Pd/Pt IMBALANCE IN LAVAS AND INTRUSIONS OF THE NORILSK-TALNAKH ORE REGION

T V Dudkin,A V Ivanov,A E Marfin,V S Kamenetsky

doi:10.5800/gt-2021-12-4-0560

T V Dudkin, A V Ivanov + Show 2 more

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https://doi.org/10.5800/gt-2021-12-4-0560

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Abstract

The paper considers the Pd/Pt ratio in the ores of the Norilsk-1 and Talnakh deposits associated with the Permian-Triassic intrusions of the Norilsk type in comparison with that in the lavas of the same age in the Norilsk region. The Pd/Pt mean ratio is 1 in lavas and 2–4 times higher than that in ores and barren horizons of the Norilsk-1 and Talnakh intrusions. Such an increase implies that these elements were borrowed by magma from small and medium-sized crust deposits associated with the previous stage of Permian island-arc volcanism.

Highlights

The paper considers the Pd/Pt ratio in the ores of the Norilsk-1 and Talnakh deposits associated with the Permian-Triassic intrusions of the Norilsk type in comparison with that in the lavas of the same age in the Norilsk region
The Pd/Pt mean ratio is 1 in lavas and 2–4 times higher than that in ores and barren horizons of the Norilsk-1 and Talnakh intrusions. Such an increase implies that these elements were borrowed by magma from small and medium-sized crust deposits associated with the previous stage of Permian island-arc volcanism
Однако вряд ли можно объяснить увели чение Pd/Pt отношений от месторождения Норильск-1 к Талнахскому в одном и том же первичном типе, на пример вкрапленных руд, метаморфическими и мета соматическими процессами

Summary

Introduction

Pd/Pt IMBALANCE IN LAVAS AND INTRUSIONS OF THE NORILSK-TALNAKH ORE REGION В работе рассмотрены значения Pd/Pt отношения в рудах месторождений Норильск-1 и Тал нахское, связанных с пермско-триасовыми интрузиями норильского типа, а также проведено сравнение с та ковым отношением в одновозрастных лавах Норильского района. (а) – схематическая геологическая карта Норильско-Талнахского региона; (б, в) – разрезы месторождений: (б) – Норильск-1 [Sluzhenikin et al, 2016], (в) – Талнахское [Duzhikov, Distler, 1988].

Results

Conclusion