A new body of highly diamondiferous kimberlites in the Nakyn field of the Yakutian kimberlite province

Толстов, А. В.; Minin, V. A.; Vasilenko, V. B.; Kuznetsova, L. K.; Razumov, A. N.

doi:10.1016/j.rgg.2008.09.001

Cited by 19 publications

(7 citation statements)

References 12 publications

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“…In other words, each subsequent portion of kimberlite fluid-melt was intruded in not yet completely consolidated kimberlites of previous phase. According to preliminary data, one can see a similar picture of the emplacement of different phases of kimberlites in a new high-diamondiferous kimberlite bodythe Maiskaya pipe [Tolstov et al, 2009].…”

Section: Compositional Structurementioning

confidence: 99%

Structural-Compositional Model of the Nyurbinskaya Kimberlite Pipe Formation (Sredne-Markha Area of the Yakutian Diamondiferous Province)

Гладков¹,

Koshkarev²,

Черемных³

et al. 2016

Geodin. tektonofiz.

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The paper presents the results of comprehensive study of the primary diamond deposit of the Nyurbinskaya pipe in the Yakutian diamondiferous province. It is established, that the pipe is confined to the fault junction of four directions and is composed of the kimberlite of four phases. Analysis of different faults and tectonic fracturing allowed to reconstruct the tectonic stress fields acting at the stage of the kimberlite body formation and to determine their occurrence sequence in time. The data obtained about regularities of the Nyurbinskaya pipe compositional structure and results of geologo-structural studies are combined in a single structural-compositional model of the deposit formation. Peculiarities of the fault network operation during the deposit formation stage are confirmed by experimental results using polarization-optical method. The model allowed to formulate the basic structural characteristics of the prospecting works object within which the formation of kimberlite body type of the Nyurbinskaya pipe is possible and to determine the elements of the fault network which are promising for the kimberlite pipes discovery. Recommended by D.P. GladkochubFor citation: Gladkov A.S., Koshkarev D.A., Cheremnykh A.V., João F., Karpenko M.A., Marchuk M.V., Potekhina I.A. 2016. Structural-compositional model of the Nyurbinskaya kimberlite pipe formation (Sredne-Markha area of the Yakutian Diamondiferous Province). Аннотация: В статье представлены результаты комплексного изучения коренного месторождения алмазов трубка Нюрбинская. Установлено, что трубка приурочена к узлу разломов четырех направлений и сложена T e c t o n o p h y s i c s 435 A.S. Gladkov et al.: Structural-compositional model of the Nyurbinskaya kimberlite pipe formation…кимберлитами четырех фаз. Анализ разноранговых разрывных нарушений и тектонической трещиноватости позволил восстановить поля тектонических напряжений, действовавшие на этапе формирования кимберлитового тела и определить последовательность их проявления во времени. Полученные данные о закономерностях вещественного строения трубки Нюрбинской и результаты геолого-структурных исследований объединены в рамках единой структурно-вещественной модели формирования месторождения. Особенности функционирования разрывной сети на этапе формирования месторождения подтверждены результатами экспериментов с использованием поляризационно-оптического метода. Полученная модель позволила сформулировать признаки, определяющие основные структурные характеристики объекта поисковых работ, в пределах которого возможно формирование кимберлитовых тел типа трубки Нюрбинской, и на их основании выделить те элементы разломной сети (разломные узлы), которые являются перспективными для обнаружения кимберлитовых трубок. Ключевые слова: кимберлиты; Якутская алмазоносная провинция; структурно-тектоническая модель;структурно-вещественная модель

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Section: Compositional Structurementioning

confidence: 99%

Structural-Compositional Model of the Nyurbinskaya Kimberlite Pipe Formation (Sredne-Markha Area of the Yakutian Diamondiferous Province)

Гладков¹,

Koshkarev²,

Черемных³

et al. 2016

Geodin. tektonofiz.

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“…В пределах гранит-зеленокаменных террейнов кимберлитовые поля встречаются относительно редко. Однако некоторые из них очень продуктивны, как, например, Накынское [Pokhilenko et al, 2000;Tolstov et al, 2009], что связано с присутствием специфических эклогитов, которые имеют протолит пелитового типа.…”

Section: тектоническое районирование сибирского кратона и соотношениеunclassified

“…В колонне мантии под тр. Майской [Tolstov et al, 2009] определения для суб-Ca-гранатов демонстрируют даже более резкую слоистость (приложение 2, б).…”

Section: накынское полеunclassified

“…Для Мархинского гранит-зеленокаменного террейна установлен специфический состав СКЛМ. В мантии под Накынским полем перидотитовый разрез содержит обильные прослои различных эклогитов и гранатсодержащих слюдистых пород (метапелиты в протолите) [Spetsius, 2004], а также перидоти-товых ксенолитов и минералов [Ashchepkov et al, 2014a;Tolstov et al, 2009]. Гранулито-гнейсовый характер террейна Марха имеет специфику разрезов и состава мантийных минералов.…”

Section: вариации структуры и состава мантийной литосферы разных террunclassified

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Mantle Terranes of the Siberian Craton: Their Interaction With Plume Melts Based on Thermobarometry and Geochemistry of Mantle Xenocrysts

Ashchepkov

Ivanov²,

Kostrovitsky

et al. 2019

Geodin. tektonofiz.

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We have studied variations in the structure and composition of minerals from the pipes of the Yakutian kimberlite province (YKP) in different mantle terranes of the Siberian craton. The study was based on an extensive database, including the microprobe analysis datasets consolidated by IGM, IG, IEC and IGDNM SB RAS and ALROSA and geochemical analysis of minerals performed by LA-ICP-MS (Laser Ablation Inductively Coupled Plasma Mass Spectrometry). The reconstruction shows layering under the tubes, including 6-7 slab that were probably formed due to subduction; the slabs are separated by pyroxenitic, eclogitic and metasomatic layers and dunite lenses. Transects and mantle profiles across kimberlite fields are constructed. Within the limits of the revealed tectonic terranes, we assume a collage of microplates formed in the early-middle Archean. Extended submeridional structures of the tectonic terranes are not always confirmed at the mantle level. Beneath the Anabar and Aldan shields, the mantle sections show more coarse layers and 3-4 large horizons of dunites with garnet and pyroxene nests separated by ilmenite-phlogopite metasomatites and pyroxenites. Terranes representing the suture zones between the protocratons (e.g. Khapchan) are often saturated with eclogites and pyroxenites that may occur as leghthy ascending bodies of magmatic eclogites penetrating through the mantle lithosphere structure (ML). A nearly ubiquitous pyroxenite layer at the level of 3.5-4.5 GPa formed probably in the early Archean with a high heat flux during melting of eclogites and was subsequently traced by plume melts. Within the early Archean protocratons-granite-greenstone terranes (Tungus, Markha, Berekta, and Sharyzhalgai, ~3.8-3.0 Gyr [Gladkochub et al., 2019], the mantle lithosphere is less depleted and largely metasomatized. The ML structure of the Daldyn and Magan granulite-orthogneiss terranes is layered with folding revealed in the north-to-south sections from the Udachnaya pipe to the Krasnopresnenskaya pipe, which is less pronounced in the latitudinal direction. From the Daldyn field to the Alakit field, there is an increase in the degree of metasomatism, and higher alkalinity of pyroxenes and larger amounts of phlogopite are noted. The most productive Aikhal and Yubileinaya pipes are confined to a dunite core, which is accompanied by a change in the specialization of high-charge elements Ta-Nb to Zr-Hf. Within the limits of the Magan terrane, the thin-layer structure of the middle GEODYNAMICS & TECTONOPHYSICS

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“…Район работ расположен в Якутской алмазонос ной провинции в междуречье рек Вилюй и Марха, в пределах Вилюйско-Мархинской зоны (ВМЗ) глубинных разломов, которую ввиду специфики следует рассматривать в ранге минерагенической [5]. К настоящему времени в её пределах выявлены и разведаны месторождения алмазов разной про дуктивности (Мирнинское и Накынское кимберлитовые поля на расстоянии 315 км одно от друго го) [1,4,9,14,15].…”

unclassified

Conditions of localization and criteria for kimberlites exploration (on the example of Igyatta diamondiferous region, Western Yakutia)

Maltsev

Толстов

Berezhnev

2019

Izvestiya Vysshikh Uchebnykh Zavedeniy. Geologiya i Razvedka

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The main source of mined diamonds in Russia is the Yakutia diamond-bearing province (YAP). To date, all open areas within the prospective Vilyuy-Markha deep fault zone (VMZ) of the YAP, which is a mineragenetic and which hosted diamond deposits of Mir, International, Nyurbinskaya, Botuobinskaya, have been studied satisfactorily. It is unlikely to reveal new kimberlite fields within its' opened part. In this case, the presence of direct signs of new objects beneath the Mesozoic-Cenozoic strata indicates that the diamond potential of the territory is not exhausted. This was confirmed by the discovery in 2015 of a kimberlite body in the Suldyukar field, which confirmed the presence of the Igyatta diamondiferous region and allows us to view the overlapped areas of the VMZ as the most promising for discovering of the new deposits. However, the search for buried deposits requires improvement of the criteria.

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A new body of highly diamondiferous kimberlites in the Nakyn field of the Yakutian kimberlite province

Cited by 19 publications

References 12 publications

Structural-Compositional Model of the Nyurbinskaya Kimberlite Pipe Formation (Sredne-Markha Area of the Yakutian Diamondiferous Province)

Structural-Compositional Model of the Nyurbinskaya Kimberlite Pipe Formation (Sredne-Markha Area of the Yakutian Diamondiferous Province)

Mantle Terranes of the Siberian Craton: Their Interaction With Plume Melts Based on Thermobarometry and Geochemistry of Mantle Xenocrysts

Conditions of localization and criteria for kimberlites exploration (on the example of Igyatta diamondiferous region, Western Yakutia)

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