Neutron Tomography Studies of Two Lamprophyre Dike Samples: 3D Data Analysis for the Characterization of Rock Fabric

Abstract

The rock fabric of two lamprophyre dike samples from the Koy-Tash granitoid intrusion (Koy-Tash, Jizzakh region, Uzbekistan) has been studied, using the neutron tomography method. We have performed virtual segmentation of the reconstructed 3D model of the tabular igneous intrusion and the corresponding determination of dike margins orientation. Spatial distributions of inclusions in the dike volume, as well as further analysis of size distributions and shape orientations of inclusions, have been obtained. The observed shape preferred orientations of inclusions as evidence of the magma flow-related fabric. The obtained structural data have been discussed in the frame of the models of rigid particle motion and the straining of vesicles in a moving viscous fluid.

Non‐destructive quantitative analysis of melt inclusions in extraterrestrial samples: Case study of chassignite via nanoscale X‐ray computed tomography

“…A fully non‐destructive parental magma composition estimation of rare cumulate samples can be achieved with a combination of non‐destructive 3‐D phase assemblage estimations within melt inclusions (as shown in this study) and non‐destructive 3‐D chemical analysis of the phases. Examples of ongoing non‐destructive 3‐D chemical studies include confocal 3‐D X‐ray fluorescence (XRF) analysis (Lühl et al., 2013; Malzer & Kanngieβer, 2005; Nakano & Tsuji, 2010) and neutron 3‐D tomography analysis (Gait et al., 2022; Losko & Vogel, 2022; Zel et al., 2022).…”

"New Views on the Nature of the Malguzar Dike Belt (Southern Tien-Shan)"

“…Acid differentiates of the dike belt in the Malguzar mountains are much less common than the main ones. They form stock-like and dikeshaped bodies of diorites, quartz diorites, granodiorite porphyries, granite porphyries, and quartz porphyries and lamprophyres, the latter are widespread in the betrayals of the Koytash and Karatau mountains [8,9]. Small stocks and dykes of diorites, microdiorites, quartz diorites, diorite-porphyrites are found in Myksai, Saibeksai, and Bash-Pshagar.…”