The role of fracture dynamics in kimberlite pipe formation

1979 ◽  
pp. 344-353 ◽  
Author(s):  
Orson L. Anderson
Keyword(s):  
Kimberlite Pipe ◽  
Fracture Dynamics ◽  
Pipe Formation

The role of plicative structures as forecast criteria in the Alakit-Мarkhinsky field (western Yakutia)

2021 ◽  
pp. 6-13
Author(s):  
Dmitry Ivanov ◽  
Alexander Tolstov ◽  
Vyacheslav Ivanov
Keyword(s):  
Opposite Sign ◽  
Kimberlite Pipe ◽  
Pipe Formation ◽  
Regional Factors ◽  
Tectonic Features ◽  
Low Amplitude ◽  
Kimberlite Field

This paper describes the tectonic features of the Alakit-Markha kimberlite field, regional factors of kimberlite magmatism control in this area, structural and tectonic preconditions for kimberlite pipe prospecting. The paper highlights kimberlite pipe formation features and the role of tectonics in this process. The most promising areas are those related to low-amplitude negative structures (e.g. depressions), especially transverse low-amplitude complications of the opposite sign for the main plicative structure: for antiforms (elevations), these are saddle-shaped depressions, and antiform elevations are for synforms (depressions).

‘Premier’ evidence for prolonged kimberlite pipe formation and its influence on diamond transport from deep Earth

Geology ◽  
2018 ◽  
Vol 46 (10) ◽  
pp. 843-846 ◽  
Author(s):  
Sebastian Tappe ◽  
Ashish Dongre ◽  
Chuan-Zhou Liu ◽  
Fu-Yuan Wu
Keyword(s):  
Kimberlite Pipe ◽  
Deep Earth ◽  
Pipe Formation

A unique diamondiferous peridotite xenolith from the Udachnaya kimberlite pipe, Yakutia: role of subduction in diamond formation

2015 ◽  
Vol 56 (1-2) ◽  
pp. 306-320 ◽  
Author(s):  
A.M. Logvinova ◽  
L.A. Taylor ◽  
E.N. Fedorova ◽  
A.P. Yelisseyev ◽  
R. Wirth ◽  
...  
Keyword(s):  
Kimberlite Pipe ◽  
Peridotite Xenolith ◽  
Diamond Formation

Sulfur isotopic compositions of the lithospheric mantle sulfides from the Udachnaya pipe (Yakutia)

2020 ◽  
Author(s):  
Olga Ilyina ◽  
Alexey Agashev ◽  
Bertrand Moine
Keyword(s):  
Lithospheric Mantle ◽  
Sulfur Isotopes ◽  
Basic Research ◽  
Kimberlite Pipe ◽  
West African ◽  
Udachnaya Pipe ◽  
Depleted Mantle ◽  
Isotope Ratio Mass Spectrometer ◽  
Isotope Study

<p>Sulfide inclusions in Neoproterozoic West African diamonds have revealed mass-independently fractionated sulfur isotopes in them [Smit et.al., 2019]. This feature is a sign of Archean surface changes traced in the mantle. Here we present an S isotope study of the unique fresh mantle deep-seated peridotites, eclogites and pyroxenites with rare or without any secondary alterations from the Udachnaya-East pipe. This research will give better understanding the role of subduction in the formation of the lithospheric mantle under the Siberian craton. Sulfur isotopes (<sup>34</sup>S/<sup>32</sup>S which is denoted as δ<sup>34</sup>S) were measured in the sulfides from eclogites, peridotites and pyroxenites using an Isoprime isotope ratio mass spectrometer (IRMS) with classic configuration with 4 collectors. The sulfides from eclogites are pyrrotite, pentlandites and chalcopyrites. They have δ<sup>34</sup>S values from +0,67 to +3,08 per mil (‰). Sulfides in peridotites are pyrrotite-pentlandite-chalcopyrites assemblages and they have δ<sup>34</sup>S values from +0,22 to +3,55 ‰. These δ<sup>34</sup>S values from eclogites and peridotites are broadly overlap with the field for depleted mantle and chondrites (-1,9 to +0,35‰) [Labidi et.al., 2013; 2014]. Sulfides from pyroxenites are pyrrotite and they have δ<sup>34</sup>S values from -3,62 to +1,49 ‰. These δ<sup>34</sup>S values have a wider range than the estimates for depleted mantle. The δ<sup>34</sup>S values in our samples are close to those in the depleted mantle, but still have deviation from it and do not fractionated. Our data did not detect mass-independently fractionated sulfur isotopes in the mantle samples from the Udachnaya pipe. Thus subduction of the earth’s crust did not play role in the values of sulfur isotopes of the lithospheric mantle sampled by Udachnaya kimberlite pipe. The source of sulfur in these rocks probably was the astenospheric mantle.</p><p>References</p><ol><li>Smit et. al., 2019</li> <li>Labidi et. al., 2013; 2014</li> </ol><p>This study was supported by the Russian Foundation for Basic Research № 18-05-70064</p>

scholarly journals STRUCTURAL-COMPOSITIONAL MODEL OF THE NYURBINSKAYA KIMBERLITE PIPE FORMATION (SREDNE-MARKHA AREA OF THE YAKUTIAN DIAMONDIFEROUS PROVINCE)

2016 ◽  
Vol 7 (3) ◽  
pp. 435-458 ◽  
Author(s):  
A. S. Gladkov ◽  
D. A. Koshkarev ◽  
A. V. Cheremnykh ◽  
F. João ◽  
M. A. Karpenko ◽  
...  
Keyword(s):  
Kimberlite Pipe ◽  
Compositional Model ◽  
Pipe Formation
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