Search Results - Southern U.S.

U–Pb zircon geochronology of the eastern part of the Southern Ethiopian Shield by Stern, R., Ali, K., Abdelsalam, M., Wilde, Simon, Zhou, Q.

“…U–Pb zircon SHRIMP and LA-ICP-MS dating of 8 igneous and metamorphic intermediate and felsic bodies in the eastern SES yield Neoproterozoic crystallization ages: 847 ± 11, 855 ± 14, 732 ± 5, 665 ± 8, 657 ±6, 560 ± 8, and 548 ± 8 Ma. …”
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U-Pb SHRIMP zircon geochronology and T-t-d history of the Kampa Dome, southern Tibet by Quigley, M., Liangjun, Y., Gregory, Courtney, Corvino, A., Sandiford, M., Wilson, C., Xiaohan, L.

“…Structural, petrographic and geochronologic studies of the Kampa Dome provide insights into the tectonothermal evolution of orogenic crust exposed in the North Himalayan gneiss domes of southern Tibet. U–Pb ion microprobe dating of zircons from granite gneiss exposed at the deepest levels within the dome yields concordia 206Pb/238U age populations of 506 ± 3 Ma and 527 ± 6 Ma, with no evidence of new zircon growth during Himalayan orogenesis. …”
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SHRIMP U-Pb age constraints on magmatism and high-grade metamorphism in the Salem Block, southern India by Clark, Chris, Collins, Alan, Timms, Nicholas Eric, Kinny, Peter, Chetty, T., Santosh, M.

“…In this paper, we present Sensitive High Resolution Ion Microprobe (SHRIMP) U and Pb isotope analyses of zircon from a charnockite and a charnockite-hosted leucosome in order to determine the age of magmatism and anatexis related to high-grade metamorphism immediately to the north of the Palghat Cauvery Shear System (PCSS), a proposed Neoproterozoic terrane boundary within Southern India. …”
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Detrital Zircon U-Pb Age Data, and Precambrian Provenance of the Paleozoic Guaritas Formation, Southern Brazilian Shield by Hartmann, L., Santos, J., McNaughton, Neal

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Detrital zircons in basement metasedimentary protoliths unveil the origins of southern India by Plavsa, Diana, Collins, A., Payne, J., Foden, J., Clark, Christopher, Santosh, M.

“…Coupled U-Pb and Hf isotopic analysis of detrital zircons from metasedimentary rocks of the Southern Granulite terrane (India) provides provenance information that helps unravel their paleotectonic position before Gondwana amalgamated. …”
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Tectonic evolution of the southern margin of the Amazonian craton in the late Mesoproterozoic based on field relationships and zircon U-Pb geochronology by Rizzotto, G., Hartmann, L., Santos, J., McNaughton, Neal

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SHRIMP U–Pb zircon geochronology of Neoproterozoic crustal granitoids (Southern Brazil): A case for discrimination of emplacement and inherited ages by da Silva, L., McNaughton, Neal, Fletcher, Ian

“…SHRIMP U–Pb zircon studies on two post-collisional granitic plutons and reassessment of the data previously reported for two anatectic gneissic granites are used to assess the late Neoproterozoic history of the Florianόpolis Batholith, southern Brazil. …”
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Dating deposition and low-grade metamorphism by in situ U-Pb geochronology of titanite in the Paleoproterozoic Timeball Hill Formation, southern Africa by Rasmussen, Birger, Fletcher, Ian, Muhling, J.

“…The brown titanite is interpreted to be magmatic and to provide a reliable estimate for the age of deposition. In situ U--Pb dating of matrix-filling titanite cement from the same stratigraphic interval yields an age of 2145 ± 12 Ma, which corresponds with previous estimates for a low-grade tectonothermal event in southern Africa. …”
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Hot orogens and supercontinent amalgamation: A Gondwanan example from southern India by Clark, Christopher, Healy, D., Johnson, Tim, Collins, A., Taylor, Richard, Santosh, M., Timms, Nicholas Eric

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Age and origin of middle Neoproterozoic mafic magmatism in southern Yangtze Block and relevance to the break-up of Rodinia by Zhou, J., Li, X., Ge, W., Li, Zheng-Xiang

“…SHRIMP U–Pb zircon age, geochemical and Sm–Nd isotopic data are reported for mid-Neoproterozoic volcanic rocks and mafic intrusions in northern Guangxi (Guibei) and western Hunan (Xiangxi) Provinces along the southern margin of the Yangtze Block. …”
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Untying the Kibaran knot: a reassessment of Mesoproterozoic correlations in southern Africa based on SHRIMP U-Pb data from the Irumide belt by De Waele, Bert, Wingate, Michael, Fitzsimons, Ian, Mapani, B.

“…The correlation between the Irumide belt and Choma-Kalomo block of southern Zambia has had a major influence on models for the tectonic assembly of southern Africa because it required that the intervening Neoproterozoic Zambezi belt was intracratonic and associated with minimal horizontal displacements. …”
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Age and Sources of Late Precambrian Sedimentary Sequences of the Southern Baikal Region: Results of the U–Pb LA-ICP-MS Dating of Detrital Zircons by Gladkochub, D., Nicoli, G., Stanevich, A., Mazukabzov, A., Sklyarov, E., Pisarevsky, Sergei, Donskaya, T., Tait, J.

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U-Pb detrital zircon geochronology and provenance of Neoproterozoic sedimentary rocks in southern Siberia: New insights into breakup of Rodinia and opening of Paleo-Asian Ocean by Gladkochub, D., Donskaya, T., Stanevich, A., Pisarevskiy, Sergei, Zhang, S., Motova, Z., Mazukabzov, A., Li, H.

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Uncovering the Leichhardt Superbasin and Kalkadoon-Leichhardt Complex in the southern Mount Isa Terrane, Australia by Olierook, Hugo, Mervine, E.M., Armstrong, R., Duckworth, R., Evans, Noreen, McDonald, B., Kirkland, Chris, Shantha Kumara, A., Wood, D.G., Cristall, J., Jhala, K., Stirling, D.A., Friedman, I., McInnes, Brent

“…Here, we present zircon U-Pb and Hf isotopic data of granitoids, metabasalts and metasedimentary rocks from seven >1 km deep drill holes that provide a window into the basement geology of the southern parts of the Mount Isa Terrane. …”
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Ion-probe dating of 1.2 Ga collision and crustal architecture in the Namaqua-Natal Province of southern Africa by Pettersson, A., Cornell, D., Moen, H., Reddy, Steven, Evans, D.

“…The Namaqua-Natal Province of southern Africa formed a part of the Kalahari craton, possibly linked to the ~1.0 Ga supercontinent Rodinia, but the timing of assembly and its positioning relation to other components is still debated. …”
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Using in situ SHRIMP U-Pb monazite and xenotime geochronology to determine the age of orogenic gold mineralization: An example from the Paulsens Mine, Southern Pilbara Craton by Fielding, I., Johnson, S., Zi, J., Rasmussen, Birger, Muhling, J., Dunkley, D., Sheppard, S., Wingate, M., Rogers, J.

“…Paulsens is a mesothermal orogenic gold deposit located in the Wyloo Inlier on the southern margin of the Pilbara craton of Western Australia. …”
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Reconnaissance SHRIMP U–Pb zircon geochronology of the Tanzania Craton: Evidence for Neoarchean granitoid–greenstone belts in the Central Tanzania Region and the Southern East African Orogen by Kabete, J., McNaughton, Neal, Groves, D., Mruma, A.

“…Reconnaissance U–Pb sensitive high-resolution ion microprobe (SHRIMP) zircon dating of gneisses, granitoids and greenstones from well-documented study areas within the Tanzania Craton indicates that: (1) ~2815–2691 Ma greenschist-amphibolite facies greenstones and associated granitoids are confined within extensive >3600 Ma granitoid–gneisses in the Central Tanzania Region; (2) greenschist-amphibolite facies greenstone rocks from the Singida-Mayamaya Terrane in the south-eastern Lake Nyanza Superterrane, Lake Victoria Region are older than 2681 Ma; (3) greenschist to lower-granulite facies granitoid–greenstone belts from the Kilindi-Handeni Superterrane, within the largely Neoproterozoic Southern East African Orogen are older than 2670 Ma; and (4) the granitoid–greenstone belts within the Dodoma Basement Superterrane, Central Tanzania Region and Kilindi-Handeni Superterrane, Southern East African Orogen are broadly coeval with ~2823–2671 Ma granitoid–greenstone belts in the Lake Nyanza Superterrane, in the Lake Victoria Region. …”
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Notes on phytosociology of Juniperus excelsa in Macedonia (southern Balkan Peninsula) by Matevski, V., Carni, A., Kostadinovski, M., Marinsek, A., Mucina, Ladislav, Pausic, A., Silc, U.

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3D CBCT McNamara's cephalometric analysis in an adult southern Chinese population by Wong, R., Chau, Anson, Hagg, U.

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The Chiquerío Formation, southern Peru by Chew, D., Kirkland, Chris

“…The Chiquerío Formation (Fm.) is a thick glaciogenic succession deposited unconformably on gneisses of the Arequipa massif in southern Peru. It has undergone greenschist facies metamorphism during Early Palaeozoic orogenesis. …”
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