scholarly journals South China provenance of the lower-grade Penglai Group north of the Sulu UHP orogenic belt, eastern China: Evidence from detrital zircon ages and Nd-Hf isotopic composition

2007 ◽  
Vol 41 (1) ◽  
pp. 29-45 ◽  
Author(s):  
XIANG-HUI LI ◽  
FUKUN CHEN ◽  
JING-HUI GUO ◽  
QIU-LI LI ◽  
LIE-WEN XIE ◽  
...  
Keyword(s):  
Isotopic Composition ◽  
South China ◽  
Detrital Zircon ◽  
Eastern China ◽  
Orogenic Belt ◽  
Lower Grade ◽  
Detrital Zircon Ages ◽  
Hf Isotopic Composition

A Tarim-South China-North India connection in the periphery of Rodinia: Constraints from provenance of middle Neoproterozoic sedimentary rocks in the Altyn Tagh orogen, southeastern Tarim

2020 ◽  
Author(s):  
Qian Liu
Keyword(s):  
South China ◽  
Detrital Zircon ◽  
Sedimentary Rocks ◽  
Detrital Zircons ◽  
Close Linkage ◽  
North India ◽  
Hf Isotopes ◽  
Altyn Tagh ◽  
Detrital Zircon Ages ◽  
Rule Out

<p>Locating Tarim during assembly and breakup of Supercontinent Rodinia remains enigmatic, with different models advocating a Tarim-Australia linkage or a location between Australia and Laurentia at the heart of unified Rodinia. In this study, zircon U-Pb dating results first revealed middle Neoproterozoic sedimentary rocks in the Altyn Tagh orogen, southeastern Tarim. These sedimentary rocks were deposited between ca. 880 and 750 Ma in a rifting-related setting slightly prior to breakup of Rodinia at ca. 750 Ma. A compilation of Neoproterozoic geological records indicates that the Altyn Tagh orogen in southeastern Tarim underwent ca. 1.0-0.9 Ga collision and ca. 850-600 Ma rifting related to assembly and breakup of Rodinia, respectively. In order to place Tarim in Rodinia, available detrital zircon U-Pb ages and Hf isotopes from Meso- to Neoproterozoic sedimentary rocks in relevant Rodinia blocks are compiled. Comparable detrital zircon ages (at ca. 0.9, 1.3-1.1, and 1.7 Ga) and Hf isotopes indicate a close linkage among southeastern Tarim, Cathaysia, and North India, but rule out a North or West Australian affinity for Tarim. In addition, detrital zircons from northern Tarim exhibit a prominent age peak at ca. 830 Ma with minor spectra at ca. 1.9 and 2.5 Ga but lack Mesoproterozoic ages, which are comparable to those from northern and western Yangtze. Together with comparable geological responses to assembly and breakup of Rodinia, a new Tarim-South China-North India connection is inferred in the periphery of Rodinia.</p>

Detrital zircon Hf isotopic composition indicates long-distance transport of North Gondwana Cambrian–Ordovician sandstones

Geology ◽  
2011 ◽  
Vol 39 (10) ◽  
pp. 955-958 ◽  
Author(s):  
Navot Morag ◽  
Dov Avigad ◽  
Axel Gerdes ◽  
Elena Belousova ◽  
Yehudit Harlavan
Keyword(s):  
Isotopic Composition ◽  
Detrital Zircon ◽  
Long Distance ◽  
Long Distance Transport ◽  
North Gondwana ◽  
Hf Isotopic Composition ◽  
Distance Transport

Proterozoic microcontinents in the western Central Asian Orogenic Belt (Kyrgyzstan and Kazakhstan): relationship with Gondwana

2020 ◽  
Author(s):  
Andrey K. Khudoley ◽  
Dmitriy V. Alexeiev ◽  
S. Andrew DuFrane
Keyword(s):  
Detrital Zircon ◽  
Orogenic Belt ◽  
Detrital Zircons ◽  
Central Asian Orogenic Belt ◽  
Significant Similarity ◽  
Widespread Occurrence ◽  
The North ◽  
Central Asian ◽  
Rfbr Grant ◽  
Detrital Zircon Ages

<p>Proterozoic microcontinents are widespread in the western part of the Central Asian Orogenic Belt, but their origin remains poorly constrained. The U-Pb dating of detrital zircons in Proterozoic rocks of the southern Kazakhstan and Kyrgyz North Tianshan elucidate depositional ages and evolution of the Precambrian basins and characterize possible links of Precambrian microcontinents in these regions with Gondwana and other cratons.</p><p>Distributions of U-Pb detrital zircon ages in 13 samples from ca 5 km thick flysch-like succession of the Talas and Malyi Karatau ranges (Ishim-Middle-Tianshan microcontinent) show significant similarity. They are characterized by a widespread occurrence of Neoproterozoic grains with peaks at ca 820-800 and 910–860 Ma, almost complete absence of Mesoproterozoic grains and distinct peaks at ca 2040–1990 and 2500–2465 Ma for Paleoproterozoic grains. Archean grains occur in small amount. Close similarity is supported by K-S test indicating that samples have the same or similar provenance, also implying rapid accumulation and similar depositional ages. Main peaks resemble those in the Tarim Craton, suggesting Tarim as likely provenance and pointing to the Gondwana affinity of the Ishim-Middle-Tianshan microcontinent.</p><p>In contrast, detrital zircon populations in 3 samples from the Neoproterozoic quartzites of the North Tianshan microcontinent are dominated by Mesoproterozoic grains ranging in age from ca 1500 to 1000 Ma and contain few Paleoproterozoic grains ca 1800-1650 Ma. Distributions of U-Pb zircon ages in all 3 samples are very similar and resemble those in the early Neoproterozoic quartzites from the Kokchetav area of northern Kazakhstan, recently reported by Kovach et al. (2017). Age peaks in these samples are very different from the ages of magmatic pulses in Gondwana and point that the North Tianshan microcontinent did not have connection with Gondwana.</p><p>The Ishim-Middle-Tianshan microcontinent was rifted out from the Gondwana in late Neoproterozoic and travelled to the north. Origin and travel paths of the North Tianshan microcontinent remain poorly constrained. Widespread occurrence of Mesoproterozoic zircons implies possible links with Baltica, North America or east Siberia, but more detailed study is required to define exact provenance. These two microcontinents welded together in the middle to late Ordovician during amalgamation of the Kazakhstan paleocontinent and were jointly incorporated in Eurasia during the late Paleozoic collisions of the Kazakhstan continent with Siberia, Baltica and Tarim.</p><p>The study was supported by RFBR grant 20-05-00252</p>

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