Electron microprobe observations of Pb diffusion in metamorphosed detrital monazites

Suzuki, Koji; Adachi, Mamoru; Kajizuka, Izumi

doi:10.1016/0012-821x(94)90158-9

Cited by 258 publications

(155 citation statements)

References 23 publications

Supporting

Mentioning

140

Contrasting

Order By: Relevance

“…The U/Pb zircon ages reported in this study for the Gamano and Kita-Oshima units overlap with the CHIME monazite age of 95.2 ± 3.9 Ma reported by Suzuki et al (1994) for the Gamano granodiorite. The U/Pb zircon ages also overlap with reported metamorphic ages in the Ryoke Belt (95 to 98 Ma; Shigeno and Yamaguchi, 1976;Suzuki et al, 1994).…”

Section: Yanai Districtsupporting

confidence: 80%

“…The U/Pb zircon ages also overlap with reported metamorphic ages in the Ryoke Belt (95 to 98 Ma; Shigeno and Yamaguchi, 1976;Suzuki et al, 1994). This correspondence implies that peak metamorphism in this part of the Ryoke Belt was synchronous with emplacement of the Gamano granodiorite Kita-Oshima gneiss (e.g., Suzuki et al, 1994). …”

Section: Yanai Districtsupporting

confidence: 67%

“…The Kita-Oshima granite-gneiss, cogenetic with the Gamano granite (Honma, 1974;Honma and Sakai, 1975), consists of garnet-bearing granite, granodiorite, migmatitic gneissose quartz-diorite, amphibolite blocks, metamorphosed mafic dikes, and blocks of pelitic and psammitic gneisses (Kojima and Okamura, 1968). Peak metamorphism of the Kita-Oshima granite-gneiss is dated at 98 Ma (Suzuki et al, 1994), overlapping within error with a Rb/Sr date of 95 Ma for nearby schists (Shigeno and Yamaguchi, 1976).…”

Section: Yashiro Jima Yanai Districtsupporting

confidence: 65%

“…The Precambrian component may be derived from Ju rassic metasedimentary rocks of the Tamba-Mino Ashio terrane which contain recycled older mate rials that were subsequently assimilated into the Cretaceous Ryoke magmas (Suzuki et al, 1994). Alternatively, older Precambrian materials of Hida Oki affinity, or perhaps from some other micro continent that docked with the eastern Eurasian margin (Faure et al, 1986) now present at deep crustal levels, were directly assimilated into the Ryoke magmas (Kagami et al, 1992a(Kagami et al, , 1995.…”

Section: Discussionmentioning

confidence: 99%

“…3), consists of hornblende-biotite granodiorite and tonalite with a well-developed foliation subparallel to the fo liation in the metamorphic wallrocks. Previously reported ages for the Gamano granodiorite range from 83 to 95 Ma (Miller and Shibata, 1961;Kawano and Ueda, 1966;Nureki et al, 1992;Suzuki et al, 1994). The Kita-Oshima granite-gneiss, cogenetic with the Gamano granite (Honma, 1974;Honma and Sakai, 1975), consists of garnet-bearing granite, granodiorite, migmatitic gneissose quartz-diorite, amphibolite blocks, metamorphosed mafic dikes, and blocks of pelitic and psammitic gneisses (Kojima and Okamura, 1968).…”

Section: Yashiro Jima Yanai Districtmentioning

confidence: 99%

See 4 more Smart Citations

Late Cretaceous U/Pb zircon ages and Precambrian crustal inheritance in Ryoke granitoids, Kinki and Yanai districts, Japan.

et al. 1998

View full text Add to dashboard Cite

Ryoke granitoids on Ikoma-yama and Katsuragi-yama in the Kinki District, and on Yashiro jima in the Yanai District, have Late Cretaceous zircon U/Pb isotopic crystallization ages. Older and Younger granites on Ikoma-yama were emplaced within a short time interval between 81 and 82 ± 1 Ma. Younger Ryoke granite on Katsuragi-yama, located south of Ikoma-yama, crystallized at 75 ± 3 Ma. The Gamano grano diorite and Kita-Oshima granite-gneiss on Yashiro-jima have overlapping crystallization ages of 95 to 96 ± 1 Ma. This result supports earlier ideas that the Gamano and Kita-Oshima rocks are cogenetic. An inherited component of Precambrian (1855 to 1953 Ma) radiogenic lead is present in some of the zircons from the Ryoke granitoids analyzed in this study. This result implies that older continental materials were assimilated into the granitic magmas. Possible sources include Precambrian basement or younger upper crustal rocks that contain recycled Precambrian detritus.

show abstract

Section: Yanai Districtsupporting

confidence: 80%

Section: Yanai Districtsupporting

confidence: 67%

Section: Yashiro Jima Yanai Districtsupporting

confidence: 65%

Section: Discussionmentioning

confidence: 99%

Section: Yashiro Jima Yanai Districtmentioning

confidence: 99%

See 3 more Smart Citations

Late Cretaceous U/Pb zircon ages and Precambrian crustal inheritance in Ryoke granitoids, Kinki and Yanai districts, Japan.

et al. 1998

View full text Add to dashboard Cite

show abstract

Paleoproterozoic/Mesoproterozoic tectonism in the northern fringe of the Western Dharwar Craton (India): Its relevance to Gondwanaland and Columbia supercontinent reconstructions

Rekha

Bhattacharya

2014

Tectonics

View full text Add to dashboard Cite

show abstract

∼1.6 Ga ultrahigh‐temperature granulite metamorphism in the Central Indian Tectonic Zone: insights from metamorphic reaction history, geothermobarometry and monazite chemical ages

et al. 2011

View full text Add to dashboard Cite

In this study, we present precise pressure-temperature (P-T) and age constraints of ultrahigh-temperature (UHT) metamorphism of the Bhandara-Balaghat granulite (BBG) domain at the southern margin of the Central Indian Tectonic Zone (CITZ). Supracrustal and metaigneous granulites of this domain, which lie as detached pods and lenses of various sizes within felsic gneiss-migmatite association record protracted high-T crustal anatexis events, broadly synchronous with and/or punctuated with felsic and mafic plutonism. Magnesian metagreywacke protolith of the supracrustal suite records extensive biotite melting and subsequent melt extractions at deep crustal, UHT metamorphic conditions (T ! $9008C at P$8 kbar), producing restitic mineral assemblages of garnet þ rutile, garnet þ cordierite and garnet þ aluminous orthopyroxene. The diversity of the mineral assemblages is related to the domainal-scale variation of the bulk rock composition. In situ chemical age dating of five monazite grains, which occur in the different textural settings of the garnet þ cordierite þ orthopyroxene þ rutile-bearing granulite reveals two age domains: (1) Pervasive $1.6 Ga domain, which is recorded in monazites occurring as inclusions in garnet and in the leucosome matrix is correlated with the timing of the UHT metamorphism. (2) $1.47 Ga domain reflects a fluid-mediated recrystallization event leading to dissolution and re-precipitation of older monazite. The $1.6 Ga monazite chemical ages provide robust constraints on the timing of the earliest stage of tectonothermal processes in the CITZ (defined here as the 'Central Indian Orogeny'). The significance of the $1.6 Ga hot orogenesis in interorogen correlation is discussed.

show abstract

Electron microprobe observations of Pb diffusion in metamorphosed detrital monazites

Cited by 258 publications

References 23 publications

Late Cretaceous U/Pb zircon ages and Precambrian crustal inheritance in Ryoke granitoids, Kinki and Yanai districts, Japan.

Late Cretaceous U/Pb zircon ages and Precambrian crustal inheritance in Ryoke granitoids, Kinki and Yanai districts, Japan.

Paleoproterozoic/Mesoproterozoic tectonism in the northern fringe of the Western Dharwar Craton (India): Its relevance to Gondwanaland and Columbia supercontinent reconstructions

∼1.6 Ga ultrahigh‐temperature granulite metamorphism in the Central Indian Tectonic Zone: insights from metamorphic reaction history, geothermobarometry and monazite chemical ages

Contact Info

Product

Resources

About