Uranium‐lead zircon ages from the Median Tectonic Zone, New Zealand

Kimbrough, David L.; Tulloch, A. J.; Coombs, D. S.; Landis, C. A.; Johnston, M. R.; Mattinson, James M.

doi:10.1080/00288306.1994.9514630

Cited by 161 publications

(253 citation statements)

References 77 publications

Supporting

Mentioning

240

Contrasting

Order By: Relevance

“…Earlier successful applications of this method (Kimbrough et al, 1992(Kimbrough et al, , 1994Mattinson, 1994) have demonstrated the validity of this technique for removing common Pb from zircon and thereby reducing uncertainties in 207Pb*/206Pb* dates. The leaching technique also preferentially dissolves the more soluble high-U zircon domains most strongly affected by Pb-loss.…”

Section: Methodsmentioning

confidence: 99%

“…4(a). This method of plotting the U/Pb isotopic data shows the presence of a Precambrian component as indicated by the 2o7Pb*/ 2o6Pb* data (Kimbrough et al ., 1992(Kimbrough et al ., , 1994. The 238pb*/2o6U and 207Pb*%2o6Pb* data for the three Fresh samples of Gamano granodiorite (GG 1) and Kita-Oshima gneiss (KO-1) were collected on Yashiro-jima (Fig.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 1998

Self Cite

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: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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

et al. 1998

Self Cite

View full text Add to dashboard Cite

show abstract

“…The Median Tectonic Zone is composed of disrupted Mesozoic plutonic, volcanic, and sedimentary rocks (Bradshaw 1993;Kimbrough et al 1994). Gabbroic or dioritic plutonic rocks dominate, and granitoid rocks commonly contain hornblende (Bradshaw 1993;Kimbrough etal.…”

Section: Basement Geology Of South Islandmentioning

confidence: 99%

Transpressional development of the Australia‐Pacific boundary through southern South Island, New Zealand: Constraints from Miocene‐Pliocene sediments, Waiho‐1 borehole, South Westland

Sutherland

1996

New Zealand Journal of Geology and Geophysics

View full text Add to dashboard Cite

“…Together, the Western and Eastern Provinces comprise the majority of the South Island, separated by the Median Tectonic Zone (Landis & Coombs 1967;Bishop et al 1985;Kimbrough et al 1994). Whereas the Eastern Province consists of terranes accreted to the Pacific margin of the Gondwana supercontinent, the Western Province consists of Paleozoic-Mesozoic rocks that comprised the Gondwanan margin during these collisional accretion events, which culminated in the Early Cretaceous.…”

Section: Geological Settingmentioning

confidence: 99%

Geochronological constraints on Cretaceous‐Paleocene volcanism in South Westland, New Zealand

Phillips

Cooper

Palzin

et al. 2005

New Zealand Journal of Geology and Geophysics

View full text Add to dashboard Cite

Cretaceous and Paleocene sedimentation in South Westland, New Zealand, is recorded in the Otumotu Formation, Tauperikaka Coal Measures, Whakapohai Sandstone, Arnott Basalt, Buttress Conglomerate, and Tokakoriri Formation, originally named and mapped by Nathan in 1977. Within this stratigraphic sequence, the name Buttress Conglomerate was used to describe volcanic conglomerates at Porphyry and Buttress Points that contained rounded clasts of plagioclasephyric intermediate volcanic rocks. Stratigraphically, the volcanic conglomerate at Porphyry Point forms sharp contacts with the underlying Arnott Basalt (Haumurian) and overlying Tokakoriri Formation (Teurian). The volcanic conglomerate at Buttress Point, however, is entirely fault-bounded. Clasts from each unit were collected and U-Pb zircon dated using the TIMS and ELA-ICP-MS methods. A trachyandesite clast collected at Buttress Point gives an age of 96.9 ±1.6 Ma, whereas a rhyolite clast collected at Porphyry Point gives an age of 61.4 ± 0.8 Ma. Petrological, geochemical, and stratigraphic data suggest that erosion of the clasts closely followed volcanism, and that these ages accurately reflect the depositional ages of the conglomerates. Conglomerates at Porphyry and Buttress Points have been formally renamed the Porphyry Point Member of the Tokakoriri Formation and the Buttress Point Conglomerate, respectively.

show abstract

Uranium‐lead zircon ages from the Median Tectonic Zone, New Zealand

Cited by 161 publications

References 77 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.

Transpressional development of the Australia‐Pacific boundary through southern South Island, New Zealand: Constraints from Miocene‐Pliocene sediments, Waiho‐1 borehole, South Westland

Geochronological constraints on Cretaceous‐Paleocene volcanism in South Westland, New Zealand

Contact Info

Product

Resources

About