Preliminary Phanerozoic polar wander paths for the North and South China blocks

Lin, Jia; Fuller, M.; Zhang, Wenyou

doi:10.1038/313444a0

Cited by 325 publications

(112 citation statements)

References 18 publications

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“…It has been suggested that the presence of the Dupal anomaly in the northern hemisphere is due to the location of South China in the Gondwana supercontinent in the southern hemisphere [81]. Paleomagnetic studies show that in the late Paleozoic, Southeast China may have migrated northward [82]; the Dupal anomaly in basalts from the SCS and its surroundings may therefore have inherited values from the Gondwana continent. Such an interpretation involves the coupling of the supercontinent with the convective mantle, Figure 8 Ta/Hf vs. Th/Hf for the post-spreading volcanic rocks.…”

Section: Hainan Mantle Plume and Its Link With The Opening Of The Soumentioning

confidence: 99%

“…However, there is no evidence for such a coupling because the formation and rifting of the super-continent generally take place on a lithospheric scale. For instance, the North China Block was once a part of the Laurencia continent in the northern hemisphere [82,83], but the Cenozoic basalts from this region also display relatively higher 208 Pb/ 204 Pb and 207 Pb/ 204 Pb at given 206 Pb/ 204 Pb, delineating a Dupal anomaly.…”

Section: Hainan Mantle Plume and Its Link With The Opening Of The Soumentioning

confidence: 99%

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Opening and evolution of the South China Sea constrained by studies on volcanic rocks: Preliminary results and a research design

et al. 2011

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The South China Sea (SCS) is characterized by abundant seamounts, which provide important information about the evolution of the SCS and related deep processes. Cenozoic volcanism in the SCS and its surroundings comprises three stages relative to the spreading of the SCS: pre-spreading (>32 Ma), syn-spreading (32-16 Ma), and post-spreading (<16 Ma). The pre-spreading magmatism predominantly occurs on the northern margin of the SCS and in South China coastal areas and shows a bi-modal affinity. The syn-spreading magmatic activity was very limited on the periphery of the SCS, but may be concentrated in the SCS. However, seafloor samples of this stage are not available yet because of overlying thick sedimentary deposits. Post-spreading magmatism is widespread in the central and southwest sub-basins of the SCS, Hainan Island, Leizhou Peninsula, Thailand, and Vietnam. These are mainly alkali basalts with subordinate tholeiites, and display OIB-type geochemical characteristics. The Dupal isotope anomaly and presence of high-magnesian olivine phenocrysts suggests their possible derivation from the Hainan mantle plume. The temporal and spatial distribution of Cenozoic volcanism in the SCS and its surroundings may be accounted for either by plate stress re-organization before and after SCS spreading, or by ridge suction of plume flow during opening of the SCS. If the latter is the case, the volcanic rocks within the SCS basin may not be typical mid-ocean ridge basalts (MORB). It remains puzzling, however, that the transition between the South China continental margin and the SCS basin does not have features typical of a volcanic rifted margin. Clearly, the relationship between mantle plume and SCS opening needs further evaluation. A better understanding of the link between deep processes and opening of the SCS not only requires enhanced studies on igneous petrogenesis, but also is heavily dependent on systematic sampling of seafloor rocks.

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Section: Hainan Mantle Plume and Its Link With The Opening Of The Soumentioning

confidence: 99%

Section: Hainan Mantle Plume and Its Link With The Opening Of The Soumentioning

confidence: 99%

Opening and evolution of the South China Sea constrained by studies on volcanic rocks: Preliminary results and a research design

et al. 2011

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“…[1993], Lin [1984], and Zhou et al [1988], but on a smaller set of samples. The ChRM directions pass both fold tests [McElhinny et al, 1981], and/or the reversal test [Huang et al, 1986;Zhou et al, 1988] or conglomerate test [Huang and Opdyke, 1995], all indicating a primary thermal remanent magnetization.…”

Section: Magnetic Polarity Sequence and Regional Correlationmentioning

confidence: 99%

Magnetostratigraphic constraints on two‐stage eruptions of the Emeishan continental flood basalts

Zheng

Yang

Tong³

et al. 2010

Geochem Geophys Geosyst

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[1] Temporal and spatial variations of high and low contents of Ti basalts in the Permian Emeishan large igneous province (ELIP) of southwest China and Vietnam are crucial for modeling of continental basalt formation and the nature of mantle-lithosphere interaction. A combined geochemical and magnetostratigraphic study was carried out at Yanyuan in the inner zone of the ELIP. Geochemical results indicate that the basalts are low-Ti (LT) basalts (Ti/Y ∼ 484.2-511.4) in the Luomapu section and high-Ti (HT) basalts (Ti/Y ∼ 558.2-658.9) in the Gongmushan section. Systematic paleomagnetic sampling and stepwise thermal demagnetization demonstrate that the higher temperature component shows two distinct characteristic remanent magnetizations with northeasterly upward and SWW downward directions. These results indicate a simple magnetostratigraphic normal and reversed polarity pattern from the lower and upper parts of the section, respectively. By comparing with available magnetostratigraphic and paleomagnetic data carried out in the ELIP, these results imply that the eruption of the Emeishan basalts can be divided into early (normal polarity subchron) and late (reversal subchron) stages. The early stage included LT basalts in the inner zone and most of the HT basalts in the intermediate and outer zones, and the late stage contained a part of LT and HT basalts in the upper parts of the sections in the inner zone and a few in the intermediate zone of the ELIP. Correlating with available Middle-Late Permian magnetostratigraphy and the Permian magnetic time scale, the new magnetic polarity sequence result suggests that the ELIP formed over a very short time interval (<1 Myr).

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“…A comparision between South Korea and the SCB shows that while the Late Jurassic and younger poles are only slightly different as KIM and VAN DER VOO (1990) KIM and KIM (1991). Those for China are from LIN et al (1985). The error bars of paleolatitude and declination are represented by dp and dm, respectively, the semi-axes of the elliptical error arround the pole at 95% probability.…”

Section: Geology and Samplingmentioning

confidence: 99%

“…Carboniferous pole obtained by SHIBUYA et al (1988) is indicated as Cm (Shi). All poles for the South China Block are from LIN et al (1985) except for the Late Permian (ZHAO and COE,1987). J, Jurassic; Tr, triassic; P, Permian; C, Carboniferous; u, Late; m, Middle; 1, Early.…”

Section: Geology and Samplingmentioning

confidence: 99%