Research output: Contribution to journal › Article › peer-review
40Ar/39Ar Age of Gold Ore Metasomatites of the Albyn Deposit, Mongol–Okhotsk Fold Belt. / Kadashnikova, A. Yu; Sorokin, A. A.; Ponomarchuk, A. V. et al.
In: Russian Journal of Pacific Geology, Vol. 13, No. 6, 01.11.2019, p. 575-584.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - 40Ar/39Ar Age of Gold Ore Metasomatites of the Albyn Deposit, Mongol–Okhotsk Fold Belt
AU - Kadashnikova, A. Yu
AU - Sorokin, A. A.
AU - Ponomarchuk, A. V.
AU - Travin, A. V.
AU - Ponomarchuk, V. A.
AU - Dementienko, A. I.
AU - Eirish, L. V.
N1 - Publisher Copyright: © 2019, Pleiades Publishing, Ltd.
PY - 2019/11/1
Y1 - 2019/11/1
N2 - The paper reports the results of 40Ar/39Ar geochronological studies of the muscovite–quartz–albite metasomatites of the ore bodies and host rocks of the Albyn deposit located in the Selemdzha–Kerbi structural zone of the eastern part of the Mongol–Okhotsk Fold Belt. To a first approximation, the age of the hydrothermal ore process responsible for the formation of the Albyn deposit can be estimated within an interval of 131–130 Ma. At the same time, we cannot exclude the existence of an earlier stage of this process at ~135 Ma, although this assumption requires further substantiation. A close age estimate (~134–130 Ma) was obtained earlier for the ore metasomatites of the Malomyr deposit located in the same structural zone. There are no data on the magmatic manifestations of close age within the considered region, which makes it impossible to relate the ore mineralization of the Albyn deposit with magmatic processes. At the same time, the age of the thermal event superimposed on the host rocks of the Afanasiev Formation is 131 ± 3 Ma, which likely indicates the regional nature of this event. We suggest that a significant role in the mobilization, redistribution of ore matter, and formation of the Albyn deposit was played by large-scale deformations accompanied by hydrothermal activity.
AB - The paper reports the results of 40Ar/39Ar geochronological studies of the muscovite–quartz–albite metasomatites of the ore bodies and host rocks of the Albyn deposit located in the Selemdzha–Kerbi structural zone of the eastern part of the Mongol–Okhotsk Fold Belt. To a first approximation, the age of the hydrothermal ore process responsible for the formation of the Albyn deposit can be estimated within an interval of 131–130 Ma. At the same time, we cannot exclude the existence of an earlier stage of this process at ~135 Ma, although this assumption requires further substantiation. A close age estimate (~134–130 Ma) was obtained earlier for the ore metasomatites of the Malomyr deposit located in the same structural zone. There are no data on the magmatic manifestations of close age within the considered region, which makes it impossible to relate the ore mineralization of the Albyn deposit with magmatic processes. At the same time, the age of the thermal event superimposed on the host rocks of the Afanasiev Formation is 131 ± 3 Ma, which likely indicates the regional nature of this event. We suggest that a significant role in the mobilization, redistribution of ore matter, and formation of the Albyn deposit was played by large-scale deformations accompanied by hydrothermal activity.
KW - Albyn deposit
KW - geochronology
KW - mineralization
KW - Mongol–Okhotsk Fold Belt
KW - METAL DEPOSIT
KW - STANOVOI METALLOGENIC ZONE
KW - EASTERN PART
KW - MAGMATISM
KW - GEOCHRONOLOGY
KW - Mongol-Okhotsk Fold Belt
KW - TRANSBAIKALIA
KW - MINERALIZATION
KW - GEOCHEMISTRY
KW - VOLCANOPLUTONIC BELT
KW - WESTERN-PART
UR - http://www.scopus.com/inward/record.url?scp=85079709759&partnerID=8YFLogxK
U2 - 10.1134/S1819714019060046
DO - 10.1134/S1819714019060046
M3 - Article
AN - SCOPUS:85079709759
VL - 13
SP - 575
EP - 584
JO - Russian Journal of Pacific Geology
JF - Russian Journal of Pacific Geology
SN - 1819-7140
IS - 6
ER -
ID: 23594650