Petrogenesis of Cenozoic Basalts from Vietnam: Implication for Origins of a 'Diffuse Igneous Province'

Hoàng, Nguyễn; Flower, Martin F. J.

doi:10.1093/petroj/39.3.369

Cited by 167 publications

(151 citation statements)

References 55 publications

Supporting

Mentioning

125

Contrasting

Unclassified

Order By: Relevance

“…The high magnesian olivine points to an unerupted picritic melt (~16%-18% MgO), generated by a hot mantle with Tp of 1541°C. Hoang and Flower [70] studied P-T melting conditions for Cenozoic basalts from Vietnam. They obtained a melting temperature of 1400-1470°C and pressure of <0.5-4 GPa under dry conditions and a melting temperature of 1350-1450°C and pressure of <1.5-3.5 GPa under water-undersatured conditions.…”

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

View full text Add to dashboard Cite

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.

show abstract

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

View full text Add to dashboard Cite

show abstract

“…Cenozoic continental intra-plate basalts are widespread in Southeast China, the South China Sea Basin and the Indo-China Peninsula (Zhou and Armstrong, 1982;Hoang et al, 1996;Chung et al, 1997;Zhou and Mukasa, 1997;Hoang and Flower, 1998;Ho et al, 2000Ho et al, , 2003Zou et al, 2000;Fedorov and Koloskov, 2005;Yan et al, 2008;Zou and Fan, 2010;Wang et al, 2012Wang et al, , 2013Fig. 1a), defining a potentially 'diffuse' igneous province in Southeast Asia (Hoang et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

“…1a), defining a potentially 'diffuse' igneous province in Southeast Asia (Hoang et al, 1996). These basalts show a wide spectrum of compositions from quartz tholeiites, through olivine tholeiites, to alkali olivine basalts and basanites (Hoang et al, 1996;Hoang and Flower, 1998;Ho et al, 2000Ho et al, , 2003Wang et al, 2012). They are characterized by OIB-like incompatible trace element compositions (Chung et al, 1995(Chung et al, , 1997Hoang et al, 1996;Hoang and Flower, 1998;Ho et al, 2000Ho et al, , 2003Zou and Fan, 2010;Wang et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…These basalts show a wide spectrum of compositions from quartz tholeiites, through olivine tholeiites, to alkali olivine basalts and basanites (Hoang et al, 1996;Hoang and Flower, 1998;Ho et al, 2000Ho et al, , 2003Wang et al, 2012). They are characterized by OIB-like incompatible trace element compositions (Chung et al, 1995(Chung et al, , 1997Hoang et al, 1996;Hoang and Flower, 1998;Ho et al, 2000Ho et al, , 2003Zou and Fan, 2010;Wang et al, 2012). Their isotope compositions exhibit a Dupal-like Pb isotopic signature and mixing of DMM and EM2 components in their mantle source (Tu et al, 1991;Flower et al, 1992;Chung et al, 1994Chung et al, , 1995Chung et al, , 1997Zhang et al, 1996;Zou et al, 2000;Fedorov and Koloskov, 2005;Han et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…A recent isotopic study of the Hainan basalts by Wang et al (2013) indicates they have FOZO-like Sr, Nd, and Pb isotopic compositions, and identified an ancient mantle reservoir together with young recycled materials in their mantle source. Although abundant petrological and geochemical studies have been undertaken, the origin of these basalts is still a matter of debate, with a number of different interpretations having been proposed: (1) the tholeiites form by 8-9% partial melting of spinel lherzolite at depths of <66 km, while the alkali basalts derive from slightly lower degree (1-7%) partial melting of garnet lherzolite at >79 km (Fan and Hooper, 1991); (2) the tholeiites and alkali basalts originate from lithospheric mantle and asthenospheric mantle respectively (Hoang et al, 1996;Zhou and Mukasa, 1997;Hoang and Flower, 1998;Fedorov and Koloskov, 2005); (3) they were produced by the interaction between the lithosphere and asthenosphere (Chung et al, 1994(Chung et al, , 1995Ho et al, 2000Ho et al, , 2003Han et al, 2009); or (4) that they were generated from the Hainan mantle plume (Lei et al, 2009;Zou and Fan, 2010;Wang et al, 2012Wang et al, , 2013.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Petrogenesis of Late Cenozoic basalts from North Hainan Island: Constraints from melt inclusions and their host olivines

Liu

Ren

Nichols

et al. 2015

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

Mantle transition zone discontinuities beneath the Indochina Peninsula: Implications for slab subduction and mantle upwelling

Gao

Liu

et al. 2017

Geophysical Research Letters

View full text Add to dashboard Cite

While the northward indentation of the Indian into Eurasian plates has been intensively investigated, its oblique subduction beneath the Indochina Peninsula (ICP) and the role it played on mantle structure and dynamics remain enigmatic. In this first regional‐scale receiver function study of the mantle transition zone (MTZ) discontinuities beneath the ICP and its surrounding areas, we stack ∼12,000 receiver functions recorded at 33 stations using a non–plane wave common‐conversion‐point stacking technique. Systematic spatial variations of MTZ thickness with departures between −21 and +24 km from the globally averaged value are revealed, providing independent evidence for the presence of slab segments in the MTZ beneath the central and a slab window beneath the western ICP. The results also support the existence of broad mantle upwelling adjacent to the eastern edge of the slab segments, which might be responsible for the widespread Cenozoic volcanisms and pervasively observed upper mantle low velocities in the area.

show abstract

Petrogenesis of Cenozoic Basalts from Vietnam: Implication for Origins of a 'Diffuse Igneous Province'

Cited by 167 publications

References 55 publications

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

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

Petrogenesis of Late Cenozoic basalts from North Hainan Island: Constraints from melt inclusions and their host olivines

Mantle transition zone discontinuities beneath the Indochina Peninsula: Implications for slab subduction and mantle upwelling

Contact Info

Product

Resources

About