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![Geological map of Tazheran complex, simplified after (Fedorovsky et al., 2009). 1, Cenozoic slope and lacustrine soft sediments; 2–20, Early Paleozoic rocks: 2, Begul complex, aplite and pegmatite; 3, Talovka complex, granite; 4, Aya complex, rare-metal granite and pegmatite; 5–8: pyroxenite-carbonalite complex: brucite carbonalite (5); 9, dolomite-calcite (a) and pyroxenite-xenolith-bearing (b) carbonalite (6), dolomite an, dolomite-calcite carbonalite (7), pyroxenite and nepheline-Ti-augite rocks (8); 9–12, Tazheran complex: subalkaline gabbro and microgabbro (9); nepheline syenite, nepheline syenite-pegmatite, svyatonosite, syenite and Ne-syenite gneiss (10); coarseand medium-grained syenite and syenite gneiss (11), undifferentiated blastomylonitized syenite gneiss and nepheline syenite gneiss (12); 13, 14, Birkhin complex: phase 2, metamorphosed gabbro, monzogabbro, monzonite, and syenite (13); phase 1, metamorphosed mafic subvolcanic rocks, hornfels (14); 15–20, Anga–Begul complex: quarzite (15), marble (16), silicate-carbonate rocks (17), thinly banded amphibolite (18), dolomite marble (19); amphibolite, silicate-carbonate gneiss (20); 21, hornfels; 22, skarns of Central Tazheran shear zone; 23, skarns of Orso–Ulan-Nur shear zone; 24, blastomylonite and ultrablastomylonite; 25, schistosity; 26, bedding; 27, postmetamorphic faults; 28, synmetamorphic strike-slip faults; 29, limits of carbonalite and skarn localized in hinge of Central Tazheran shear loop; 30, quartz veins.]()
![Mafic rocks of Olkhon region in major-element variation diagrams (A–D) and REE patterns (E). A–D: 1, amphibolite of Begul–Anga section; 2, Birkhin and Ulan-Nur gabbro; 3–6, Tazheran complex: Birkhin gabbro (3); Tazheran subalkaline gabbro (4); amphibolite (5); hornfels (6); 7, lamprophyre of Olkhon Island. E: 1, Birkhin and Ulan-Nur gabbro; 2–4, Tazheran complex: Tazheran subalkaline gabbro (2); hornfels (3); amphibolite (4); 5, lamprophyre of Olkhon Island. Normalized according to (Boynton, 1984).]()
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![The (Na2O + K2O)–SiO2 diagram for mafic igneous rocks in the Olkhon area. 1, residual dunites and peridotites; 2, gabbro-pyroxenites in small intrusions; 3, Khuzhir pyroxenites and gabbros;4, Kharikta (Tankhan) gabbros;5, Buguldeyka differentiated mafites; 6, early phase and subalkaline Tazheran gabbros;7, early phase Tazheran gabbro;8, subalkaline and alkaline gabbros of Tazheran dikes; 9, Svyatoy Nos metagab-bros; 10, granitic rocks of this gabbro complex.]()
![Location map of gabbro intrusions in the Olkhon area. 1–4, gabbro intrusions: phase 1 Birkhin complex (1), phase 2 Birkhin complex (2), Ust’-Krestovsky complex (3), Tankhan group of Anga–Sakhyurta zone (a), scapolite-Ti-fassaite pyroxenites of the Chernorud complex of the Chernorud zone (b) of the Anga–Sakhyurta and Chernorud zones, respectively (4); 5, Tazheran syenites and nepheline syenites; 6, collisional suture; 7, gabbro intrusions of the Krestovsky zone. Arabic numerals denote gabbro intrusions. 1–6, Birkhin complex: 1, Buguldeika; 2, Talovskoe, 3, Krestovsky, 4, Bora-Elga, 5, Birkhin, 6, Ulan-Nuur; 7, 8, Ust’-Krestovsky complex: Ust’-Krestovsky intrusion (7) and small intrusions that crosscut Tazheran syenites (8). Roman numerals denote the Krestovsky (I), Anga–Sakhyurta (II), and Chernorud (III) zones. Asterisks show sampling sites of zircons for geochronological analysis. Inset shows location of study area.]()
![Position of the Tazheran massif in the strike-slip structure of the Ol’khon terrane (A), geological scheme (B), fragment from the massif’s detailed map, Tazheran Bay (C), multispectral IKONOS-2 (USA) image, 4 MP (D). A, Birkhin monzogabbros are marked by diagonal ruling; B: 1, metamorphic rocks of Orso region; 2–10, Tazheran–Birkhin region: 2, Birkhin monzogabbroids, 3, calcite marbles, 4, finely banded amphibolites, 5, hornfelses after mafic rocks, 6, granite lode, 7, alkalic syenites with many gabbroid bodies, 8, gabbroids in large dikes, 9, nepheline syenite body of complex morphology, 10, boundaries of the main field of carbonate rock development in the center of the area; 11, blastomylonite sutures and blastomylonitization zones; C: 1, Quaternary deposits; 2, brucite marbles with associated calciphyres; 3, quartzites; 4, gabbroids; 5, undifferentiated nepheline and alkalic syenites; 6, pyroxene mafic granulite; the site where nepheline syenite samples were selected for isotopic studies is starred and that for calciphyres is marked by a triangle. Sampling site for alkalic syenites is beyond the map, 700 m north of that for calciphyres.]()
![The AFM diagram for gabbro-peridotite complexes in the Olkhon area: 1, Khuzhir, 2, Kharikta, 3, Birkhin, 4, Buguldeyka, 5, Tazheran, 6, ultrabasite boudines. Т, tholeütic basalts, CA, calc-alkaline basalts. The dashed line is the line of Khuzhir gabbro differenti-ates.]()
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![Spider-diagrams and normalized REE patterns in gabbro from the Krestovsky zone. a, b: Birkhin complex, phase 1: Krestovsky (1), Ulan-Nuur (2), Birkhin (3), Talovskoe (4), and Bora-Elga (5) intrusions; c, d: Birkhin complex, phase 2: Birkhin (6), Buguldeika (7), and Ulan-Nuur (8) intrusions; e, f: Ust’-Krestovsky complex: 9, Tazheran trachydolerite, 10, Ust’-Krestovsky monzogabbro. REE abundances (a, c, e) are normalized to chondrite CI, according to Sun and McDonough (1989), trace element abundances (b, d, f) are normalized to primitive mantle, according to Sun and McDonough (1989).]()
![Gabbro of Krestovsky zone in major-element variation diagrams. 1, 2, gabbro of Ust’-Krestovsky complex: 1, Tazheran trachydolerite, 2, Ust’-Krestovsky monzogabbro; 3–5, gabbro of Birkhin complex, phase 2: Birkhin (3), Buguldeika (4), and Ulan-Nuur (5) intrusions; 6–10, gabbro of of Birkhin complex, phase 1: Krestovsky (6), Ulan-Nuur (7), Birkhin (8), Talovskoe (9), and Bora-Elga (10) intrusions. Fields in TAS classification diagram are according to Middlemost (1994): I, peridotite; II, gabbro; III, gabbrodiorite; IV, diorite; V, feldspar gabbro; VI, monzogabbro; VII, monzodiorite; VIII, monzonite.]()
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![Schematics of the Ol’khon area structure, after (Fedorovsky et al., 1995), simplified. 1, Krestovsky diorites and granitoids, 2, gabbroids: 1, Buguldeyka and Ulanganta, 2, Tazheran, 3, Kharikta, 4, Khuzhir; 3–6 sediments of the Ol’khon complexes: 3, granite-gneiss domes, 4, meta-graywacke zones and amphibolites at their periphery, 5, tectonic slices composed of marbles, quartzites and diopside-rich schists; 6, rocks of the Anga complexes (metavolcanites, marbles, quartzites); 7, cataclasites in the northern Birkhin; 8, collisional suture (a), and boundaries of major shear zones (b). Sites of zircon age determination: PO2539, for the Krestovsky diorite: 493 ± 4 Ma (core), 477 ± 3 Ma (rim); PO2519, for the Sharanur granite dome: 502 ± 11 (core), 477 ± 4 (rim).]()
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![Position of restitic (alpine-type) ultramafic rocks in the structures of the Olkhon Region (western Baikal coast). Compiled on the basis of the Fedorovsky’s geological map (2004) and data of Pavlenko (1983, 1992), Mekhonoshin et al. (2005), Khromykh (2006), and Vladimirov et al. (2011). 1, Quaternary deposits; 2, Early Proterozoic structural-material complexes of the Siberian Craton; 3, blastomylonites of the collisional suture; 4–8, Early Paleozoic structural-material complexes of the Olkhon Region: 4, metamorphic rocks of the Chernorud zone (granulite facies); 5, metamorphic rocks of the Shida zone (amphibolite facies); 6, metamorphic rocks of the Anga–Sakhyurty zone (amphibolite facies); 7, metamorphic rocks of the Orso complex (epidote–amphibolite facies); 8, metamorphic rocks of the Anga zone (epidote–amphibolite facies); 9–12, intrusive complexes: 9, restitic ultramafic bodies and clusters of boudins of the Shida complex (V–Є1); 10, Birkha gabbro complex (Є1), 11, undifferentiated granitoid bodies and veins of the Sharanur (in the Anga–Sakhyurty zone and Chernorud) and Ain (in the Anga zone) complexes; (Є3–O1), 12, Tazheran massif of alkaline rocks (Є3–O1), 13, study areas (1, Shida; 2, Tog; 3, Kul’chitskii fold).]()
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1-20 OF 51 RESULTS FOR
Tazheran Complex
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Geological map of Tazheran complex, simplified after ( Fedorovsky et al., 2... 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. 4. Geological map of Tazheran complex, simplified after ( Fedorovsky et al., 2009 ). 1 , Cenozoic slope and lacustrine soft sediments; 2–20 , Early Paleozoic rocks: 2 , Begul complex, aplite and pegmatite; 3 , Talovka complex, granite; 4 , Aya complex, rare-metal granite and pegmatite
Image
Mafic rocks of Olkhon region in major-element variation diagrams ( A – D ) ... 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. 5. Mafic rocks of Olkhon region in major-element variation diagrams ( A – D ) and REE patterns (E). A – D : 1 , amphibolite of Begul–Anga section; 2 , Birkhin and Ulan-Nur gabbro; 3–6 , Tazheran complex: Birkhin gabbro ( 3 ); Tazheran subalkaline gabbro ( 4 ); amphibolite ( 5 ); hornfels
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.
...Fig. 4. Geological map of Tazheran complex, simplified after ( Fedorovsky et al., 2009 ). 1 , Cenozoic slope and lacustrine soft sediments; 2–20 , Early Paleozoic rocks: 2 , Begul complex, aplite and pegmatite; 3 , Talovka complex, granite; 4 , Aya complex, rare-metal granite and pegmatite...
FIGURES
Image
The (Na 2 O + K 2 O)–SiO 2 diagram for mafic igneous rocks in the Olkhon a... Available to Purchase
in Specifics of the Caledonian Collision in the Ol’khon Region (Lake Baikal, Russia)
> Russian Geology and Geophysics
Published: 01 April 2021
and subalkaline Tazheran gabbros; 7 , early phase Tazheran gabbro; 8 , subalkaline and alkaline gabbros of Tazheran dikes; 9 , Svyatoy Nos metagab-bros; 10 , granitic rocks of this gabbro complex.
Image
Location map of gabbro intrusions in the Olkhon area. 1–4 , gabbro intrusi... Available to Purchase
in Compositions of gabbro intrusions in the Krestovsky zone ( western Baikal region ): A record of plume–suprasubduction mantle interaction
> Russian Geology and Geophysics
Published: 01 October 2017
of the Chernorud zone ( b ) of the Anga–Sakhyurta and Chernorud zones, respectively ( 4 ); 5 , Tazheran syenites and nepheline syenites; 6 , collisional suture; 7 , gabbro intrusions of the Krestovsky zone. Arabic numerals denote gabbro intrusions. 1–6, Birkhin complex: 1, Buguldeika; 2, Talovskoe, 3
Image
Position of the Tazheran massif in the strike-slip structure of the Ol’khon... Available to Purchase
in Carbonatites in collisional settings and pseudo-carbonatites of the Early Paleozoic Ol’khon collisional system
> Russian Geology and Geophysics
Published: 01 December 2009
Fig. 1. Position of the Tazheran massif in the strike-slip structure of the Ol’khon terrane ( A ), geological scheme ( B ), fragment from the massif’s detailed map, Tazheran Bay ( C ), multispectral IKONOS-2 (USA) image, 4 MP ( D ). A , Birkhin monzogabbros are marked by diagonal ruling; B : 1
Image
The AFM diagram for gabbro-peridotite complexes in the Olkhon area: 1 , Kh... Available to Purchase
in Specifics of the Caledonian Collision in the Ol’khon Region (Lake Baikal, Russia)
> Russian Geology and Geophysics
Published: 01 April 2021
Fig. 4. The AFM diagram for gabbro-peridotite complexes in the Olkhon area: 1 , Khuzhir, 2 , Kharikta, 3 , Birkhin, 4 , Buguldeyka, 5 , Tazheran, 6 , ultrabasite boudines. Т, tholeütic basalts, CA, calc-alkaline basalts. The dashed line is the line of Khuzhir gabbro differenti-ates.
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.
... and subalkaline Tazheran gabbros; 7 , early phase Tazheran gabbro; 8 , subalkaline and alkaline gabbros of Tazheran dikes; 9 , Svyatoy Nos metagab-bros; 10 , granitic rocks of this gabbro complex. ...
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Journal Article
Geochemical factors for endogenic mineral formation in the bottom sediments of the Tazheran lakes ( Baikal area ) Available to Purchase
Journal: Russian Geology and Geophysics
Publisher: Novosibirsk State University
Published: 01 October 2015
Russ. Geol. Geophys. (2015) 56 (10): 1437–1450.
...V.D. Strakhovenko; E.P. Solotchina; Yu.S. Vosel’; P.A. Solotchin Abstract We studied recent sedimentation in small saline and brackish lakes located in the Ol’khon region (western Baikal area) with arid and semiarid climate. The lakes belong to the Tazheran system; it is a series of compactly...
FIGURES
Image
Spider-diagrams and normalized REE patterns in gabbro from the Krestovsky z... Available to Purchase
in Compositions of gabbro intrusions in the Krestovsky zone ( western Baikal region ): A record of plume–suprasubduction mantle interaction
> Russian Geology and Geophysics
Published: 01 October 2017
), and Ulan-Nuur ( 8 ) intrusions; e , f : Ust’-Krestovsky complex: 9 , Tazheran trachydolerite, 10 , Ust’-Krestovsky monzogabbro. REE abundances ( a , c , e ) are normalized to chondrite CI, according to Sun and McDonough (1989) , trace element abundances ( b , d , f ) are normalized to primitive
Image
Gabbro of Krestovsky zone in major-element variation diagrams. 1 , 2 , ga... Available to Purchase
in Compositions of gabbro intrusions in the Krestovsky zone ( western Baikal region ): A record of plume–suprasubduction mantle interaction
> Russian Geology and Geophysics
Published: 01 October 2017
Fig. 4. Gabbro of Krestovsky zone in major-element variation diagrams. 1 , 2 , gabbro of Ust’-Krestovsky complex: 1 , Tazheran trachydolerite, 2 , Ust’-Krestovsky monzogabbro; 3 – 5 , gabbro of Birkhin complex, phase 2: Birkhin ( 3 ), Buguldeika ( 4 ), and Ulan-Nuur ( 5 ) intrusions; 6 – 10
Journal Article
Carbonatites in collisional settings and pseudo-carbonatites of the Early Paleozoic Ol’khon collisional system Available to Purchase
Journal: Russian Geology and Geophysics
Publisher: Novosibirsk State University
Published: 01 December 2009
Russ. Geol. Geophys. (2009) 50 (12): 1091–1106.
...Fig. 1. Position of the Tazheran massif in the strike-slip structure of the Ol’khon terrane ( A ), geological scheme ( B ), fragment from the massif’s detailed map, Tazheran Bay ( C ), multispectral IKONOS-2 (USA) image, 4 MP ( D ). A , Birkhin monzogabbros are marked by diagonal ruling; B : 1...
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Journal Article
STRUCTURAL PECULIARITIES OF THE OL’KHON REGION ACCORDING TO ELECTRICAL PROSPECTING DATA ( Western Prebaikalia ) Available to Purchase
Journal: Russian Geology and Geophysics
Publisher: Novosibirsk State University
Published: 01 February 1998
Russ. Geol. Geophys. (1998) 39 (2): 279–284.
... of the Tazheran Formation. In our opinion, the most important result of TEM is finding of a gently dipping high-conductance zone represented by rocks of the first complex. On geoelectrical section, its upper boundary, traced for a distance of more than 2 km, looks like a series of subhorizontal segments...
FIGURES
Image
Schematics of the Ol’khon area structure, after ( Fedorovsky et al., 1995 )... Available to Purchase
in Specifics of the Caledonian Collision in the Ol’khon Region (Lake Baikal, Russia)
> Russian Geology and Geophysics
Published: 01 April 2021
Fig. 1. Schematics of the Ol’khon area structure, after ( Fedorovsky et al., 1995 ), simplified. 1 , Krestovsky diorites and granitoids, 2 , gabbroids: 1, Buguldeyka and Ulanganta, 2, Tazheran, 3, Kharikta, 4, Khuzhir; 3–6 sediments of the Ol’khon complexes: 3 , granite-gneiss domes, 4
Journal Article
Compositions of gabbro intrusions in the Krestovsky zone ( western Baikal region ): A record of plume–suprasubduction mantle interaction Available to Purchase
Journal: Russian Geology and Geophysics
Publisher: Novosibirsk State University
Published: 01 October 2017
Russ. Geol. Geophys. (2017) 58 (10): 1139–1153.
... of the Chernorud zone ( b ) of the Anga–Sakhyurta and Chernorud zones, respectively ( 4 ); 5 , Tazheran syenites and nepheline syenites; 6 , collisional suture; 7 , gabbro intrusions of the Krestovsky zone. Arabic numerals denote gabbro intrusions. 1–6, Birkhin complex: 1, Buguldeika; 2, Talovskoe, 3...
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Journal Article
Thermodynamic model of formation of carbonates and uranium mineral phases in lakes Namshi-Nur and Tsagan-Tyrm ( Cisbaikalia ) Available to Purchase
Journal: Russian Geology and Geophysics
Publisher: Novosibirsk State University
Published: 01 April 2018
Russ. Geol. Geophys. (2018) 59 (4): 374–385.
...V.D. Strakhovenko; O.L. Gas’kova Abstract The Tazheran lakes are located compactly in the small Tazheran steppe area. Their bottom sediments are predominantly various calcite–dolomite carbonates, and their waters are rich in uranium. The studies have shown that the main process in these lakes...
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Journal Article
GEOELECTRICAL SURVEYS IN THE OL’KHON REGION: METHODS, RESULTS, AND TECTONIC IMPLICATIONS Available to Purchase
Journal: Russian Geology and Geophysics
Publisher: Novosibirsk State University
Published: 01 February 2004
Russ. Geol. Geophys. (2004) 45 (2): 253–265.
... with minor graphite contents; 3 — Tazheran Formation: graphite-bearing quartzites, marbles, and schists; 4 — Kuchulga Formation: amphibole-biotite and garnet-biotite-sillimanite gneisses; 5 — Lower formation: amphibole and amphibole-biotite schists; 6 — pyroxenites and gabbro-pyroxenites; 7...
FIGURES
Image
Position of restitic (alpine-type) ultramafic rocks in the structures of th... Available to Purchase
in Restitic ultramafic rocks in the Early Caledonian collisional system of western Cisbaikalia
> Russian Geology and Geophysics
Published: 01 October 2013
bodies and clusters of boudins of the Shida complex (V–Є 1 ); 10, Birkha gabbro complex (Є 1 ), 11, undifferentiated granitoid bodies and veins of the Sharanur (in the Anga–Sakhyurty zone and Chernorud) and Ain (in the Anga zone) complexes; (Є 3 –O 1), 12, Tazheran massif of alkaline rocks (Є 3 –O 1
Journal Article
SHRIMP U-Pb AGES OF PEROVSKITE FROM YAKUTIAN KIMBERLITES Available to Purchase
Journal: Russian Geology and Geophysics
Publisher: Novosibirsk State University
Published: 01 January 1997
Russ. Geol. Geophys. (1997) 38 (1): 97–105.
..., and for lithospheric basement studies based on kimberlite-borne xenoliths. There is also the possibility of significant time differences between the various porphyritic and breccia phases of complex individual pipes. Brakhfogel [ 2 ] has associated kimberlite activity in the region with periodic reactivation of deep...
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Journal Article
Major and trace element composition of olivine from magnesian skarns and silicate marbles Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 February 2021
American Mineralogist (2021) 106 (2): 206–215.
... are selected from contact zones of carbonate rocks with alkaline intrusives (Tazheran, Russia, and Hodzha-Achkan, Kyrgyzstan) (e.g., Doroshkevich et al. 2017 ; Pautov et al. 2013 ), and another five samples are from skarns of phlogopite deposits in Yakutia, Russia, (Katalakh, Emeldhak, and Timpton...
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