Heterogeneity in kimberlite structure and composition as a reflection of its petrogenesis peculiarities
https://doi.org/10.31242/2618-9712-2023-28-1-9-26
Abstract
New data on the geological structure and petrochemical characteristics of the first kimberlite pipe in the Syuldyukar kimberlite field and its position in the Ygyatta diamond-bearing area are presented. The petrographic identification of the petrochemical varieties of kimberlites in this area was performed for the first time. The compositions of the rockforming and accessory minerals of kimberlites were studied using a modern hardware complex. The results showed that the directed change in the structural and material characteristics of kimberlites from peripheral to central parts in extended vertical bodies of the Syuldyukar tube type is expressed in the replacement of calcium kimberlites by magnesium kimberlites. Mg-kimberlites are characterized by the largest crystals of diamond, garnets, and ilmenites, high concentrations of magnesium, and a number of other components. All of these changes in kimberlites are caused by flow differentiation. This information allowed us to apply the obtained petrological results to the kimberlites of the Syuldyukar tube as search criteria for forecasting and identifying new kimberlite bodies in the Ygyatta diamond-bearing area.
Keywords
Yakut diamond-bearing province,
Syuldyukar pipe,
kimberlite,
petrochemistry,
petrology,
flow differentiation
Supporting agencies: This study was carried out within the framework of the state assignment to the DPMGI SB RAS and IGM SB RAS and financially supported by the Ministry of Science and Higher Education of the Russian Federation. Analytical work was conducted at the “Analytical Center for Multi-Elemental and Isotope Research SB RAS”.
About the Authors
V. A. Minin
Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences
Russian Federation
Russian Federation
MININ, Vladimir Alekseevich, Cand. Sci. (Geology and Mineralogy)
Researcher, Researcher ID: M-2810-2018
Novosibirsk
A. V. Tolstov
Diamond and Precious Metal Geology Institute, Siberian Branch of the Russian Academy of Sciences
Russian Federation
Russian Federation
TOLSTOV, Aleksandr Vasilevich, Dr. Sci (Geology and Mineralogy), Chief Researcher
Yakutsk
M. V. Maltsev
Vilyuiskaya GRE, AK “ALROSA” (PJSC)
Russian Federation
Russian Federation
MALTSEV, Mikhail Viktorovich, Cand. Sci. (Geology and Mineralogy), Deputy Chief Geologistirny
Mirny
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Review
For citations:
Minin V.A., Tolstov A.V., Maltsev M.V. Heterogeneity in kimberlite structure and composition as a reflection of its petrogenesis peculiarities. Arctic and Subarctic Natural Resources. 2023;28(1):9-26. (In Russ.) https://doi.org/10.31242/2618-9712-2023-28-1-9-26
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