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![Generalized tectonic framework of Olkhon terrane, modified after (Fedorovsky et al., 2005). 1–4, Olkhon terrane: metamorphosed mafic volcanics with marble and quartzite layers (1), mostly granitic gneiss, gneiss, and migmatite (2), gneiss and amphibolite (Orso complex) (3); subalkaline gabbro (4); 5, collisional suture of ‘terrane–continent’ system (boundary of Siberian craton); 6, sites of sampling for geochronology.]()
![Mafic rocks of Olkhon terrane in Ce/Nb–Th/Nb diagram (Saunders et al., 1988). DMM is depleted MORB mantle component, RSC is recycled residual slab component, SDC is subduction-derived component. Lines are mixing trends of components. Compositions of upper continental crust, average bulk crust, and IAB are according to (Dampare et al., 2008), N-MORB and E-MORB are after (Sun and McDonough, 1989). Legend same as in Fig. 4.]()
![Meta-sedimentary rocks of Olkhon terrane in Neelov’s diagram (Neelov, 1980): a = Al/Si (at.), b = Fe3+ + Fe2+ + Mn + Ca + Mg (at.). 1, two-pyroxene and clinopyroxene-scapolitic granulites of Khadarta metamorphic complex; 2, Khoboi granulite; 3, Orso two-mica gneiss and two-mical gneiss with garnet. Fields: I, monomictic (quartz) psammite, ultrasilicite; II, oligomictic psammite, silicite; III, felsic tuffite, subsilicite, IIIa-1, arkose, subarkose, IIIa-2, polymictic sandstone, IIIb, greywacke sandstone, IIIv, carbonate and carbonate-ferrous sandstone; IV, oligomictic siltstone, felsic tuffite, IVa, polymictic siltstone, IVb, greywacke siltstone, IVc, carbonate siltstone, aluminous psammite, IVd, silty carbonate; V–Va, silty-pelitic mudstone, Vb, carbonate and ferrous mudstone.]()
![Meta-sedimentary rocks of Olkhon terrane in Ti/Zr–La/Sc diagram (Bhatia and Crook, 1986). Legend same as in Fig. 6.]()
![Generalized geology of the Olkhon terrane (after Fedorovsky et al. 1995), showing locations of studied samples.]()
![Maps of the Olkhon collision zone. (a) Tectonic map of the Olkhon collision system (after Fedorovsky et al., 2010). The legend is as follows: (1,2) Siberian continental plate; (1) weakly deformed Riphean-Palaeozoic sedimentary cover, (2) Palaeoproterozoic metamorphic and granitic basement; (3–6) Early Palaeozoic collisional system, Olkhon composite terrane (stack of shear slabs composed of metamorphic and magmatic rocks of different age), (3) slabs formed by various metamorphic rocks including tholeitic basalts (500 Ma), (4) compositionally diverse metamorphic rocks with subalkaline basalts (500 Ma), (5) leptinite-amphibolite Orso complex, (6) slabs formed by granitic gneisses and migmatites (460–470 Ma) with signatures of Archaean-Palaeoproterozoic protolith; (7a) collision suture (margin of the Siberian craton and Olkhon terrane, blastomylonites composed of rocks of the craton and Olkhon terrane, among blastomylonites also erratic blocks of Palaeozoic granulites), (7b) main shear zone; (8) sutures of blastomylonites between shear zones; (9) Birkhin massif. (b) Geological map of the Birkhin massif (after Fedorovsky, 2004). The legend is as follows: (1) modern alluvium; (2) metamorphic rocks of the Olkhon complex; (3,4) metamorphic rocks of the Angin complex (including the Orso complex), (3) marble, (4) other metamorphic rock (meta-effusive rock of intermediate and mafic composition, meta-breccia, quartzite, highly aluminous rocks, garnet-biotite gneiss, marble melange); (5) gabbro, monzogabbro, diorite and their metamorphosed analogues; (6) granite; (7) syn-metamorphic blastomylonite shear zones and thrust faults; (8) area of work.]()
![Precambrian microcontinents and early Palaeozoic metamorphic terranes in the Sayan–Baikalian region of southern Siberia. Age of granulite event for the Derba terrane is after Nozhkin et al. (2004), for the Kitoykin terrane after Donskaya et al. (2000), for the Slyudyanka terrane after Salnikova et al. (1998) and for the Olkhon terrane from this study.]()
![Primitive mantle-normalized (Sun & McDonough 1989) trace element patterns for c. 500 Ma quartz syenites (▴) and granites (▪) of the Olkhon terrane.]()
![Generalized tectonics of Olkhon collisional system, modified after (Fedorovsky, 1997). 1, 2, Siberian continental plate: 1, weakly deformed Riphean–Paleozoic sedimentary cover; 2, Paleoproterozoic metamorphic and granitic basement; 3–6, Early Paleozoic collisional system, Olkhon composite terrane (collage of blocks with different compositions and ages): compositionally diverse metamorphic rocks with tholeiite basalts (500 Ma) (3); compositionally diverse metamorphic rocks with subalkaline basalts (500 Ma) (4); leptinite-amphibolite Orso complex (5); granite gneiss and migmatite (460–470 Ma) with signature of Archean and Paleoproterozoic protolith (6); 7a, collisional suture (boundary of Siberian craton and Olkhon terrane; blastomylonitized rocks of craton and terrane, Paleozoic granulite enclaves in blastomylonites); 7b, Main shear zone; 8, blastomylonite sutures between groups of (a) and individual (b) shear zones.]()
![Primitive mantle-normalized (Sun and McDonough, 1989) multielement patterns for mafic rocks of Olkhon terrane. 1, Khadarta two-pyroxene granulite; 2, Orso amphibolite.]()
![a – Tectonic framework of the Siberian craton (Donskaya, 2020): 1 – Archean terranes; 2 – Paleoproterozoic terranes; 3 – Archean suture zones; 4–6 – orogenic belts and collisional zones of different ages: 2.00–1.95 Ga (4), 1.95–1.90 Ga (5), and 1.90–1.87 Ga (6); 7 – exposed basement inlier; 8 – contours of tectonic blocks assembled into the Akitkan orogen: T – Tonod, Ch – Chuya, S – Sarma, G – Goloustnaya.]()
![Strike-slip tectonic framework. a: Synmetamorphic shear sutures in southwestern Olkhon collisional system (Olkhon area). 1, Siberian craton, Early Precambrian; 2, Olkhon compositional terrane, Early Paleozoic; 3, Primorsky fault scarp in Baikal rift system; 4, collisional suture of the Olkhon terrane–Siberian continent system; 5, blastomylonite sutures with ophiolite; 6, blastomylonite sutures without ophiolite. Numerals stand for names of ophiolite sutures: 1, Gorkhon-Kharikta in Main shear zone; 2, Orso (Hatcher); 3, Gyzgi-Nur; 4, Shida-Barsoi. b: Panchromatic LANDSAT-7 ETM+ image of Olkhon area. c: Collage of shear zones of different ages in Olkhon area. 1, Siberian craton, Early Precambrian; 2, active Primorsky fault scarp in Baikal rift system; 3, Early Paleozoic collisional suture; 4, compositionally diverse metamorphic rocks with tholeiite basalts (500 Ma); 5, granite gneiss and migmatite (460–470 Ma) with signature of Archean and Paleoproterozoic protolith; 6, compositionally diverse metamorphic rocks with subalkaline basalts (500 Ma); 7, leptinite-amphibolite Orso complex; 8, blastomylonite sutures between separate zones; 9, ages of magmatism and metamorphism in main groups of zones.]()
![Composition of rhodonite on the diagram Ca–Mn–Fe + Mg (Winter et al., 1981) from gondites. 1, Usutai deposit; 2, Olkhon terrane; 3, Khamar-Daban terrane in accord with (Koneva et al., 1998). The field of rhodonite composition from Nangodi Belt (Melcher, 1995) is represented. Minerals: Rdn, rhodonite, Pxm, pyroxmangite, Bst, bustamite.]()
![Evolution of active margin of Barguzin microcontinent and origin of Olkhon terrane. 1, Precambrian basement of Siberian craton; 2, Precambrian sediments; 3, island arc complex; 4, backarc basin complex; 5, oceanic crust; 6, syncollisional intrusions; 7, thrusts.]()
![Composition of amphibole on the diagram Mg–Mn–Fetot from gondites: Usutai deposit (crosses), Olkhon terrane in accord with (Koneva et al., 1998) and from the Nangodi Belt and the Sausar Formation in accord with (Melcher, 1995). Minerals: Rdn, rhodonite, Pxm, pyrox-mangite, Bst, bustamite.]()
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Olkhon Terrane
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Journal Article
Petrology, geochronology, and tectonic implications of c . 500 Ma metamorphic and igneous rocks along the northern margin of the Central Asian Orogen (Olkhon terrane, Lake Baikal, Siberia) Available to Purchase
Journal: Journal of the Geological Society
Publisher: Geological Society of London
Published: 01 January 2008
Journal of the Geological Society (2008) 165 (1): 235–246.
... the evolution of the Central Asian Orogenic Belt at the time of accretion of continental terranes and island arcs. Records of this event are well preserved within the Siberian craton–Central Asian Orogenic Belt transition zone in Lake Baikal region, particularly in the Olkhon terrane. Our results establish...
FIGURES
Journal Article
The Olkhon metamorphic terrane in the Baikal region: An Early Paleozoic collage of Neoproterozoic active margin fragments Available to Purchase
Journal: Russian Geology and Geophysics
Publisher: Novosibirsk State University
Published: 01 May 2010
Russ. Geol. Geophys. (2010) 51 (5): 447–460.
...D.P. Gladkochub; T.V. Donskaya; V.S. Fedorovsky; A.M. Mazukabzov; A.N. Larionov; S.A. Sergeev Abstract We report data from the Khadarta, Khoboi, and Orso metamorphic complexes of the Olkhon terrane in the western Baikal region. High-grade rocks in the three complexes may have been derived from...
FIGURES
Image
Generalized tectonic framework of Olkhon terrane, modified after ( Fedorovs... Available to Purchase
in The Olkhon metamorphic terrane in the Baikal region: An Early Paleozoic collage of Neoproterozoic active margin fragments
> Russian Geology and Geophysics
Published: 01 May 2010
Fig. 2. Generalized tectonic framework of Olkhon terrane, modified after ( Fedorovsky et al., 2005 ). 1–4 , Olkhon terrane: metamorphosed mafic volcanics with marble and quartzite layers ( 1 ), mostly granitic gneiss, gneiss, and migmatite ( 2 ), gneiss and amphibolite (Orso complex) ( 3
Image
Mafic rocks of Olkhon terrane in Ce/Nb–Th/Nb diagram ( Saunders et al., 198... Available to Purchase
in The Olkhon metamorphic terrane in the Baikal region: An Early Paleozoic collage of Neoproterozoic active margin fragments
> Russian Geology and Geophysics
Published: 01 May 2010
Fig. 5. Mafic rocks of Olkhon terrane in Ce/Nb–Th/Nb diagram ( Saunders et al., 1988 ). DMM is depleted MORB mantle component, RSC is recycled residual slab component, SDC is subduction-derived component. Lines are mixing trends of components. Compositions of upper continental crust, average bulk
Image
Meta-sedimentary rocks of Olkhon terrane in Neelov’s diagram ( Neelov, 1980... Available to Purchase
in The Olkhon metamorphic terrane in the Baikal region: An Early Paleozoic collage of Neoproterozoic active margin fragments
> Russian Geology and Geophysics
Published: 01 May 2010
Fig. 6. Meta-sedimentary rocks of Olkhon terrane in Neelov’s diagram ( Neelov, 1980 ): a = Al/Si (at.), b = Fe 3+ + Fe 2+ + Mn + Ca + Mg (at.). 1 , two-pyroxene and clinopyroxene-scapolitic granulites of Khadarta metamorphic complex; 2 , Khoboi granulite; 3 , Orso two-mica gneiss and two
Image
Meta-sedimentary rocks of Olkhon terrane in Ti/Zr–La/Sc diagram ( Bhatia an... Available to Purchase
in The Olkhon metamorphic terrane in the Baikal region: An Early Paleozoic collage of Neoproterozoic active margin fragments
> Russian Geology and Geophysics
Published: 01 May 2010
Fig. 7. Meta-sedimentary rocks of Olkhon terrane in Ti/Zr–La/Sc diagram ( Bhatia and Crook, 1986 ). Legend same as in Fig. 6 .
Image
Generalized geology of the Olkhon terrane (after Fedorovsky et al . 1995 ... Available to Purchase
in Petrology, geochronology, and tectonic implications of c . 500 Ma metamorphic and igneous rocks along the northern margin of the Central Asian Orogen (Olkhon terrane, Lake Baikal, Siberia)
> Journal of the Geological Society
Published: 01 January 2008
Fig. 2. Generalized geology of the Olkhon terrane (after Fedorovsky et al . 1995 ), showing locations of studied samples.
Image
Maps of the Olkhon collision zone. ( a ) Tectonic map of the Olkhon collisi... Available to Purchase
in Galuskinite, Ca 7 (SiO 4 ) 3 (CO 3 ), a new skarn mineral from the Birkhin gabbro massif, Eastern Siberia, Russia
> Mineralogical Magazine
Published: 01 October 2011
basement; (3–6) Early Palaeozoic collisional system, Olkhon composite terrane (stack of shear slabs composed of metamorphic and magmatic rocks of different age), (3) slabs formed by various metamorphic rocks including tholeitic basalts (500 Ma), (4) compositionally diverse metamorphic rocks
Image
Precambrian microcontinents and early Palaeozoic metamorphic terranes in th... Available to Purchase
in Petrology, geochronology, and tectonic implications of c . 500 Ma metamorphic and igneous rocks along the northern margin of the Central Asian Orogen (Olkhon terrane, Lake Baikal, Siberia)
> Journal of the Geological Society
Published: 01 January 2008
after Salnikova et al . (1998) and for the Olkhon terrane from this study.
Image
Primitive mantle-normalized ( Sun & McDonough 1989 ) trace element patt... Available to Purchase
in Petrology, geochronology, and tectonic implications of c . 500 Ma metamorphic and igneous rocks along the northern margin of the Central Asian Orogen (Olkhon terrane, Lake Baikal, Siberia)
> Journal of the Geological Society
Published: 01 January 2008
Fig. 5. Primitive mantle-normalized ( Sun & McDonough 1989 ) trace element patterns for c . 500 Ma quartz syenites (▴) and granites (▪) of the Olkhon terrane.
Image
Generalized tectonics of Olkhon collisional system, modified after ( Fedoro... Available to Purchase
in Strike-slip tectonics and subalkaline mafic magmatism in the Early Paleozoic collisional system of the western Baikal region
> Russian Geology and Geophysics
Published: 01 May 2010
, Olkhon composite terrane (collage of blocks with different compositions and ages): compositionally diverse metamorphic rocks with tholeiite basalts (500 Ma) ( 3 ); compositionally diverse metamorphic rocks with subalkaline basalts (500 Ma) ( 4 ); leptinite-amphibolite Orso complex ( 5 ); granite gneiss
Image
Primitive mantle-normalized ( Sun and McDonough, 1989 ) multielement patter... Available to Purchase
in The Olkhon metamorphic terrane in the Baikal region: An Early Paleozoic collage of Neoproterozoic active margin fragments
> Russian Geology and Geophysics
Published: 01 May 2010
Fig. 4. Primitive mantle-normalized ( Sun and McDonough, 1989 ) multielement patterns for mafic rocks of Olkhon terrane. 1 , Khadarta two-pyroxene granulite; 2 , Orso amphibolite.
Image
a – Tectonic framework of the Siberian craton ( Donskaya, 2020 ): 1 – Ar... Available to Purchase
in Early Proterozoic Ilikta Formation: a Record of the Akitkan Orogen Evolution (Southern Siberian Craton)
> Russian Geology and Geophysics
Published: 01 May 2024
sediments; 2 – early Paleozoic rocks of the Olkhon terrane of the Central Asian Orogenic Belt (CAOB); 3 – 5 – clastic and carbonate deposits of the Baikal Group, including the Kachergat ( 3 ), Uluntui ( 4 ), and Goloustnaya ( 5 ) formations; 6 – Nugan Formation clastic sediments; 7 – dolerite dikes
Image
Strike-slip tectonic framework. a : Synmetamorphic shear sutures in southw... Available to Purchase
in Strike-slip tectonics and subalkaline mafic magmatism in the Early Paleozoic collisional system of the western Baikal region
> Russian Geology and Geophysics
Published: 01 May 2010
Fig. 2. Strike-slip tectonic framework. a : Synmetamorphic shear sutures in southwestern Olkhon collisional system (Olkhon area). 1 , Siberian craton, Early Precambrian; 2 , Olkhon compositional terrane, Early Paleozoic; 3 , Primorsky fault scarp in Baikal rift system; 4 , collisional suture
Image
Composition of rhodonite on the diagram Ca–Mn–Fe + Mg ( Winter et al., 1981... Available to Purchase
in Isotope-Geochemical Composition, Mineralogy, and Genesis of Mn-Bearing Rocks of the Gondite Association of the Ikat Terrane (Eastern Baikal Region)
> Russian Geology and Geophysics
Published: 01 February 2019
Fig. 6. Composition of rhodonite on the diagram Ca–Mn–Fe + Mg ( Winter et al., 1981 ) from gondites. 1 , Usutai deposit; 2 , Olkhon terrane; 3 , Khamar-Daban terrane in accord with ( Koneva et al., 1998 ). The field of rhodonite composition from Nangodi Belt ( Melcher, 1995 ) is represented
Image
Evolution of active margin of Barguzin microcontinent and origin of Olkhon ... Available to Purchase
in The Olkhon metamorphic terrane in the Baikal region: An Early Paleozoic collage of Neoproterozoic active margin fragments
> Russian Geology and Geophysics
Published: 01 May 2010
Fig. 13. Evolution of active margin of Barguzin microcontinent and origin of Olkhon terrane. 1 , Precambrian basement of Siberian craton; 2 , Precambrian sediments; 3 , island arc complex; 4 , backarc basin complex; 5 , oceanic crust; 6 , syncollisional intrusions; 7 , thrusts.
Image
Composition of amphibole on the diagram Mg–Mn–Fe tot from gondites: Usutai... Available to Purchase
in Isotope-Geochemical Composition, Mineralogy, and Genesis of Mn-Bearing Rocks of the Gondite Association of the Ikat Terrane (Eastern Baikal Region)
> Russian Geology and Geophysics
Published: 01 February 2019
Fig. 7. Composition of amphibole on the diagram Mg–Mn–Fe tot from gondites: Usutai deposit (crosses), Olkhon terrane in accord with ( Koneva et al., 1998 ) and from the Nangodi Belt and the Sausar Formation in accord with ( Melcher, 1995 ). Minerals: Rdn, rhodonite, Pxm, pyrox-mangite, Bst
Journal Article
Geochemical evolution of the early Paleozoic collisional magmatism from autochthonous migmatites and granitoids to multiphase granite intrusions ( Sharanur and Aya complexes, Baikal Region ) Available to Purchase
Journal: Russian Geology and Geophysics
Publisher: Novosibirsk State University
Published: 01 December 2018
Russ. Geol. Geophys. (2018) 59 (12): 1616–1625.
...) and depleted in Sr, Ba, Eu, Li, and LREE. The origin of the autochthonous and intrusive granitoids is related to early Paleozoic collision events within the Olkhon metamorphic terrane, while the formation of syncollisional granitoids is best explained by both melting of the crust protolith (Sharanur complex...
FIGURES
Journal Article
Strike-slip tectonics and subalkaline mafic magmatism in the Early Paleozoic collisional system of the western Baikal region Available to Purchase
Journal: Russian Geology and Geophysics
Publisher: Novosibirsk State University
Published: 01 May 2010
Russ. Geol. Geophys. (2010) 51 (5): 534–547.
..., Olkhon composite terrane (collage of blocks with different compositions and ages): compositionally diverse metamorphic rocks with tholeiite basalts (500 Ma) ( 3 ); compositionally diverse metamorphic rocks with subalkaline basalts (500 Ma) ( 4 ); leptinite-amphibolite Orso complex ( 5 ); granite gneiss...
FIGURES
Journal Article
Specifics of the Caledonian Collision in the Ol’khon Region (Lake Baikal, Russia) Available to Purchase
Journal: Russian Geology and Geophysics
Publisher: Novosibirsk State University
Published: 01 April 2021
Russ. Geol. Geophys. (2021) 62 (4): 389–400.
... a fore-arc basin of the Anga-Talanchan arc ( Shkol’nik et al., 2003 ). All these facts point to the preexisting single Khamar Daban-Olkhon terrane, which at the time of the onset of early Paleozoic collision was near the Siberian craton, as shown in Fig. 9 ( Makrygina et al., 2007 ). Fig. 8...
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