Cu–Mn–Fe alloys and Mn-rich amphiboles in ancient copper slags from the Jabal Samran area, Saudi Arabia: With synopsis on chemistry of Fe–Mn(III) oxyhydroxides in alteration zones

Surour, Adel A.

doi:10.1016/j.jafrearsci.2014.09.005

Cited by 3 publications

(4 citation statements)

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“…Most often, pseudomorphs of hydrogoethite occur in near-surface conditions. Replacement with goethite is less common [44,45]. We found that goethite after pyrite pseudomorphic alterations occurred in the Ordovician shales.…”

Section: Discussionmentioning

confidence: 63%

Naryn-Gol Creek Sapphire Placer Deposit, Buryatia, Russia

et al. 2022

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A new gem corundum occurrence has been discovered in the Naryn-Gol Creek placer of the Dzhida volcanic field (Russia). In this placer deposit, sapphire associates with large crystals of garnet, spinel, augite, olivine, enstatite, ilmenite, Ti-magnetite, and alkali feldspar. Such a combination of minerals is typical for the placer deposits associated with alkali basalts widely distributed in Southeastern Asia and Australia. We have also found sapphire crystals in phonotephrites of the nearby Cenozoic alkali-basalt paleovolcano Barun Khobol Pravyi, and in basalt sample and trachybasalt from the valley flood basalts. The chemical composition of sapphire is generally typical for ‘basalt’ corundum: it is rich in Fe, and depleted in Ti and Cr. The δ18O SMOW values of corundum and related megacrysts range from 4.6 to 6.8 ‰, thus corresponding to the isotopic signature of igneous rocks. Etched and corroded surfaces of sapphire and other megacrysts indicate that they are in non-equilibrium with their host alkali basalts. Volatile components, CO2 in particular, played a significant role during sapphire formation as gas inclusions reveal.

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Section: Discussionmentioning

confidence: 63%

Naryn-Gol Creek Sapphire Placer Deposit, Buryatia, Russia

et al. 2022

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“…Manganese is a known impurity in some amphiboles, including actinolite and amosite (Surour, 2015). Amosite fibres can be visualised in Figure 4.17 E based on the 55 Mn counts.…”

Section: Amositementioning

confidence: 99%

“…Subsequently, more analysis was carried out on two ROIs with significant particulate presence. Aluminium and calcium were also added to the analysis panel as known impurities (Mutch et al, 2016;Surour, 2015). Potassium was selected as a key factor in ionic imbalance (Eil et al, 2016) (Figure 6.18).…”

Section: Analysis Of Chest Wall Tissue-patientmentioning

confidence: 99%

“…Magnesium is also a main nominal element of actinolite, amosite, chrysotile, widely known to substitute into crocidolite (Kusiorowski et al, 2015). Aluminium, titanium, and manganese were also selected because they have been known to substitute into some amphiboles (Mutch et al, 2016;Surour, 2015). Aluminium has been reported to partially substitute for silicon in the tetrahedral (T) site of amphiboles (Papike & Cameron, 1976).…”

Section: Introduction To the Chaptermentioning

confidence: 99%

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A multimodal approach to identify asbestos and characterise clinically relevant mesothelioma biomarkers

Voloacă¹

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Malignant mesothelioma (MM) is an aggressive cancer of the mesothelium, with long latency and poor overall survival (OS), associated with occupational and environmental exposure to asbestos and other mineral fibres (MF). Considering that early diagnosis has been linked to an improvement in prognosis and treatment response, there is an urgent need for reliable MM biomarkers. Additionally, current asbestos identification techniques lack sensitivity and fail to detect shorter fibres or fibre fragments. Accurately identifying MF within MM samples is not only essential in aiding early diagnosis, but it also plays a key role in linking this diagnosis to asbestos exposure, which has high implications in legal, social, and political matters. The aim of the current project is to (1) develop MM cellular models suitable for laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) imaging, (2) identify various MF based on their metal content within MM in vitro models as well as patient samples using a combination of LA-ICP-MS and LA-ICP-time of flight (TOF)MS instrumentation, (3) investigate the MM metallome in human tissue samples using LA-ICP-MS elemental mapping, and (4) characterise a panel of emerging MM biomarkers using a multi-modal approach. For the first time, this study has developed an asbestos detection technique using LA-ICP-MS imaging to identify MF within MM samples. High-resolution and high-speed analysis suggests that LA-ICP-MS imaging has the potential to be ultimately integrated in the clinical workflow to aid the identification of patients at an earlier and more treatable stage to improve survival outcomes. Moreover, the selected panel of biomarkers was characterised in cellular models, whilst novel biomarkers were tentatively identified using matrix assisted laser desorption ionisation (MALDI)-MS imaging of tissue microarrays, setting the basis for vital future investigations, and ultimately supporting MM biomarker discovery, early diagnosis, and improved prognosis.

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