Extraterrestrial iron in the Cretaceous-Danian sediments

Pechersky, D. M.; Нургалиев, Д. К.; Fomin, V. A.; Sharonova, Z. V.; Gil’manova, D. M.

doi:10.1134/s1069351311040082

Cited by 16 publications

(7 citation statements)

References 5 publications

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“…Against the scatter of the data, it is clearly seen that the zero group tends to increase with an increase in the sedimentation rate (Figure 17). In particular, the [5,9] (c) a metal part of the meteorites [5,9]. N-the number of definitions.…”

Section: Discussion On Extraterrestrial Nature Of Metallic Iron Partimentioning

confidence: 99%

“…In recent years, we have studied the spreading and composition of metallic iron particles in the Pleistocene lacustrine sediments of the Darhad Basin, northern Mongolia, in the Upper Miocene sediments of Lake Baikal, in epicontinental sediments of Miocene, Oligocene, Eocene, Cretaceous, Late Jurassic, and Early Cambrian age in different regions of North Eurasia and in ocean sediments of the NorthWestern Atlantic [4][5][6][7][8][9][10]. This article represents a result of a review and generalization of thermomagnetic and microprobe analyzes data for mentioned above articles and regions.…”

Section: Introductionmentioning

confidence: 99%

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Extraterrestrial Metallic Iron in the Lacustrine, Epicontinental and Oceanic Sediments: A Review of Thermomagnetic and Microprobe Analyzes Data

Dm¹,

Dm²

2016

J Geol Geophys

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Section: Discussion On Extraterrestrial Nature Of Metallic Iron Partimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Extraterrestrial Metallic Iron in the Lacustrine, Epicontinental and Oceanic Sediments: A Review of Thermomagnetic and Microprobe Analyzes Data

Dm¹,

Dm²

2016

J Geol Geophys

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“…However, the present paper addresses another question. In our investigations, we encountered such material as particles of metallic iron and nickel, and then, the idea emerged to apply the thermomagnetic analysis (TMA) for an extensive study of the distributions of iron particles (Pechersky, 2008;Pechersky, Nurgaliev, and Trubikhin, 2008;Pecherskii et al, 2011). Actually, cosmic dust has long since been studied.…”

Section: Introductionmentioning

confidence: 98%

“…In our study, we assumed a linear dependence of the Curie point of the iron nickel alloy, where the nickel con tent is described by the simple formula: Ni(%) = 0.243(770 -T c ), where 770 is the Curie point of pure iron and T c is the Curie point of the iron nickel alloy in the specimen (Bozorth, 1951;Pecherskii et al, 2011). However, in the alloys containing more than 20% Ni, the Curie points substantially deviate from the linear dependence (Bozorth, 1951;Nagata, Funaki, and Danon, 1986;Nagata, Danon, and Funaki, 1987).…”

Section: Introductionmentioning

confidence: 99%

Thermomagnetic evidence of native iron in sediments

Pechersky

Sharonova

2012

Izv., Phys. Solid Earth

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The paper summarizes the results of thermomagnetic analysis concerning the distribution of metallic iron in the sediments ranging in age from Miocene to Early Cretaceous sampled from the following sections: Gams (Austria); Verkhorech'e and Sel'bukhra (the Crimea); Kvirinaki and Tetritskaro (Georgia); Aimaki, Dzhengutai, Madzhalis, and Gergebil (Ciscaucasia, Russia); Klyuchi and Teplovka (Volga region, Russia); Koshak (Kazakhstan); and Khalats and Kara Kala (Turkmenia). Small amounts of native iron (from 10 -5 % to 0.05%) are identified in 521 samples of 921 studied; i.e., iron particles are almost pervasive. This fact traces the origin of these particles to cosmic dust. Some established features point to the heterogeneous char acter of the cosmic dust: (a) the samples clearly fall into two groups. One group comprises the rocks that con tain iron particles; the rocks of the other group are iron free. In the first group, four intervals are distinguished where the sediments are globally enriched with iron with constant nickel content (5-6%); (b) in terms of composition, the iron particles are divided into three groups. The first group contains pure iron; the particles pertaining to the second group contain iron with a minor amount of nickel typical for kamacite; and the third group comprises the particles of Fe Ni alloy with more than 20% nickel. The first and the second groups are ubiquitous; the particles of the third group are spread locally. They bear no relation to cosmic dust and are probably associated with the meteoritic impacts.

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“…Modern data on distribution of native iron and nickel in the cosmic dust is rather limited, since only "direct" methods of detecting such particles were used. Thermomagnetic analysis (TMA) up to 800ºC was employed during petromagnetic (rock-magnetic) studies of sediments [1][2][3][4][5][6][7]. The increase of ТMA temperature interval by 100 о has given the chance to observe a detailed picture of a distribution of metallic iron in space and time.…”

Section: Introductionmentioning

confidence: 99%

Metallic Iron and Nickel in Cretaceous and Cenozoic Sediments: The Results of Thermomagnetic Analysis

Pechersky¹

2010

JEP

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With the aid of thermomagnetic analysis (TMA) up to 800ºС the composition and distribution of particles of native iron and Fe-Ni alloy was studied in 15 sections, Gams (Austria), Verhorechie and Selbuhra (Crimea), Kvirinaki and Tetritskaro (Georgia), Aimaki, Bass, Dzhengutaj, Madzhalis and Gergebil (North Caucasus, Russia), Klyuchi and Tep-lovka (Volga Region, Russia), Koshak (Kazakhstan), Kara-Kala and Khalats (Turkmenistan). The age of sediments varies from Miocene to Early Cretaceous. Iron particles are present at 521samples out of 921studied. Their percentage varies from 10-5% to 0.05%. The distribution consists of two groups: 1) “zero” group (iron is not found by TMA); 2) group of logarithmic normal distribution with a differing modes. The global enrichment by iron particles in synchronous deposits of Miocene, Maastrichtian-Danian, Santonian and Cenomanian was discovered. With respect to nickel content, the iron particles fall into two groups: 1) nearly pure iron without nickel; and 2) iron with nickel content up to 20%, with modal value of 5%. The source of iron particles is the cosmic dust. Particles of pure nickel and the alloy containing more of 20% of nickel are very rare. Possibly, such particles are related mainly with impact events. A peak of elevated iron content with nearly constant nickel of 5-6% was found in almost all studied sections. It is a global effect which is not dependent of place and time of deposition of iron particles

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Extraterrestrial iron in the Cretaceous-Danian sediments

Cited by 16 publications

References 5 publications

Extraterrestrial Metallic Iron in the Lacustrine, Epicontinental and Oceanic Sediments: A Review of Thermomagnetic and Microprobe Analyzes Data

Extraterrestrial Metallic Iron in the Lacustrine, Epicontinental and Oceanic Sediments: A Review of Thermomagnetic and Microprobe Analyzes Data

Thermomagnetic evidence of native iron in sediments

Metallic Iron and Nickel in Cretaceous and Cenozoic Sediments: The Results of Thermomagnetic Analysis

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