M. A. Ivanova

Zeolite formation via aqueous alteration of calcium‐aluminum‐rich inclusions on the CR and CV parent asteroids

M. A. Ivanova, Sergey N. Britvin, Alexander N. Krot, Kazuhide Nagashima et autres

Abstract We describe here zeolites and zeolite‐like phases in Ca,Al‐inclusions (CAIs) from Kaidun microbreccia and Northwest Africa (NWA) 3118 (CV3) chondrite studied using scanning electron microscopy (SEM), electron probe microanalysis (EPMA), secondary ion mass spectrometry (SIMS), Fourier transform infrared (FT‐IR) spectroscopy, and …

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Rapidly evolving composition of nebular infall recorded by magnesium isotopes in refractory inclusions

Haoyu Li, Ren T.C. Marquez, G. Budde, Haolan Tang et autres

The 26 Al- 26 Mg systematics in calcium–aluminum-rich inclusions (CAIs)—the oldest known Solar System solids—has traditionally been used to provide high-resolution temporal constraints on the early Solar System evolution. More recently, the study of variations in the initial Mg isotope composition has …

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ULTRAREFRACTORY INCLUSION FROM THE H3 ORDINARY CHONDRITE CHUG CHUG 072

Konstantin M. Ryazantsev, M. A. Ivanova, Alexander Krot, Kazu Nagashima et autres

Implementation and Rollout of a Trusted AI-Based Approach to Identify Financial Risks in Transportation Infrastructure Construction Projects

Michael Grims, Daniel Karas, M. A. Ivanova, Gerhard Höfinger et autres

Using big data for risk analysis of construction projects is a largely unexplored area. In this traditional industry, risk identification is often based either on so-called domain expert knowledge, in other words on experience, or on different statistical and quantitative analysis of …

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Metamorphism and aqueous alteration of the unusual CY carbonaceous chondrite Northwest Africa 4757

M. A. Ivanova, Maria Georgievna Krzhizhanovskaya, Sergey N. Britvin

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Ultrarefractory inclusions in the Sayh al Uhaymir 290 CH carbonaceous chondrite

Konstantin M. Ryazantsev, M. A. Ivanova, Alexander N. Krot, Chi Ma et autres

Abstract Ultrarefractory Ca,Al‐rich inclusions (UR CAIs) in the Sayh al Uhaymir (SaU) 290 CH3 carbonaceous chondrite consist of ultrarefractory Zr,Sc‐rich minerals (allendeite, kangite, tazheranite, warkite, and Y‐perovskite), grossite, grossmanite, hibonite, melilite, and spinel. Several of them have a core–mantle structure with ultrarefractory …

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Origin of metal nodules, veins, and fine‐grained metal in several L and H chondrites

Svetlana N. Teplyakova, Cyril A. Lorenz, M. A. Ivanova

Abstract We investigated the metal nodules, veins, fine‐grained particles of ordinary chondrites (OC) Ash Creek (L6), Ghubara (L5), NWA 6096 (L6), Tsarev (L5), Kunya‐Urgench (H5), NWA 1588 (H3.8), Tamdakht (H5) and Timochin (H5) using optical microscopy, SEM, and LA‐ICP‐MS to determine trace …

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The first meteoritic ammonium mineral: Discovery of boussingaultite in the Orgueil CI1 carbonaceous chondrite

Sergey N. Britvin, Oleg S. Vereshchagin, Natalia S. Vlasenko, Maria Georgievna Krzhizhanovskaya et autres

Abstract The enigma of ammonium mineral speciation in the solar system has no proven solution due to the lack of data on the real minerals serving as space ammonium carriers. We herein report on the discovery of the first ammonium mineral in …

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Origin of the metal in chondritic and achondritic lithologies of the Sierra Gorda 013 СBa‐like chondrite

M. A. Ivanova, Svetlana N. Teplyakova, Cyril A. Lorenz, Shuying Yang et autres

Abstract Sierra Gorda 013 (SG 013) is an unusual CBa‐like chondrite containing two texturally different, isotopically identical lithologies—chondritic (L1) and achondritic (L2), which should have a common origin. The metal globules of the L1 metal preserved the magmatic pattern of the siderophile …

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The Role of Administrative Law in Ensuring Human Welfare

M. A. Ivanova

The presented work is aimed at exploring the role and importance of administrative law in the context of ensuring human well-being. The study analyzes the revision of approaches to defining the system and content of public relations in the field of administrative …

High-precision SIMS analyses of initial 26Al/27Al in un-melted refractory inclusions: The search for multiple condensation episodes

G. J. MacPherson, Alexander N. Krot, Kazuhide Nagashima, M. A. Ivanova

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Metamorphism and Aqueous Alteration of the Unusual Carbonaceous Chondrite Northwest Africa 4757

M. A. Ivanova, Maria Georgievna Krzhizhanovskaya, Sergey N. Britvin

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