40Ar/39Ar and K-Ar geochronological age constraints for the inception and early evolution of the Izu-Bonin-Mariana Arc system

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doi: 10.1111/j.1440-1738.1998.00211.x
Author(s): Cosca, Michael A.; Arculus, Richard J.; Pearce, Julian A.; Mitchell, John G.
Author Affiliation(s): Primary:
Universite de Lausanne, Institut de Mineralogie et Petrographie, Lausanne, Switzerland
Other:
University of Texas at Dallas, United States
Australian National University, Australia
University of Durham, United Kingdom
University of Newcastle-upon-Tyne, United Kingdom
Volume Title: Izu-Bonin-Mariana Arc system
Volume Author(s): Stern, Robert J., prefacer; Arima, Makoto
Source: Izu-Bonin-Mariana Arc system, prefaced by Robert J. Stern and Makoto Arima. Island Arc, 7(3), p.579-595. Publisher: Wiley Blackwell on behalf of Geological Society of Japan, Tsukuba, Japan. ISSN: 1038-4871
Note: In English. Australian National University, Department of Geology, GEMOC Publ. No. 130. 47 refs.; illus., incl. 3 tables, sketch map
Summary: K-Ar and 40Ar/39Ar dates are presented for locations in the Izu-Bonin-Mariana (IBM) forearc (Ocean Drilling Program (ODP) sites 786 & 782, Chichijima, Deep Sea Drilling Program (DSDP) sites 458 & 459, Saipan), and Palau on the remnant arc of the Kyushu-Palau Ridge. For a number of these locations, the 40Ar/39Ar plateau and 36Ar/40Ar versus 39Ar/40Ar isochrons give older ages than the K-Ar results. The most important results are: (i) at site 786, initial construction of the proto-IBM (now forearc) basement occurred at least by ca 47-45 Ma, consistent with the age of the immediately overlying sediments (middle Eocene nannofossil Zone CP13c); the younger pulse of construction dated at ca 35 Ma by K-Ar could not be confirmed by 40Ar/39Ar analysis; (ii) 40Ar/39Ar ages for the initial construction of the Mariana portion of the IBM system are as old as those of the Izu-Bonin portion, for example at site 458, initial construction commenced at least by ca 49 Ma and at ca 47 Ma at Saipan (Sankakayuma Formation); and (iii) a combination of K-Ar and 40Ar/39Ar ages indicate continued boninite magmatism in the Izu-Bonin forearc (and remnant arc at Palau) until ca 35 Ma. Subduction inception including boninite series rocks along most of the exposed length of the IBM system, clearly preceded by some 5 million years the Middle Eocene (ca 43.5 Ma) change in Pacific plate motion. Boninitic series magmatism persisted at locations now exposed in the forearc for ∼15 million years after arc inception concurrently with low-K tholeiitic series eruptions from a subaerial arc system, established at ≥40 Ma, on the Kyushu-Palau Ridge. For the Mariana portion of the IBM system, reconstruction of the proto-arc places this activity adjacent to the concurrent but orthogonally spreading Central Basin Ridge of the West Philippine Basin. It is possible that a combination of subduction of a young North New Guinea Plate beneath newly created back-arc basin crust may account for some of the features of the Mariana system. It is clear, however, that the understanding of the processes of subduction initiation and early IBM arc development is incomplete.
Year of Publication: 1998
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
ODP Ocean Drilling Program
Key Words: 03 Geochronology; 18 Geophysics, Solid-Earth; Absolute age; Aimeliik Formation; Algae; Alutom Formation; Andesites; Ar/Ar; Arakabesan Formation; Babelduap Formation; Basins; Biostratigraphy; Boninite; Caroline Islands; Cenozoic; Chichijima; DSDP Site 458; DSDP Site 459; Dates; Deep Sea Drilling Project; Eocene; Facpi Formation; Fore-arc basins; Geochronology; Guam; Hagman Formation; Hypabyssal rocks; IPOD; Igneous rocks; Island arcs; Izu-Bonin Arc; Izu-Bonin-Mariana Arc; K/Ar; Kyushu-Palau Ridge; Leg 125; Leg 60; Lower Oligocene; Magmatism; Mariana Islands; Microfossils; Micronesia; Middle Eocene; Nannofossils; North Pacific; Northern Mariana Islands; Northwest Pacific; ODP Site 782; ODP Site 786; Ocean Drilling Program; Oceania; Oligocene; Pacific Ocean; Palau; Paleogene; Philippine Sea; Plantae; Plate tectonics; Relative age; Saipan; Sankakayuma Formation; Sea-floor spreading; Spreading centers; Subduction; Tertiary; Volcanic rocks; West Pacific; West Philippine Basin
Coordinates: N060000 N320000 E1470000 E1340000
Record ID: 2012050273
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute.
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100 1 |a Cosca, Michael A.  |u Universite de Lausanne, Institut de Mineralogie et Petrographie, Lausanne 
245 1 0 |a >40`Ar/>39`Ar and K-Ar geochronological age constraints for the inception and early evolution of the Izu-Bonin-Mariana Arc system 
300 |a p. 579-595 
500 |a In English. Australian National University, Department of Geology, GEMOC Publ. No. 130. 47 refs. 
500 |a Research program: DSDP Deep Sea Drilling Project 
500 |a Research program: IPOD International Phase of Ocean Drilling 
500 |a Research program: ODP Ocean Drilling Program 
500 |a Affiliation: Universite de Lausanne, Institut de Mineralogie et Petrographie; Lausanne; CHE; Switzerland 
500 |a Affiliation: University of Texas at Dallas; ; USA; United States 
500 |a Affiliation: Australian National University; ; AUS; Australia 
500 |a Affiliation: University of Durham; ; GBR; United Kingdom 
500 |a Affiliation: University of Newcastle-upon-Tyne; ; GBR; United Kingdom 
500 |a Source note: Izu-Bonin-Mariana Arc system, prefaced by Robert J. Stern and Makoto Arima. Island Arc, 7(3), p.579-595. Publisher: Wiley Blackwell on behalf of Geological Society of Japan, Tsukuba, Japan. ISSN: 1038-4871 
500 |a Publication type: journal article 
504 |b 47 refs. 
510 3 |a GeoRef, Copyright 2019 American Geosciences Institute. 
520 |a K-Ar and >40`Ar/>39`Ar dates are presented for locations in the Izu-Bonin-Mariana (IBM) forearc (Ocean Drilling Program (ODP) sites 786 & 782, Chichijima, Deep Sea Drilling Program (DSDP) sites 458 & 459, Saipan), and Palau on the remnant arc of the Kyushu-Palau Ridge. For a number of these locations, the >40`Ar/>39`Ar plateau and >36`Ar/>40`Ar versus >39`Ar/>40`Ar isochrons give older ages than the K-Ar results. The most important results are: (i) at site 786, initial construction of the proto-IBM (now forearc) basement occurred at least by ca 47-45 Ma, consistent with the age of the immediately overlying sediments (middle Eocene nannofossil Zone CP13c); the younger pulse of construction dated at ca 35 Ma by K-Ar could not be confirmed by >40`Ar/>39`Ar analysis; (ii) >40`Ar/>39`Ar ages for the initial construction of the Mariana portion of the IBM system are as old as those of the Izu-Bonin portion, for example at site 458, initial construction commenced at least by ca 49 Ma and at ca 47 Ma at Saipan (Sankakayuma Formation); and (iii) a combination of K-Ar and >40`Ar/>39`Ar ages indicate continued boninite magmatism in the Izu-Bonin forearc (and remnant arc at Palau) until ca 35 Ma. Subduction inception including boninite series rocks along most of the exposed length of the IBM system, clearly preceded by some 5 million years the Middle Eocene (ca 43.5 Ma) change in Pacific plate motion. Boninitic series magmatism persisted at locations now exposed in the forearc for ∼15 million years after arc inception concurrently with low-K tholeiitic series eruptions from a subaerial arc system, established at ≥40 Ma, on the Kyushu-Palau Ridge. For the Mariana portion of the IBM system, reconstruction of the proto-arc places this activity adjacent to the concurrent but orthogonally spreading Central Basin Ridge of the West Philippine Basin. It is possible that a combination of subduction of a young North New Guinea Plate beneath newly created back-arc basin crust may account for some of the features of the Mariana system. It is clear, however, that the understanding of the processes of subduction initiation and early IBM arc development is incomplete. 
650 7 |a Absolute age  |2 georeft 
650 7 |a Algae  |2 georeft 
650 7 |a Andesites  |2 georeft 
650 7 |a Ar/Ar  |2 georeft 
650 7 |a Basins  |2 georeft 
650 7 |a Biostratigraphy  |2 georeft 
650 7 |a Boninite  |2 georeft 
650 7 |a Cenozoic  |2 georeft 
650 7 |a Dates  |2 georeft 
650 7 |a Deep Sea Drilling Project  |2 georeft 
650 7 |a Eocene  |2 georeft 
650 7 |a Fore-arc basins  |2 georeft 
650 7 |a Geochronology  |2 georeft 
650 7 |a Hypabyssal rocks  |2 georeft 
650 7 |a Igneous rocks  |2 georeft 
650 7 |a Island arcs  |2 georeft 
650 7 |a K/Ar  |2 georeft 
650 7 |a Lower Oligocene  |2 georeft 
650 7 |a Magmatism  |2 georeft 
650 7 |a Microfossils  |2 georeft 
650 7 |a Middle Eocene  |2 georeft 
650 7 |a Nannofossils  |2 georeft 
650 7 |a Ocean Drilling Program  |2 georeft 
650 7 |a Oligocene  |2 georeft 
650 7 |a Paleogene  |2 georeft 
650 7 |a Plantae  |2 georeft 
650 7 |a Plate tectonics  |2 georeft 
650 7 |a Relative age  |2 georeft 
650 7 |a Sea-floor spreading  |2 georeft 
650 7 |a Spreading centers  |2 georeft 
650 7 |a Subduction  |2 georeft 
650 7 |a Tertiary  |2 georeft 
650 7 |a Volcanic rocks  |2 georeft 
651 7 |a Caroline Islands  |2 georeft 
651 7 |a DSDP Site 458  |2 georeft 
651 7 |a DSDP Site 459  |2 georeft 
651 7 |a Guam  |2 georeft 
651 7 |a IPOD  |2 georeft 
651 7 |a Izu-Bonin Arc  |2 georeft 
651 7 |a Izu-Bonin-Mariana Arc  |2 georeft 
651 7 |a Kyushu-Palau Ridge  |2 georeft 
651 7 |a Leg 125  |2 georeft 
651 7 |a Leg 60  |2 georeft 
651 7 |a Mariana Islands  |2 georeft 
651 7 |a Micronesia  |2 georeft 
651 7 |a North Pacific  |2 georeft 
651 7 |a Northern Mariana Islands  |2 georeft 
651 7 |a Northwest Pacific  |2 georeft 
651 7 |a Oceania  |2 georeft 
651 7 |a ODP Site 782  |2 georeft 
651 7 |a ODP Site 786  |2 georeft 
651 7 |a Pacific Ocean  |2 georeft 
651 7 |a Palau  |2 georeft 
651 7 |a Philippine Sea  |2 georeft 
651 7 |a Saipan  |2 georeft 
651 7 |a West Pacific  |2 georeft 
651 7 |a West Philippine Basin  |2 georeft 
653 |a Aimeliik Formation 
653 |a Alutom Formation 
653 |a Arakabesan Formation 
653 |a Babelduap Formation 
653 |a Chichijima 
653 |a Facpi Formation 
653 |a Hagman Formation 
653 |a Sankakayuma Formation 
700 1 |a Arculus, Richard J., 
700 1 |a Pearce, Julian A., 
700 1 |a Mitchell, John G., 
700 1 |a Arima, Makoto,  |e monographic prefacer 
773 0 |a Stern, Robert J., prefacer  |t Izu-Bonin-Mariana Arc system  |d Tsukuba : Wiley Blackwell on behalf of Geological Society of Japan, Sep. 1998  |k Island Arc  |x 1038-4871  |n Izu-Bonin-Mariana Arc system, prefaced by Robert J. Stern and Makoto Arima. Island Arc, 7(3), p.579-595. Publisher: Wiley Blackwell on behalf of Geological Society of Japan, Tsukuba, Japan. ISSN: 1038-4871 Publication type: journal article  |g Vol. 7, no. 3  |h illus., incl. 3 tables, sketch map 
856 |u urn:doi: 10.1111/j.1440-1738.1998.00211.x