In pegmatites containing abundant petalite and spodumene, such as those from the Barroso–Alvão (BA) aplite-pegmatite field, calibrating a portable laser-induced breakdown spectroscopy (pLIBS) equipment to identify analyze these minerals may be challenging. Forty-nine samples of spodumene + quartz were collected 22 aplite-pegmatites BA field sent for inductively coupled plasma-mass analysis. One...

We present a full characterization of 20 cm-thick tephra layer found intercalated in the marine sediments recovered at Site U1524 during International Ocean Discovery Program (IODP) Expedition 374, Ross Sea, Antarctica. Tephra bedforms, mineral paragenesis, and major- trace-element composition on individual glass shards were investigated age was constrained by 40Ar-39Ar sanidine crystals. The d...

Abstract The McArthur River (HYC) Zn-Pb-Ag deposit in the Carpentaria Zn belt, northern Australia, is one of world’s largest and most studied sediment-hosted base metal deposits, owing to its lack deformation preservation sedimentary ore textures. However, formation process (syngenetic vs. epigenetic) still a subject controversy. In this paper we focus on key characteristics HYC that remain une...

The paper presents the results of an analysis faults different ranks near Okhotnichya Cave in Pribaikalye, aimed at identifying their role formation and evolution cave its adjacent areas. This was done using rank-wise structural-paragenetic faults, which forms basis a specialized mapping tool for fault zones. Factual evidence obtained through several methods. speleoinitiating fracture network s...

This study presents rock slab and thin section reflection mapping, element mapping by Micro-XRF (μ-XRF) analysis, in situ cassiterite U-Pb laser ablation-inductively coupled plasma mass spectrometer (LA-ICP-MS) ages of the Xinlu Sn-Zn deposit, Nanling Sn-W belt, South China. The new results provided constraints on age processes Sn mineralization thus further discussed role Paleo-Pacific plate f...

The objective of the study was to characterize clays Lama depression in Benin. Macroscopic examination hand soundings, dynamic penetration test and stratigraphic correlation water borehole logs, as well scanning electron microscopy (SEM) combined with energy-dispersive X-ray microanalysis (EDX) method were made on compact or stratified clays. large grains are embedded a sintered matrix. texture...

One characteristic of many subduction zone garnet peridotites is that they contain titanium-bearing phases not otherwise Ž . found in mantle rocks. In particular, titanoclinohumite TiCH andror its breakdown assemblage consisting of symplectic intergrowths of olivine and ilmenite is common in many of these bodies. The Alpe Arami garnet lherzolite of the Lepontine Alps, while lacking TiCH, displa...