Noble gas isotopic systematics of Fe–Ti–V oxide ore-related mafic–ultramafic layered intrusions in the Panxi area, China: The role of recycled oceanic crust in their petrogenesis

Hou, Tong; Zhang, Zhaochong; Ye, Xianren; Encarnación, John; Reichow, Marc K.

doi:10.1016/j.gca.2011.09.003

Cited by 56 publications

(17 citation statements)

References 116 publications

(184 reference statements)

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“…It is suggested that their source region is garnet pyroxenite formed by mixing of 90%-70% of peridotite matrix (FOZO) with 10%-30% recycled ancient oceanic crust component (EM1; Ren et al, 2017). The noble gas isotopes of Panzhihua, Hongge, Baima, and Taihe intrusions have obvious lower 3 He/ 4 He than typical plume-derived magmas (e.g., Hawaii basalts; Figure 7), deflecting towards the isotopic systematic of old oceanic crust field, which also support the existence of subduction-related components in their mantle source (Hou, Zhang, Ye, Encarnacion, & Reichow, 2011).…”

Section: Fe-ti Oxide-bearing Intrusions In the Panxi Regionmentioning

confidence: 80%

“…Ferropicritic magma cannot be generated by partial melting of ambient mantle peridotite at any reasonable pressure (Hou et al, 2013;Stone, Crocket, Dickin, & Fleet, 1995). Some studies proposed that the primary magmas of these oxide-bearing layered intrusion in the Panxi region originated from a Fe-rich mantle source (Hou et al, 2013;Hou, Zhang, Ye, Encarnacion, & Reichow, 2011 Figure 6). It is suggested that their source region is garnet pyroxenite formed by mixing of 90%-70% of peridotite matrix (FOZO) with 10%-30% recycled ancient oceanic crust component (EM1; Ren et al, 2017).…”

Section: Fe-ti Oxide-bearing Intrusions In the Panxi Regionmentioning

confidence: 99%

“…Grey dashed lines separate different magma types; Grey solid grey lines (P-A, P-M, A-M) are the calculated mixing lines between different sources (Kaneoka & Takaoka, 1985). Floralwhite area (P-A-C) is the isotopic ratios produced by three-component mixing (Hou et al, 2011;Kaneoka & Takaoka, 1985;Nagao & Takahashi, 1993) Roedder (1951). Representative immiscible melts from natural samples (Charlier et al, 2011;Jakobsen, Veksler, Tegner, & Brooks, 2005;Kamenetsky et al, 2013) and experiments (Dixon & Rutherford, 1979;Longhi, 1990;Veksler et al, 2007) are shown for comparison [Colour figure can be viewed at wileyonlinelibrary.com] system, and distribute subparallel to the tie line of those immiscible pairs in natural samples and experimental resultants (Figure 8b).…”

Section: The Role Of Magma Unmixing In the Fe-enrichmentmentioning

confidence: 99%

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Genesis of giant Fe‐Ti oxide deposits in the Panxi region, SW China: A review

2019

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The Panxi region, SW China, has been an important source of Fe, Ti, and V metals in the world. Several giant deposits, such as the Panzhihua, Hongge, Baima and Taihe, are hosted in ca. 260 Ma mafic-ultramafic layered intrusions in this region. These Fe-Ti oxide-bearing intrusions are unique in that they contain large proportions of massive ores in the lower and middle parts within the relatively small bodies. It is generally acknowledged that they have Fe-Ti-rich and Si-poor parental magmas that were derived from a Fe-rich mantle source containing pyroxenite/eclogite components and follow a tholeiitic differentiation trend at depth. However, it remains controversial on the mechanism of forming such large amounts of Fe-Ti oxides, with two main views of fractional crystallization and magma unmixing. Integrating previous studies, we suggest that magma unmixing has happened during the evolution of the Fe-Ti-rich magmas. Separation of immiscible Si-rich melts led to the accumulation of denser Ferich melt in the lower part of magma chamber. Large amounts of Fe-Ti oxides crystallized from the immiscible Fe-rich melt to form the major massive ores. The combined effects of fractional crystallization and magma unmixing can explain the enigmatic features of the Fe-Ti oxide-bearing layered intrusions in the Panxi region. KEYWORDS Emeishan large igneous province, Fe-Ti oxide deposit, layered intrusion, magma unmixing, Panxi region

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Section: Fe-ti Oxide-bearing Intrusions In the Panxi Regionmentioning

confidence: 80%

Section: Fe-ti Oxide-bearing Intrusions In the Panxi Regionmentioning

confidence: 99%

Section: The Role Of Magma Unmixing In the Fe-enrichmentmentioning

confidence: 99%

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Genesis of giant Fe‐Ti oxide deposits in the Panxi region, SW China: A review

2019

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“…Titanium and titanium alloys have extensive applications, such as in aerospace, national defense, transportation, medical devices, and national economic production as important strategic resources [1][2][3][4][5]. Ilmenite (TiFeO 3 ) is used as the raw material for titanium production because of the relative scarcity of rutile (TiO 2 ) [6,7].…”

Section: Introductionmentioning

confidence: 99%

Activation Mechanism of Lead Ions in Perovskite Flotation with Octyl Hydroxamic Acid Collector

2018

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The activation mechanism of lead ions (Pb 2+ ) in perovskite flotation with an octyl hydroxamic acid collector was systematically investigated using microflotation experiments, zeta-potential measurements, adsorption tests, Fourier transform infrared (FT-IR) analysis, and X-ray photoelectron spectroscopy (XPS) analysis. The results of microflotation experiments and adsorption tests indicate that the presence of Pb 2+ can promote the adsorption of octyl hydroxamic acid (OHA) on the perovskite surface and enhance the flotability of perovskite under weakly acidic conditions. The maximum recovery of 79.62% was obtained at pH 6.5 in the presence of Pb 2+ , and the maximum recovery of 57.93% was obtained at pH 5.7 without Pb 2+ . At pHs below 7, lead species are mainly present as Pb 2+ and PbOH + in the solution; besides this, the relative content of titanium increases on the perovskite surface. The adsorption of Pb 2+ and PbOH + on the perovskite surface makes the zeta-potential of perovskite shift positively, and increases the number of activated sites on the perovskite surface. FT-IR and XPS analyses confirm that OHA chemisorbs on the surface of Pb 2+ -activated perovskite and forms hydrophobic Pb-OHA complexes, which improve the flotability of perovskite.

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“…Noble gas isotopes by a conventional heat-melting gas extraction hypothesized a mixture of the noble gases in different residence sites and sources Hou et al, 2011). The accumulation of in situ radiogenic, secondary and cosmogenic components such as 4 He, 21 Ne and 40 Ar may erase the primary magmatic signatures if the intrusions are too old.…”

Section: Introductionmentioning

confidence: 99%