The oceanic substratum of Northern Luzon: Evidence from xenoliths within Monglo adakite (the Philippines)

Betchaida D. Payot; Sebastien Jego; Rene C. Maury; Mireille Polve; Michel Gregoire; Georges Ceuleneer; Rodolfo A. Tamayo; Graciano P. Yumul; Herve Bellon; Joseph Cotten

doi:10.1111/j.1440-1738.2007.00574.x

The oceanic substratum of Northern Luzon: Evidence from xenoliths within Monglo adakite (the Philippines)

Betchaida D. Payot^*, Sebastien Jego, Rene C. Maury, Mireille Polve, Michel Gregoire, Georges Ceuleneer, Rodolfo A. Tamayo, Graciano P. Yumul, Herve Bellon, Joseph Cotten

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

A 8.65 Ma adakitic intrusive sheet exposed near Monglo village in the Baguio District of Northern Luzon contains a suite of ultramafic and mafic xenoliths including in order of abundance: spinel dunites showing typical mantle-related textures, mineral and bulk rock compositions, and serpentinites derived from them; amphibole-rich gabbros displaying incompatible element patterns similar to those of flat or moderately enriched back-arc basin basalt magmas; and amphibolites derived from metabasalts and/or metagabbros of identical affinity. A single quartz diorite xenolith carrying a similar subduction-related geochemical signature has also been sampled. One amphibolite xenolith provided a whole-rock K-Ar age of 115.6 Ma (Barremian). We attribute the origin of this suite to the sampling by ascending adakitic magmas of a Lower Cretaceous ophiolitic complex located at a depth within the 30-35 km thick Luzon crust. It could represent an equivalent of the Isabela-Aurora and Pugo-Lepanto ophiolitic massifs exposed in Northern Luzon.

Original language	English
Pages (from-to)	276-290
Number of pages	15
Journal	Island Arc
Volume	16
Issue number	2
DOIs	https://doi.org/10.1111/j.1440-1738.2007.00574.x
Publication status	Published - Jun 2007
Externally published	Yes

Keywords

Adakite
Dunite
Gabbro
Luzon crust
Ophiolite
The Philippines
Xenolith

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10.1111/j.1440-1738.2007.00574.x

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title = "The oceanic substratum of Northern Luzon: Evidence from xenoliths within Monglo adakite (the Philippines)",

abstract = "A 8.65 Ma adakitic intrusive sheet exposed near Monglo village in the Baguio District of Northern Luzon contains a suite of ultramafic and mafic xenoliths including in order of abundance: spinel dunites showing typical mantle-related textures, mineral and bulk rock compositions, and serpentinites derived from them; amphibole-rich gabbros displaying incompatible element patterns similar to those of flat or moderately enriched back-arc basin basalt magmas; and amphibolites derived from metabasalts and/or metagabbros of identical affinity. A single quartz diorite xenolith carrying a similar subduction-related geochemical signature has also been sampled. One amphibolite xenolith provided a whole-rock K-Ar age of 115.6 Ma (Barremian). We attribute the origin of this suite to the sampling by ascending adakitic magmas of a Lower Cretaceous ophiolitic complex located at a depth within the 30-35 km thick Luzon crust. It could represent an equivalent of the Isabela-Aurora and Pugo-Lepanto ophiolitic massifs exposed in Northern Luzon.",

keywords = "Adakite, Dunite, Gabbro, Luzon crust, Ophiolite, The Philippines, Xenolith",

author = "Payot, \{Betchaida D.\} and Sebastien Jego and Maury, \{Rene C.\} and Mireille Polve and Michel Gregoire and Georges Ceuleneer and Tamayo, \{Rodolfo A.\} and Yumul, \{Graciano P.\} and Herve Bellon and Joseph Cotten",

year = "2007",

month = jun,

doi = "10.1111/j.1440-1738.2007.00574.x",

language = "English",

volume = "16",

pages = "276--290",

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TY - JOUR

T1 - The oceanic substratum of Northern Luzon

T2 - Evidence from xenoliths within Monglo adakite (the Philippines)

AU - Payot, Betchaida D.

AU - Jego, Sebastien

AU - Maury, Rene C.

AU - Polve, Mireille

AU - Gregoire, Michel

AU - Ceuleneer, Georges

AU - Tamayo, Rodolfo A.

AU - Yumul, Graciano P.

AU - Bellon, Herve

AU - Cotten, Joseph

PY - 2007/6

Y1 - 2007/6

N2 - A 8.65 Ma adakitic intrusive sheet exposed near Monglo village in the Baguio District of Northern Luzon contains a suite of ultramafic and mafic xenoliths including in order of abundance: spinel dunites showing typical mantle-related textures, mineral and bulk rock compositions, and serpentinites derived from them; amphibole-rich gabbros displaying incompatible element patterns similar to those of flat or moderately enriched back-arc basin basalt magmas; and amphibolites derived from metabasalts and/or metagabbros of identical affinity. A single quartz diorite xenolith carrying a similar subduction-related geochemical signature has also been sampled. One amphibolite xenolith provided a whole-rock K-Ar age of 115.6 Ma (Barremian). We attribute the origin of this suite to the sampling by ascending adakitic magmas of a Lower Cretaceous ophiolitic complex located at a depth within the 30-35 km thick Luzon crust. It could represent an equivalent of the Isabela-Aurora and Pugo-Lepanto ophiolitic massifs exposed in Northern Luzon.

AB - A 8.65 Ma adakitic intrusive sheet exposed near Monglo village in the Baguio District of Northern Luzon contains a suite of ultramafic and mafic xenoliths including in order of abundance: spinel dunites showing typical mantle-related textures, mineral and bulk rock compositions, and serpentinites derived from them; amphibole-rich gabbros displaying incompatible element patterns similar to those of flat or moderately enriched back-arc basin basalt magmas; and amphibolites derived from metabasalts and/or metagabbros of identical affinity. A single quartz diorite xenolith carrying a similar subduction-related geochemical signature has also been sampled. One amphibolite xenolith provided a whole-rock K-Ar age of 115.6 Ma (Barremian). We attribute the origin of this suite to the sampling by ascending adakitic magmas of a Lower Cretaceous ophiolitic complex located at a depth within the 30-35 km thick Luzon crust. It could represent an equivalent of the Isabela-Aurora and Pugo-Lepanto ophiolitic massifs exposed in Northern Luzon.

KW - Adakite

KW - Dunite

KW - Gabbro

KW - Luzon crust

KW - Ophiolite

KW - The Philippines

KW - Xenolith

UR - https://www.scopus.com/pages/publications/34249777240

U2 - 10.1111/j.1440-1738.2007.00574.x

DO - 10.1111/j.1440-1738.2007.00574.x

M3 - Article

AN - SCOPUS:34249777240

SN - 1038-4871

VL - 16

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EP - 290

JO - Island Arc

JF - Island Arc

IS - 2

ER -

The oceanic substratum of Northern Luzon: Evidence from xenoliths within Monglo adakite (the Philippines)

Abstract

Keywords

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