petrographically uniform comprising perthite, plagioclase, quartz, with small quantities biotite, opaque oxides, titanite, and secondary minerals. rocks are sparingly porphyritic contain dykes microgranite, aplite, rare pegmatite. In south-central p...

Observations of the relationship between linear or planar features on either side of dykes usually form the basis of a field determination of their mode of emplacement, although it is known that sections oblique to planar features may lead to conflicting results. In Eastern Tasmania only rarely are examples encountered where dyke wall-rock units are of use. However, dyke wall irregularities are...

[1] Lava dome eruptions are commonly characterized by large fluctuations in discharge rate with cyclic behaviour on time-scales ranging from hours to decades. Examples include Bezymianny volcano (Russia), Merapi (Java), Santiaguito (Guatemala), Mt St Helens (USA), Mt Unzen (Japan), and Soufrière Hills volcano (Montserrat). Previous models have assumed simple cylindrical conduits for magma trans...

The case study presented here deals with the Pb-Zn-Cu skarn ores hosted in Rosas Shear Zone (RSZ), a highly strained domain located external zone of Sardinian Variscan chain. RSZ is characterized by several tectonic slices Cambrian limestones within strongly folded and foliated Cambrian-Ordovician siliciclastic succession, intruded late granites mafic dykes. Based on geological mapping, structu...

New geochemical data were presented for the mafic (basalts and gabbros) ultramafic (dunites, serpentinites pyroxenites) rocks from Mawat ophiolite exposed in Zagros suture zone northeastern Iraq. The mantle section of is composed serpentinized peridotites, harzburgites, dunites, chromitites pyroxenite dykes. crustal layered amphibole-rich gabbros, pegmatitic gabbros as well basalts minor felsic...