Research output: Contribution to journal › Article › peer-review
Petrogenesis and Sources for Rocks of the Rare-Metal Alkaline Burpalа Intrusion (Northern Baikal Region). / Doroshkevich, A. G.; Savatenkov, V. M.; Malyutina, A. V. et al.
In: Petrology, Vol. 33, No. 1, 03.04.2025, p. 40-61.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Petrogenesis and Sources for Rocks of the Rare-Metal Alkaline Burpalа Intrusion (Northern Baikal Region)
AU - Doroshkevich, A. G.
AU - Savatenkov, V. M.
AU - Malyutina, A. V.
AU - Izbrodin, I. A.
AU - Prokopiev, I. R.
AU - Starikova, A. E.
AU - Radomskaya, T. A.
N1 - Geological studies, including analyses of host rocks, were carried out in the framework of the government-financed tasks of the Institute of Geology and Mineralogy and Geological Institute of the Siberian Branch of the Russian Academy of Sciences and Institute of Precambrian Geology and Geochronology of the Russian Academy of Sciences (project nos. 122041400241-5, AAAA-A21-121011390002-2, FMUW-2022-0005). The petrologic-geochemical and isotope (Sr, Nd, Pb, O) studies were financially supported by the Russian Science Foundation, project no. 22-17-00078, https://rscf.ru/en/project/22-17-00078/.
PY - 2025/4/3
Y1 - 2025/4/3
N2 - The paper reports the results of petrologic and geochemical study of the Burpala alkaline intrusion composed of quartz syenites, alkaline and nepheline syenites, including ore-bearing varieties, which is a part of the Late Paleozoic North Baikal Alkaline Province. Chemically, the studied rocks belong to foid monzosyenites, foid syenites and syenites, ranging from agpaitic to miascitic varieties. Close Sr-Nd isotopic characteristics and geochemical patterns confirm the syngenetic nature of magmas that produced nepheline, alkaline, and quartz syenites. A negative Eu anomaly in the REE patterns and sufficiently low Mg# of rocks testify in favor of a prolonged fractional crystallization of rocks from an alkaline-basic melt. Sr-Nd-Pb isotopic and geochemical characteristics of rocks of the Burpala intrusion reflect the predominance of metasomatized lithospheric mantle in their source. The formation of the rocks of the intrusion, according to the trace element and isotopic data, was complicated by the upper crustal assimilation, which likely determined the genetic relationship between nepheline and quartz syenites within the intrusion.
AB - The paper reports the results of petrologic and geochemical study of the Burpala alkaline intrusion composed of quartz syenites, alkaline and nepheline syenites, including ore-bearing varieties, which is a part of the Late Paleozoic North Baikal Alkaline Province. Chemically, the studied rocks belong to foid monzosyenites, foid syenites and syenites, ranging from agpaitic to miascitic varieties. Close Sr-Nd isotopic characteristics and geochemical patterns confirm the syngenetic nature of magmas that produced nepheline, alkaline, and quartz syenites. A negative Eu anomaly in the REE patterns and sufficiently low Mg# of rocks testify in favor of a prolonged fractional crystallization of rocks from an alkaline-basic melt. Sr-Nd-Pb isotopic and geochemical characteristics of rocks of the Burpala intrusion reflect the predominance of metasomatized lithospheric mantle in their source. The formation of the rocks of the intrusion, according to the trace element and isotopic data, was complicated by the upper crustal assimilation, which likely determined the genetic relationship between nepheline and quartz syenites within the intrusion.
KW - Northern Baikal region
KW - alkaline and nepheline syenites
KW - petrogenesis
KW - quartz
KW - sources
UR - https://www.mendeley.com/catalogue/37f1ad34-b235-37c1-a157-8f2872cdb428/
UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-105002870242&origin=inward&txGid=84a1cce383c1a3f29c30707961341099
U2 - 10.1134/S0869591124700280
DO - 10.1134/S0869591124700280
M3 - Article
VL - 33
SP - 40
EP - 61
JO - Petrology
JF - Petrology
SN - 0869-5911
IS - 1
ER -
ID: 65302346