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1. |
Record Nr. |
UNINA9910495212103321 |
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Autore |
Wu Chung-Che |
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Titolo |
Advanced and applied studies on ultra-trace rare earth elements (REEs) in carbonates using SN-ICPMS and LA-ICPMS / / Chung-Che Wu |
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Pubbl/distr/stampa |
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Singapore : , : Springer, , [2021] |
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©2021 |
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ISBN |
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Edizione |
[1st ed. 2021.] |
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Descrizione fisica |
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1 online resource (XV, 64 p. 22 illus., 16 illus. in color.) |
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Collana |
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Springer Theses, Recognizing Outstanding Ph.D. Research, , 2190-5061 |
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Disciplina |
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Soggetti |
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Geochemistry |
Climatology |
Environmental chemistry |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Nota di contenuto |
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Introduction -- Approach I: Direct determination of carbonate REES in femtogram quantities by solution nebulization-inductively coupled plasma mass spectrometry(SN-ICPMS) -- Application I: Pinatubo volcanic eruption exacerbated an abrupt coral mortality event in 1991 summer -- Approach II: Highly-sensitive open-cell laser ablation-inductively coupled plasma mass spectrometry(LA-ICPMS) approaches for the quantification of rare earth elements in carbonates at parts-per-billion levels -- Application II: Stalagmite-based micro-domain tephra fingerprints in East Timor between 88 to 78 ka BP -- Summary and perspective. |
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Sommario/riassunto |
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This book provides two state-of-the-art quantitative techniques to determine ultra-trace rare earth elements (REEs) in natural carbonates using solution nebulization-inductively coupled plasma mass spectrometry (SN-ICPMS) and laser ablation-inductively coupled plasma mass spectrometry (LA-ICPMS) with respective applications were presented in this dissertation. These techniques were applied to natural carbonates, including corals and stalagmites, to understand volcano eruptions and the impacts on modern biosystem and paleoclimate regimes. In the first SN-ICPMS protocol, direct measurements for femtogram quantity carbonate samples without chemical separation |
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steps can offer accurate and high-precision analysis (±1.9-6.5%, 2σ) with a high sample throughput of 8-10 samples/hr routinely. Application to modern Porites corals collected from South China Sea region, the anomalies of REE contents and Al/Ca ratios associated with micro-domain images, register modern coral reefs could be exacerbated by volcanic eruptions. In the second protocol, a high-sensitivity quantitative open-cell LA-ICPMS technique has been established to allow direct sampling on stalagmite surface in the atmospheric air. This technique improved limits of detection down to sub-ng/g range and promises analyses of carbonate REE profiles at the single digit parts-per-billion (ppb) levels. Application to a 15-cm stalagmite collected from East Timor reveals two peaks of REE contents by at least one order of magnitude, possibly due to volcanic ash preserved in stalagmite. Both improved SN-ICPMS and LA-ICPMS techniques highlight the high-sensitivity and high-temporal-resolution carbonate REE analyses for corals and stalagmites, with great potential to other natural carbonates such as travertine, tufa, and flowstone, benefit our understanding of paleoclimatic and paleoenvironmental dynamics. |
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2. |
Record Nr. |
UNINA9910131262903321 |
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Autore |
Burga Manuel |
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Titolo |
Choquequirao : Símbolo de la resistencia andina (historia, antropología y lingüística) |
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Pubbl/distr/stampa |
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Lima, : Institut français d’études andines, 2015 |
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ISBN |
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Descrizione fisica |
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1 online resource (228 p.) |
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Altri autori (Persone) |
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LomnéGeorges |
Meza BMario |
Meza BazánMario |
Ramírez PonceAbdie |
TorresEunice Cortez |
BurgaManuel |
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Soggetti |
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Geography |
History & Archaeology |
archéologie |
Pérou |
époque coloniale |
époque précolombienne |
ethnie |
histoire |
Incas |
culture inca |
Apurímac |
arqueología |
cultura Inca |
período colonial |
período precolombino |
grupo étnico |
historia |
Perú |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Sommario/riassunto |
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La residencia construida para el último Inca y su familia red con técnicas y manos Chachapoyas, en un lugar tan remoto como el que ocupa Machu Picchu, es ahora conocida como Complejo Arqueológico Choquequirao. Huayna Cápac nunca la ocupó, pero sí sus descendientes, quienes resistieron el poder y la religión de un rey desconocido; así, durante 36 años fue extraña a los asedios de los conquistadores y escenario de convivencia de la élite inca con las etnias antis, amazónicas. Choquequirao se muestra hoy al mundo desde las alturas del distrito de Santa Teresa, La Convención, Cusco, como pétreo símbolo de la resistencia andina y nuevo icono de la identidad peruana. |
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