干旱区生态环境知识资源中心(Arid): Detrital zircon U-Pb-Hf isotopes and whole-rock geochemistry of Ediacaran-Silurian clastic sediments of the Uzbek Tienshan: sources and tectonic implications

Arid

DOI	10.1080/00206814.2021.2010134
	Detrital zircon U-Pb-Hf isotopes and whole-rock geochemistry of Ediacaran-Silurian clastic sediments of the Uzbek Tienshan: sources and tectonic implications
	Konopelko, Dmitry; Safonova, Inna; Perfilova, Inna; Biske, Yury; Mirkamalov, Rustam; Divaev, Farid; Kotler, Pavel; Obut, Olga; Wang, Bo; Sun, Min; Soloshenko, Natalia
通讯作者	Safonova, I (corresponding author)，Novosibirsk State Univ, Novosibirsk 630090, Russia.
来源期刊	INTERNATIONAL GEOLOGY REVIEW
ISSN	0020-6814
EISSN	1938-2839
出版年	2021-12
英文摘要	The paper presents first high-precision data, U-Pb detrital zircon ages, whole-rock geochemistry, Hf-in-zircon and whole-rock Nd isotopes, from pre-Devonian (Ediacaran and Silurian) clastic sediments (sandstones) of the Tamdytau, Bukantau and Nuratau mountainous ranges of the Kyzylkum Desert and Nuratau Range in the western Uzbek Tienshan. The sediments form a turbidite-type complex associated with ocean plate stratigraphy units (oceanic pillow basalt, chert, siliceous mudstone and siltstone) and arc volcanic rocks. Four sandstone samples from the Tamdytau and Northern Nuratau Mts. (Besapan and Kaltadavan formations, respectively) yielded maximum depositional ages in the range of 570-540 Ma. These ages indicate the formation of pre-Devonian sedimentary units during a relatively narrow time interval from the latest Neoproterozoic (Ediacaran) to the earliest Cambrian, i.e. ca. 50-70 Myr. Five samples of turbidites from the Bukantau Mts. (Baimen Fm.) yielded a maximal depositional age of ca. 440 Ma, i.e. early Silurian (Llandovery). The petrographic, major and trace element compositions, as well as epsilon Nd(t) values ranging from -16 to -9 of those sandstones suggest their generally mature character and derivation from recycled orogens with a limited contribution of juvenile crust material. All sandstone samples yielded similar detrital zircon U-Pb age patterns characterized by major peaks at 650-570, 870-730, 1050-900 and 2400 Ma and by a smaller peak at ca. 1800 Ma. These patterns are similar to the U-Pb age spectra from the basement of the Tarim Craton. However, the Kyzylkum basement may contain a larger proportion of late Archaean rocks and igneous formations related to Ediacaran - earliest Cambrian orogenic events. All samples showing U-Pb detrital zircon age spectra with peaks at 650-570 Ma carry relatively large amounts of zircon grains with juvenile Hf isotope characteristics, i.e. positive epsilon Hf(t) (up to +10) suggesting their derivation from continental or Island arcs. The presence of exotic tectonic blocks composed of Ediacaran arc-type rocks hosted by the accretionary complex of the South Tienshan suggests that an extended arc system once existed at the southern convergent margin of the Turkestan Ocean. That arc system provided clastic material for the Palaeozoic sediments of the South Tienshan, but was probably destroyed by tectonic erosion during early Palaeozoic oceanic subduction.
英文关键词	Southern Tienshan Kyzylkum Desert turbidite sandstones Ediacaran arcs Turkestan Ocean subduction erosion
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000735819800001
WOS关键词	ASIAN OROGENIC BELT ; OCEAN PLATE STRATIGRAPHY ; CRUSTAL EVOLUTION ; SOUTH TIANSHAN ; TARIM CRATON ; ARC SYSTEM ; NW CHINA ; SHAN ; PROVENANCE ; AGE
WOS类目	Geology
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377040
作者单位	[Konopelko, Dmitry; Biske, Yury] St Petersburg State Univ, Inst Earth Sci, St Petersburg, Russia; [Konopelko, Dmitry; Safonova, Inna; Perfilova, Inna; Kotler, Pavel] Novosibirsk State Univ, Geol Geophys Dept, Novosibirsk, Russia; [Safonova, Inna; Perfilova, Inna; Kotler, Pavel] Sobolev Inst Geol & Mineral SB RAS, Novosibirsk, Russia; [Mirkamalov, Rustam; Divaev, Farid] Inst Mineral Resources, Tashkent, Uzbekistan; [Obut, Olga] Trofimuk Inst Petr Geol & Geophys SB RAS, Novosibirsk, Russia; [Wang, Bo] Nanjing Univ, Dept Earth Sci, State Key Lab Mineral Deposits Res, Nanjing, Peoples R China; [Sun, Min] Univ Hong Kong, Dept Earth Sci, Hong Kong, Peoples R China; [Soloshenko, Natalia] Zavaritskiy Inst Geol & Geochem UrB RAS, Ekaterinburg, Russia
推荐引用方式 GB/T 7714	Konopelko, Dmitry,Safonova, Inna,Perfilova, Inna,et al. Detrital zircon U-Pb-Hf isotopes and whole-rock geochemistry of Ediacaran-Silurian clastic sediments of the Uzbek Tienshan: sources and tectonic implications[J],2021.
APA	Konopelko, Dmitry.,Safonova, Inna.,Perfilova, Inna.,Biske, Yury.,Mirkamalov, Rustam.,...&Soloshenko, Natalia.(2021).Detrital zircon U-Pb-Hf isotopes and whole-rock geochemistry of Ediacaran-Silurian clastic sediments of the Uzbek Tienshan: sources and tectonic implications.INTERNATIONAL GEOLOGY REVIEW.
MLA	Konopelko, Dmitry,et al."Detrital zircon U-Pb-Hf isotopes and whole-rock geochemistry of Ediacaran-Silurian clastic sediments of the Uzbek Tienshan: sources and tectonic implications".INTERNATIONAL GEOLOGY REVIEW (2021).