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Introduction
Additional affiliations
January 2006 - present
August 1985 - May 1993
Geological enterprise "Yuzhkazgeologiya" ("South Kazakhstan geology")
Position
- Head of Department
August 1993 - December 2005
Education
November 1991 - March 1993
September 1980 - June 1985
Publications
Publications (105)
Geochronological, geochemical, and structural studies of magmatic and metamorphic complexes within the Kyrgyz North Tianshan (NTS) revealed an extensive area of early Palaeozoic magmatism with an age range of 540–475 Ma. During the first episode at 540–510 Ma, magmatism likely occurred in an intraplate setting within the NTS microcontinent and in a...
Detrital zircon dating allows us to elucidate the age and provenance of siliciclastic strata of the Sarydjaz and Ichkebash formations in the Middle Tianshan of eastern Kyrgyzstan, previously thought to be of the Middle or Late Ordovician age. New data indicate that the upper part of the Ichkebash Formation contains Lower Silurian strata, previously...
![Fig. 1. Geological map of the study area (modified after [3, 6]). 1–4,...](publication/378830412/figure/fig1/AS:11431281228472619@1710019787757/Geological-map-of-the-study-area-modified-after-3-6-1-4-Middle-Tianshan-1_Q320.jpg)
Detrital zircon dating allows us to elucidate the age and provenance of siliciclastic strata of the Sarydjaz and Ichkebash formations in the Middle Tianshan of eastern Kyrgyzstan, previously thought to be of the Middle or Late Ordovician age. New data indicate that the upper part of the Ichkebash Formation contains Lower Silurian sediments, previou...
The combined petrographic, petrological, geochemical and geochronological study of the Neoproterozoic gneisses of the Sarychabyn and Baskan complexes of the Junggar Alataw of South Kazakhstan elucidate the Precambrian tectonic evolution of the Aktau–Yili terrane. It is one of the largest Precambrian crustal blocks in the western Central Asian oroge...
In the present contribution, we aim to determine the age of the oldest arc-related volcanic units in the North Tianshan of Kyrgyzstan (NTS) to better understand the early evolution of subduction systems in the western part of the Central Asian Orogenic Belt. We conducted zircon U–Pb dating (LA–ICP–MS) on andesitic tuffs from the Sultansary and Tash...
With the aim to improve our understanding of the age and genesis of the Neoproterozoic diamictites of the Middle Tianshan of Kyrgyzstan, we studied the late Precambrian strata of the Sandalash, Talas and Chatkal Ranges. The results of detrital zircon dating indicate that diamictites were deposited in the Cryogenian and Ediacaran. Diamictites in the...
The Upper Precambrian section in the Sandalash, Talas, and Chatkal ranges are studied to refine the age and genesis of Neoproterozoic diamictites of the Middle Tianshan. The results of detrital zircon dating show that diamictites were deposited in the Cryogenian and Ediacaran. The diamictites in the lower part
of the Shorashu Formation comprise til...
Abstract:
Multidisciplinary geochronological, isotopic, chemical, and facial studies in the Malyi Karatau Range (MK) of South Kazakhstan elucidate the Precambrian stratigraphic framework and evolution of the Ishim Middle Tianshan microcontinent (IMT) in the western Central Asian Orogenic Belt. Detrital zircon and apatite U-Pb ages for siliciclastic...
A detailed structural study showed that the Mesoproterozoic Karadjilga granite-gneiss massif of the Kyrgyz North Tianshan represents a sheet intrusion, concordant to the bedding of the host Mesoproterozoic metasedimentary strata. The massif has a complex internal structure with strain gradients from unfoli-ated granite to mylonite. The boundaries o...
Детальное структурно-геологическое картирование показало, что мезопротерозойский Караджилгинский гранито-гнейсовый массив Северного Тянь-Шаня является пластовым интрузивным телом, субсогласным напластованию вмещающих метаосадочных толщ. Массив имеет сложное внутреннее строение с широкими вариациями степени деформированности пород – от неразгнейсова...
For the first time, Sr-chemostratigraphic study and Pb-Pb isotope dating of Precambrian carbonates of the Kyrgyz North Tianshan were carried out. We studied limestones of the Senkeltei Formation in the Kochkorka anticlinorium and limestones of the Suek Formation in the Burkhan anticlinorium. The obtained Sr isotope data indicate that the Suek and S...
Впервые проведено Sr-хемостратиграфическое и Pb-Pb-изотопно-геохронологическое изучение докембрийских карбонатных пород Северного Тянь-Шаня. Объектом исследования в Кочкорском антиклинории стали известняки сенкельтейской свиты, а в Бурханском антиклинории - известняки суекской свиты. Полученные Sr-изотопные данные показывают, что сенкельтейская и с...
Караджилгинский массив, сложенный гранитоидами позднего мезопротерозоя, располагается на южном обрамлении Макбальского антиклинория Северного Тянь-Шаня. Детальное картирование показало, что массив имеет интрузивные контакты, локально осложненные срывами. Внутренние деформации массива имеют крайне неоднородный характер. По степени деформированности...
The Karaterek ophiolite represents a remnant of a previously unknown early Paleozoic ocean basin in the Kyrgyz Middle Tianshan (MTS) and sheds new light on the accretionary history of the western Central Asian Orogenic Belt (CAOB). Late Cambrian (~495–485 Ma, this study) and Middle Ordovician (~470–460 Ma) conodont ages support more than 30 Ma of s...
![Fig. 1. Geological map of Talas Alatau Range [9], modified. (1)...](profile/Dmitriy-Alexeiev/publication/350637533/figure/fig1/AS:1009244392411138@1617634022142/Geological-map-of-Talas-Alatau-Range-9-modified-1-Chiimtash-Formation-2-4_Q320.jpg)
The Early Neoproterozoic (851 ± 4 Ma) age of the bimodal basalt-rhyolite volcanic series, exposed on the southern slope of the Talas Alatau Range of northwest Kyrgyzstan, was established by U-Th-Pb (SHRIMP) zircon dating. High concentrations of titanium, iron, and phosphorus in basalts, as well as the distribution of trace elements, similar to thos...
По результатам U–Th–Pb (SIMS)-датирования установлен ранненеопротерозойский (851 ± 4 млн лет) возраст бимодальной риолит-базальтовой серии, обнажающейся на южном склоне хр. Таласский Алатау, северо-западный Кыргызстан. Повышенные концентрации титана, железа и фосфора в базальтах, а также характер распределения редких элементов, близкий к OIB, указы...
On the basis of a detailed study of 39 sections in the Djangdjir and Kokshaal ranges of the South Tianshan (Kyrgyzstan), the conodont zonation of deep-water facies of the Tournaisian, Visean, and Serpukhovian stages was specified. Nine conodont zones, including three new ones, and one unit in the rank of layers with conodonts were distinguished. Th...
По результатам изучения 39 разрезов в хребтах Джангджир и Кокшаал детализирована схема зонального расчленения по конодонтам глубоководных отложений турнейского, визейского и серпуховского ярусов Южного Тянь-Шаня (Кыргызстан). В схеме выделяется девять конодонтовых зон, из них три новых, и один уровень в ранге слоев с конодонтами. Глубоководный хара...
Based on the results of U–Th–Pb (SIMS) dating, an Early Neoproterozoic (924 ± 4 Ma) age was obtained for granite–gneiss of the Sarychabyn Complex, which is one of the oldest complexes in the Junggar Alataw Range. This value constrains the minimum age of the metasedimentary rocks of the Sarychabyn Group hosting granite–gneiss as well. The most likel...
Based on the results of U-Th-Pb (SIMS) dating, an Early Neoproterozoic (924 ± 4 Ma) age was obtained for granite-gneiss of the Sarychabyn Complex, which is one of the oldest complexes in the Junggar Alataw Range. This value constrains the minimum age of the metasedimentary rocks of the Sarychabyn Group hosting granite-gneiss as well. The most likel...
LA-ICP-MS U-Pb dating of detrital zircons reveals two levels of accumulation of Proterozoic quartzites in the Kyrgyz North Tianshan. The quartzites of the Makbal Formation in the core of the Makbal anticlinorium have a maximum depositional age of 1.7 Ga and characterize the oldest stage of accumulation of quartzites in the western Central Asian Oro...
LA-ICP-MS U–Pb dating of detrital zircons reveals two levels of accumulation of Proterozoic quartzites in the Kyrgyz North Tianshan. The quartzites of the Makbal Formation in the core of the Makbal anticlinorium have a maximum depositional age of 1.7 Ga and characterize the oldest stage of accumulation of quartzites in the western Central Asian Oro...
The oldest magmatic rocks from the South Tianshan orogen of Kyrgyzstan (STS) are important for better understanding of the Neoproterozoic and early Palaeozoic evolution of the southwestern Central Asian Orogenic Belt. Bulk rock major and trace element and Sm-Nd isotopic composition and zircon U-Pb ages of granitoids from mélange blocks reveal two p...
Ophiolite assemblages of the South Tianshan fold-and-thrust-belt (STS) track the seafloor dynamics of the late Cambrian to Carboniferous Turkestan Ocean in the western Central Asian Orogenic Belt. We interpret new geochronological and geochemical data for the Mailisu ophiolite from western Kyrgyzstan as evidence for an early Silurian incipient subd...
U-Pb dating of detrital zircons from metamorphic and unmetamorphosed siliciclastic units in northern, central, and southern parts of the late Paleozoic South Tianshan (STS) orogen allows us to elucidate depositional ages and provenances of studied deposits and provide important insights into Paleozoic tectonics and evolution of the southwest Centra...
The field revision of the Carboniferous and Lower Permian stratigraphy of the northern Bog-dashan (South Junggar, Northwest China) shows that the Lower to Middle Carboniferous island arc volcanic rocks, widely developed in this region, are overlapped everywhere by carbonate and terrigenous-carbonate sediments, containing occasional lava flows and o...
1 геологический институт раН, Москва, россия 2 институт наук о Земле Санкт-Петербургского государственного университета, Санкт-Петербург, россия 3 институт геологии НаН киргизской республики, Бишкек, кыргызстан
The proposed Triassic age of oceanic subduction and high-pressure/low-temperature (HP-LT) metamorphism in the South Tianshan orogen (STS) of the southwestern Central Asian Orogenic Belt needs to be reexamined on the basis of field relationship and precise age dating. Our biostratigraphic study in the Atbashi Range of southern Kyrgyzstan indicates t...
New stratigraphic data indicate that carbonate sedimentation in the axial part of the Chinese South Tianshan (STS) occurred continuously from the Early and Middle Devonian tо the latest Carboniferous. This reflects steady subsidence in quiet tectonic regime and excludes major collisional events in the STS during this time. Pre-Carboniferous structu...
![Fig. 1. Geological map of the Karatau Range after [8, 14] with changes....](profile/Dmitriy-Alexeiev/publication/324587703/figure/fig1/AS:616720498708485@1524049033779/Geological-map-of-the-Karatau-Range-after-8-14-with-changes-1a-Position-of-the_Q320.jpg)
U–Pb dating of detrital zircon from the Kokdjot Group and Bolshekaroi Formation (Malyi Karatau) yielded for all the samples age clusters at about 800–805, 855–890, 1980–2100, and 2440–2470 Ma. The Kolmogorov–Smirnov test suggests they have identical provenance sources. The Kokdjot Group and Bolshekaroi Formation ages are presumably Neoproterozoic,...
U-Pb-dating of detrital zircons from the Kokdjot group and Bolshekaroi Formation in the Malyi (Lesser) Karatau Range revealed detrital zircons in all samples have similar age peaks at 800-805 Ma, 855-890 Ma, 1980-2100 Ma and 2440-2470 Ma similar with those in the Tarim Craton. The Kolmogorov-Smirnov test indicates that studied rocks have the same p...
This is a copy of original author's version of 12 sheets of "State Geological Map of the USSR, scale 1:50000, Malyi Karatau series, South Kazakhstan." The map and explanatory note were prepared for publication in 1993 by D.V. Alexeiev as the senior author in the Geological enterprise "Yuzhkazgeologiya" (South Kazakhstan Geology) in Almaty, but were...
The passive margin carbonate platform in the Middle Tien Shan rests on Givetian–
Frasnian red siliciclastic strata. It evolved from an attached carbonate platform in the Famennian
and early Tournaisian to an isolated carbonate platform in the late Tournaisian to early Bashkirian.
The open-ocean side of the platform was reef-rimmed, whereas the cont...
We provide new field observations and isotopic data for key areas of the Central Asian Orogenic Belt (CAOB), reiterating our previous assessment that no excessive crustal growth occurred during its ca. 800 Ma long orogenic evolution. Many Precambrian blocks (microcontinents) identified in the belt are exotic and are most likely derived from the nor...
We present new palaeomagnetic data for Cambrian and Ordovician volcanic and sedimentary rocks from the Kyrgyz North Tianshan (NTS) and review available data from the southwestern Central Asian Orogenic Belt (CAOB) to elucidate the tectonic history and evolution of this region during the early Palaeozoic. We observed a coherent evolution of the NTS...
The Karatau–Talas–Ferghana Fault (KTF) extending for 1500 km from Turgai to western Tarim
is one of the world’s largest intracontinental strike-slip faults. This paper overviews the evolution of the KTF,
providing insight into its relatively poorly studied northern segment in the Karatau Range and Turgai, known
as the Main Karatau Fault (MKF). The...
We provide new field observations and isotopic data for key areas of the Central Asian Orogenic Belt (CAOB), reiterating that no excessive crustal growth occurred during its ca. 800 Ma long orogenic evolution. Many Precambrian blocks (microcontinents) identified in the belt are exotic and are most likely derived from the northern margin of Gondwana...
New geological, geochronological and isotopic data reveal a previously unknown arc system that evolved south of the Kyrgyz Middle Tianshan (MTS) microcontinent during the Middle and Late Ordovician, 467-444 Ma ago. The two fragments of this magmatic arc are located within the Bozbutau Mountains and the northern Atbashi Range, and a marginal part of...
The history of the Late Palaeozoic convergence and collisions in the South Tian Shan, Tarim, and South Junggar has been considered based on new geological and geochronological data. The Late Palaeozoic (Pennsylvanian and Permian) in this region represents a distinct phase in the regional tectonic history and, thus, corresponds to the original meani...
No abstract is available for this article.
A stratigraphic and structural study was carried out in the central part of the Chinese South Tianshan (STS) within a 50–100 km-wide transect centered on the Dushanzi-Kuqa road (83°–85° E). Our data elucidate the tectonic structure and evolution of the Palaeozoic sedimentary basin, document overthrust structures in the late Carboniferous-early Perm...
We report detrital zircon ages for Precambrian and early Palaeozoic metasediments from the Tianshan orogen in Kyrgyzstan, an important component of the Central Asian Orogenic Belt and compare these with published ages from the Chinese Tianshan and the Tarim craton. These data provide information on possible source terrains and suggest that Precambr...
We argue that the production of mantle-derived or juvenile continental crust during the accretionary history of the Central Asian Orogenic Belt (CAOB) has been grossly overestimated. This is because previous assessments only considered the Palaeozoic evolution of the belt, whereas its accretionary history already began in the latest Mesoproterozoic...
The geodynamic settings of the evolution of Cenozoic basins in the North and Middle Tien Shan and their Paleozoic framework have been estimated from a kinematic analysis and detailed structural geological mapping of key sites. Two stages of their development in different geomechanical settings are distinguished. It is suggested that in the late Oli...
High-pressure and ultrahigh-pressure (UHP) eclogite-bearing metamorphic assemblages in the North Tianshan of Kyrgyzstan are known from the Aktyuz and Makbal areas, where eclogites and garnet amphibolites are associated with continental rocks such as granitoid gneisses in Aktyuz and shallow-water clastic (passive margin?) me- tasediments in Makbal....
High-pressure and ultrahigh-pressure (UHP) eclogite-bearing metamorphic assemblages in the North Tianshan of Kyrgyzstan are known from the Aktyuz and Makbal areas, where eclogites and garnet amphibolites are associated with continental rocks such as granitoid gneisses in Aktyuz and shallow-water clastic (passive margin?) metasediments in Makbal. We...
The paleogeography of the Altaids and its kinematic and tectonic evolution during the final collision and amalgamation of Eurasia is still poorly known. Addressing this problem, a paleomagnetic study has been undertaken on Paleozoic sedimentary rocks from the Karatau, Southern Kazakhstan. Stepwise thermal demagnetization reveals the presence of a h...
The NW-trending Talas–Ferghana Fault (TFF) in Kyrgyzstan, Central Asia, is one of the largest intracontinental
strike-slip faults in the world. It extends over a distance of more than 2000 km from southern
Tourghai to western Tarim and exhibits a maximum dextral offset of �200 km during the late Palaeozoic
to present. The history of the fault provi...
The North Tianshan orogenic belt in Kyrgyzstan consists predominantly of Neoproterozoic to early Paleozoic
assemblages and tectonically interlayered older Precambrian crystalline complexes and formed during early
Paleozoic accretionary and collisional events. One of the oldest continental fragments of late Mesoproterozoic
(Grenvillian) age occurs w...
The North Tianshan orogenic belt in Kyrgyzstan consists predominantly of Neoproterozoic to early Paleozoic assemblages and tectonically interlayered older Precambrian crystalline complexes and formed during early Paleozoic accretionary and collisional events. One of the oldest continental fragments of late Mesoproterozoic (Grenvillian) age occurs w...
The Aktyuz metamorphic terrane in the Kyrgyz northern Tianshan consists of granitoid gneisses and migmatites with subordinate paragneisses, greenschists, presumed meta-ophiolites, and garnet amphibolite dykes that contain HP eclogite relicts. The gneisses and migmatites were previously considered to be Archaean and Palaeoproterozoic in age on the b...
A detailed paleomagnetic investigation has been carried out on
sedimentary and volcanic rocks of Paleozoic age in the Kyrgyz Tien Shan
in order to elucidate the paleotectonic and paleogeographic parameters
for the evolution of the southern part of the Central Asian Orogenic
Belt (CAOB) during Paleozoic times. The paleomagnetic data obtained so
far...
Aiming to resolve contradictions in tectonic models and to establish a correlation between Chinese and Kyrgyz sectors of the South Tian Shan we carried out stratigraphic and structural studies in Chinese part of the belt along the Bayinbuluk—Kuqa transect. New data indicate that Chinese South Tian Shan is dominated by top-to-the-south structures, w...
A detailed paleomagnetic investigation has been carried out on
sedimentary and volcanic rocks of Paleozoic age in the Kyrgyz Tien Shan
in order to elucidate the paleotectonic and paleogeographic parameters
for the evolution of the Central Asian Orogenic Belt (CAOB) during
Paleozoic times. The paleomagnetic data obtained so far generally agree
with...
The mechanism and age of Palaeozoic accretion in the Central Asian Orogenic Belt remain poorly constrained. One of the most complex belts extends from the Kokchetav area in northern Kazakhstan to the Kyrgyz northern Tianshan. It represents an assemblage of small blocks with Palaeoproterozoic continental crust, intervening slivers containing early P...
Kazakhstan represented a major site of accretionary crustal growth during early Palaeozoic and was incorporated into Eurasia as a single continent after collisions with Siberia, Baltica and Tarim during the late Carboniferous and early Permian. The mechanism of this accretion and the geodynamic setting during different epochs are a major subject of...
