Initiation of subduction and the generation of slab melts in western and eastern Mindanao, Philippines

Sajona, F G; Maury, René C.; Bellón, Hervé; Cotten, Joseph; Defant, Marc J.; Pubellier, Manuel

doi:10.1130/0091-7613(1993)021<1007:iosatg>2.3.co;2

Cited by 323 publications

(181 citation statements)

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“…Most known porphyry/hydrothermal Cu-Au deposits in the world occur in subduction zones or arc settings (Sajona et al, 1993;Skewes and Stern, 1994;Akira, 2002;González-Partida et al, 2003;Reich et al, 2003;Cooke et al, 2005;Richards and Kerrich, 2007;Sun et al, 2010;Tang et al, 2010). These include super-giant porphyry CuAu deposits such as the E1 Teniente, Chuquicamata and Río Blanco-Los Bronces deposits in the Andes arc related to the subduction of oceanic crust or ridges (Skewes and Stern, 1994;Oyarzun et al, 2001;Reich et al, 2003;Cooke et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Late Cretaceous (ca. 90Ma) adakitic intrusive rocks in the Kelu area, Gangdese Belt (southern Tibet): Slab melting and implications for Cu–Au mineralization

Jiang

Wang

et al. 2012

Journal of Asian Earth Sciences

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Section: Introductionmentioning

confidence: 99%

Late Cretaceous (ca. 90Ma) adakitic intrusive rocks in the Kelu area, Gangdese Belt (southern Tibet): Slab melting and implications for Cu–Au mineralization

Jiang

Wang

et al. 2012

Journal of Asian Earth Sciences

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“…2). Alternatively, adakitic magma, which is interpreted to be a partial melt of the slab with a garnet residue (e.g., Defant and Drummond, 1990;Sajona et al, 1993), is a possible magma source of the YTV, because (Sun and McDonough, 1989 Sr ratio, and is situated at the end of the compositional variation range (Fig. 4).…”

Section: Discussionmentioning

confidence: 99%

Sr-Nd-Pb isotopic and major and trace element compositions of the Yufu-Tsurumi volcanic rocks: implications for the magma genesis of the Yufu-Tsurumi volcanoes, northeast Kyushu, Japan

Sugimoto

Shibata

Yoshikawa

et al. 2006

Journal of Mineralogical and Petrological Sciences

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We have characterized the Sr Nd Pb isotopes and major and trace element compositions of 10 Quaternary volcanic rocks from the Yufu and Tsurumi volcanoes in northeast Kyushu, Japan. The enriched incompatible elements, negative Nb, and positive Pb and Sr anomalies are generally interpreted to be from island arc affinities of the lavas. However, the LREE/HREE ratio of the lavas (La/Yb = 8.5 ± 1.3) is greater than that from the island arc intermediate volcanics from northeast Japan (La/Yb = 3.8 ± 0.6), suggesting a different origin. Sr compositions fell within the range of typical adakites. Other lavas were classified as normal island arc type magmas. These results suggest that a partial melting of the subducting Philippine Sea Plate played a role in the genesis of the Yufu Tsurumi volcanic rocks. The Sr, Nd, and Pb isotopic compositions show evidence of mixing between melts, derived from oceanic basaltic crust and subducted terrigenous sediments for the adakite magma, whereas another source is required to explain the enrichment in Sr Nd isotopes and depletion in Pb isotopes of the island arc type magma. Although the island arc type magma appears to have a different source, a mixing of the adakite magma with this magma is apparent from our observations of the trace elements and isotopes.

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“…Available compositional data (from 11 Cenozoic adakite localities) show that the Na 2 O contents of all the suggested adakites are lower than 5.8% (Fig. 8) with an average of 4.4% (Table 2), except one sample from Mindanao, Philippines containing 7.36% Na 2 O (Sajona et al, 1993). The Na 2 O contents (6.59-8.46%) of the Zhantang andesites are significantly higher than those of adakites, and the K 2 O contents are also generally higher, whereas the CaO contents are clearly lower and the MgO contents are also lower at a given silica content (Fig.…”

Section: Compositional Comparison Of the Zhantang Andesites And Adakitesmentioning

confidence: 99%

“…Garnet enriched in Y and HREE is, therefore, a necessary residual phase during melting of basalt, while plagioclase enriched in Sr is minor or absent in the residue (Rapp and Watson, 1995). Partial melting of hydrated basaltic rocks at low pressures (≤8 kbar; Beard and Lofgren, 1991;Rushmer, 1991) do not produce liquids in equilibrium with garnet, whereas garnet + clinopyroxene ± (Kay,1978) Cook adakite (Stern and Killian, 1996) Cerro Pampa adakite (Kayetal., 1993) Precambrian basement of SE China [data from Yuan and Zhang (1992) (Kay, 1978;Yogodzinski et al, 1995); Cook Island, Chile (Puig et al, 1984); Baja of California, Mexico (Rogers et al, 1985;Aguillón-Robles et al, 2001); Sierra Madre, Mexico (Cameron and Cameron, 1985); Skagway, Alaska (Barker et al, 1986); El Valle and La Yeguada Volcanoes, Panama (Defant et al, 1991); Cerro Pampa, Argentina (Kay et al, 1993); Mindanao, Philippines (Sajona et al, 1993); Southwest Japan (Morris, 1995); Austral Andes (Stern and Killian, 1996); Quimsacocha, Ecuador (Beate et al, 2001). Partial melts ( ) of alkali basalt at 12-38 kbar, from Rapp et al, 1991;Rapp, 1995;Rapp and Watson, 1995.…”

Section: Compositional Comparison Of the Zhantang Andesites And Expermentioning

confidence: 99%

Extremely high-Na adakite-like magmas derived from alkali-rich basaltic underplate: The Late Cretaceous Zhantang andesites in the Huichang Basin, SE China.

Xiong

et al. 2003

Geochem. J.

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The Zhantang andesites, which erupted in the Late Cretaceous Huichang Basin of SE China interior, were associated with the Late Mesozoic lithospheric extension and basaltic underplating. They are highNa (6.59-8.46 wt% Na 2 O), high-Al trondhjemitic rocks with high Sr and Ba, low Y and HREE, and high Sr/Y and La/Yb ratios, similar to modern adakites. However, they are much higher in Na 2 O but lower in CaO than adakites. Their εNd(T) values of -2.3 to -3.8 and initial 87 Sr/ 86 Sr ratios of 0.707 to 0.708 are also significantly different from those of adakites with MORB-like isotopic compositions. These chemical and isotopic features, along with the tectonic setting, suggest that they were not produced by partial melting of subducting slab.The Zhantang adakite-like magmas may be derived from underplated basaltic lower crust, but require a compositionally peculiar basaltic protolith to account for their extremely high-Na and low-Ca feature. They are compositionally comparable to the experimentally produced partial melts of alkali-rich basalt. We therefore interpret them as the products of melting of an alkali-rich basaltic rock.

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Initiation of subduction and the generation of slab melts in western and eastern Mindanao, Philippines

Cited by 323 publications

References 0 publications

Late Cretaceous (ca. 90Ma) adakitic intrusive rocks in the Kelu area, Gangdese Belt (southern Tibet): Slab melting and implications for Cu–Au mineralization

Late Cretaceous (ca. 90Ma) adakitic intrusive rocks in the Kelu area, Gangdese Belt (southern Tibet): Slab melting and implications for Cu–Au mineralization

Sr-Nd-Pb isotopic and major and trace element compositions of the Yufu-Tsurumi volcanic rocks: implications for the magma genesis of the Yufu-Tsurumi volcanoes, northeast Kyushu, Japan

Extremely high-Na adakite-like magmas derived from alkali-rich basaltic underplate: The Late Cretaceous Zhantang andesites in the Huichang Basin, SE China.

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