Paleo-position of the North China craton within the supercontinent Columbia: Constraints from new paleomagnetic results

In the last decade, the participation of the Amazonian Craton on Precambrian supercontinents has been clarified thanks to a wealth of new paleomagnetic data. Paleo to Mesoproterozoic paleomagnetic data favored that the Amazonian Craton joined the Columbia supercontinent at 1780 Ma ago, in a scenario that resembled the South AMerica and BAltica (SAMBA) configuration. Then, the mismatch of paleomagnetic poles within the Craton implied that either dextral transcurrent movements occurred between Guiana and Brazil-Central Shield after 1400 Ma or internal rotation movements of the Amazonia-West African block took place between 1780 and 1400 Ma. The presently available late-Mesoproterozoic paleomagnetic data are compatible with two different scenarios for the Amazonian Craton in the Rodinia supercontinent. The first one involves an oblique collision of the Amazonian Craton with Laurentia at 1200 Ma ago, starting at the present-day Texas location, followed by transcurrent movements, until the final collision of the Amazonian Craton with Baltica at ca. 1000 Ma. The second one requires drifting of the Amazonian Craton and Baltica away from the other components of Columbia after 1260 Ma, followed by clockwise rotation and collision of these blocks with Laurentia along Grenvillian Belt at 1000 Ma. Finally, although the time Amazonian Craton collided with the Central African block is yet very disputed, the few late Neoproterozoic/Cambrian paleomagnetic poles available for the Amazonian Craton, Laurentia and other West Gondwana blocks suggest that the Clymene Ocean separating these blocks has only closed at late Ediacaran to Cambrian times, after the Amazonian Craton rifted apart from Laurentia at ca. 570 Ma.

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“…Zhang et al 2012, Xu et al 2014, Pehrsson et al 2016 Xu et al (2014), and Pehrsson et al (2016), as seen in Figs. 6a to 6d, respectively.…”

Section: Columbia Supercontinentmentioning

confidence: 90%

Paleomagnetism of the Amazonian Craton and its role in paleocontinents

et al. 2016

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“…Based on paleomagnetic data, NCC and Laurentia shared the similar APWPs between 1200-700 Ma, indicating that the two cratons were adjacent to each other in Rodinia, and the separation of them commenced at 650-615 Ma (Li et al, 1996;Zhang et al, 2006). More paleomagnetic data obtained in recent years also supported the proximities among NCC, Laurentia, Siberia and Baltic in the early Mesoproterozoic to Neoproterozoic, and the separation of NCC from Columbia might begin at ~1400 Ma (Xu et al, 2014;Fu et al, 2015).…”

Section: Non-ncc Provenancementioning

confidence: 70%

Detrital Zircon U–Pb Geochronology and Provenance of Bayan Obo Group, Northern Margin of North China Craton: New Implications for the Position of NCC in Rodinia

Liu

et al. 2019

Acta Geologica Sinica (Eng)

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The paleoposition of North China Craton in Rodinia has long been in controversial. This paper mainly focuses on the U–Pb geochronological studies of detrital zircons obtained from Bayan Obo Group exposed in the Shangdu area, Inner Mongolia, aiming to provide more information for interprating this problem. Based on the acquired data, this paper comes to the following conclusions. Firstly, the depositional age of Bayan Obo Group might be from Meso– to Neoproterozoic according to the zircons U–Pb dating results. The lower succession of this group, namely Dulahala and Jianshan formations deposited between 1800 and 1650 Ma. The Halahuogete and Bilute formations deposited between 1500 and 1350 Ma. For Baiyinbaolage and Hujiertu formations, their depositional age was 1250–900 Ma. Secondly, for the provenance of Bayan Obo Group, this paper believes detrital zircons with age of 2.51–2.71 Ga and 2.00–2.48 Ga were from Guyang, Xi Ulanbulang and Zhuozi area; the Khondalite Belt provided detrital zircons with age of 1.95–1.80 Ga; zircons with age of 1.60–1.75 Ga might come from granitic rocks in Miyun Area. The magmatism after 1.60 Ga was rarely recorded in the NCC, therefore those zircons with ages younger than 1.60 Ga might come from outside of NCC. The magmatism with the same age existed in Baltic, Amazonia and Laurentia. Based on previous paleomagnetic researches, this paper proposes that NCC might receive detritus from Baltic during 1560–1350 Ma and had affinity with Laurentia and Amazonia at ∼0.9 Ga in Rodinia. Baltic, Amazonia and Laurentia might be potential provenances for non–NCC detritus in Bayan Obo Group.

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“… 17 and 39 , 10 from ref. 46 , and 79 new basalts, dikes, granites, and granitoids (see SI Dataset Descriptions ). All specimens were thermally stabilized before the experiments, to ensure no alteration occurred, and given a full laboratory TRM from 700 °C.…”

Section: Methodsmentioning

confidence: 99%

Bulk magnetic domain stability controls paleointensity fidelity

Paterson

Muxworthy

Yamamoto

et al. 2017

Proc. Natl. Acad. Sci. U.S.A.

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SignificanceThe strength of the ancient geomagnetic field (paleointensity) is a key tool to observe the evolution of early Earth’s geodynamo, which provided an essential protective barrier for the emergence of life. However, paleointensity data are fraught with difficulties that make understanding the evolution of our planet more challenging. We demonstrate a long-sought-after quantitative relationship between fundamental rock magnetic properties and the fidelity of paleointensity records. This relationship can be used to reject low-fidelity paleointensity records and help resolve controversy that surrounds key questions about the evolution of our planet, such as when did the geodynamo begin, when did the inner core solidify, or how early life may have interacted with the magnetic field.

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Paleo-position of the North China craton within the supercontinent Columbia: Constraints from new paleomagnetic results

Cited by 63 publications

References 96 publications

Paleomagnetism of the Amazonian Craton and its role in paleocontinents

Paleomagnetism of the Amazonian Craton and its role in paleocontinents

Detrital Zircon U–Pb Geochronology and Provenance of Bayan Obo Group, Northern Margin of North China Craton: New Implications for the Position of NCC in Rodinia

Bulk magnetic domain stability controls paleointensity fidelity

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