Isotope data on the age and genesis of layered basic-ultrabasic intrusions in the Kola Peninsula and northern Karelia, northeastern Baltic Shield

Saved in:
Online Access: Get full text
doi: 10.1016/0301-9268(93)90076-E
Authors:Balashov, Yuriy A.; Bayanova, Tamara B.; Mitrofanov, Felix P.
Author Affiliations:Primary:
Russian Academy of Sciences, Kola Science Centre, Geological Institute, Apatity, Russian Federation
Volume Title:Baltic Shield
Volume Authors:Gorbatschev, Roland, editor
Source:Precambrian Research, 64(1-4), p.197-205; 2nd symposium on the Baltic Shield, Lund, Sweden, June 1990, edited by Roland Gorbatschev. Publisher: Elsevier, Amsterdam, International. ISSN: 0301-9268
Publication Date:1993
Note:In English. 16 refs.Special volume; illus. incl. 2 tables, sketch map
Summary:New U-Pb zircon ages and Sm-Nd data are presented for layered basic-ultrabasic intrusions of the Kola Peninsula and northern Karelia in the northeastern part of the Baltic Shield. All ages are in the range between 2.5 and 2.4 Ga, but there appear to exist three phases of intrusion. Thus the Monchegorsk Intrusion and the Fedorovy-Pansky Massif have ages between 2493 and 2470 Ma, the Kivakka and Lukkulaisvaara massifs of the Olanga group of intrusions between 2445 and 2435 Ma, while the Imandra Lopolith is 2396±7 Ma old. A narrow range of negative εNd(T) values between -2.3 and -1.2 suggests formation by partial melting of a semi-homogeneous enriched mantle source.
Subjects:Absolute age; Archean; Dates; Genesis; IGCP; Intrusions; Isochrons; Layered intrusions; Mafic composition; Nesosilicates; Orthosilicates; Partial melting; Pb/Pb; Precambrian; Silicates; Sm/Nd; U/Pb; Ultramafic composition; Zircon; Zircon group; Asia; Commonwealth of Independent States; Europe; Fennoscandian Shield; Karelia Russian Federation; Kola Peninsula; Russian Federation; Fedorovy-Pansky Massif; Imandra Lopolith; Kivakka Massif; Lukkulaisvaara Massif; Monchegorsk Intrusion; Northeastern Baltic Shield; Olanga Group
Abstract Numbers:94M/4807
Record ID:1994014120
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands
Tags: Add Tag
No Tags, Be the first to tag this record!
Be the first to leave a comment!
You must be logged in first