Andrea Mundl-Petermeier

Andrea Mundl-Petermeier
International Atomic Energy Agency (IAEA) | IAEA · Department of Safeguards

PhD

About

31
Publications
3,850
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500
Citations
Citations since 2017
21 Research Items
489 Citations
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2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150

Publications

Publications (31)
Article
Full-text available
New isotopic studies on mantle xenoliths from Santa Cruz Province, southern Patagonia, Argentina, reveal that at least three discrete subcontinental lithospheric mantle (SCLM) domains—the Deseado Massif, Tres Lagos, and Pali Aike—form the southernmost part of South America. Re-Os systematics yield early Paleoproterozoic (up to 2.5 Ga) SCLM formatio...
Preprint
The existence of resolvable 182W/184W deficits in modern ocean island basalts (OIB) relative to the bulk silicate Earth has raised questions about the relationship of these rocks to Earth’s core. However, because the core is expected to host high abundances of highly siderophile elements (HSE), it would be expected that such heterogeneity is accomp...
Article
Full-text available
The Bushveld Complex of South Africa is underlain by a fine-grained sill complex which most workers interpret to represent the quenched parent magmas to the intrusion. The sills have unusually high Pt contents (up to ~ 25 ppb) and Pt/Pd ratios (average 1.50) exceeding those in most other mantle magmas globally. Unusually high Pt/Pd is also found in...
Article
Full-text available
Radiogenic isotope systems are important geochemical tools to unravel geodynamic processes on Earth. Applied to ancient marine chemical sediments such as banded iron formations , the short-lived 182 Hf-182 W isotope system can serve as key instrument to decipher Earth's geodynamic evolution. Here we show high-precision 182 W isotope data of the 2.7...
Preprint
Radiogenic isotope systems are important geochemical tools to unravel geodynamic processes on Earth1. Applied to ancient marine chemical sediments such as banded iron formations (BIFs), the short-lived 182Hf-182W isotope system can serve as key instrument to decipher Earth’s geodynamic evolution. High-precision 182W isotope data of the 2.7 Ga old B...
Conference Paper
Bushveld magmas have unusually high PGE contents and Pt/Pd ratios. This could be due to melting of PGE rich mantle containing undissolved Late Veneer. However, the available W and Ru isotope data suggest the Bushveld magmas are derived from normal mantle
Article
Full-text available
Significance The recent discovery of anomalous ¹⁸² W signatures in modern, plume-derived hotspot lavas provides evidence for survival of domains in Earth’s interior since the early Hadean. Only lavas with ancient, high- ³ He/ ⁴ He signatures preserve anomalous ¹⁸² W signatures. However, it is not known why only high- ³ He/ ⁴ He lavas have anomalous...
Article
Rhenium-Os, PtOs, SmNd, LuHf, and HfW isotope data, together with lithophile trace element and highly siderophile element (HSE: Re, Os, Ir, Ru, Pt, and Pd) abundances, are reported for 2.05 Ga Jeesiörova and Kevitsa komatiites from the Central Lapland Greenstone Belt, Fennoscandia, Finland. Both komatiites are closely genetically related, with the...
Chapter
During its accretionary phase, planet Earth differentiated into a metallic core and a silicate mantle. This process eventually led to the current structure of Earth's layered interior (inner core, outer core, mantle and crust). Geophysical studies show that the boundary between Earth's metallic core and its silicate mantle is distinct and is charac...
Article
The short-lived 182Hf-182W isotope system (t1/2 = 9 Ma) left evidence in both ancient and modern terrestrial rock record of processes that took place during the earliest stages of Earth’s accretionary and differentiation history. We report µ182W values (the deviation of 182W/184W of a sample from that of laboratory standards, in parts per million)...
Article
Full-text available
Studies of short-lived radiogenic isotope systems and noble gas isotopic compositions of plume-derived rocks suggest the existence of primordial domains in Earth's present-day mantle. Tungsten-182 anomalies together with high 3He/4He in Phanerozoic rocks from large igneous provinces and ocean island basalts demonstrate the preservation of early-for...
Article
One requirement for accurate, high‐precision isotope ratio measurements is that the element of interest is completely separated from the sample matrix. Efficient chemical separation of W from matrix components, especially Ti, can be challenging, particularly for large test portion masses (> 1 g). We present a new W separation method that takes adva...
Article
Study of igneous and sedimentary rocks that may be representative of the chemical and isotopic characteristics of portions of the upper continental crust (UCC) has provided important insights to the origin and growth of the continents, as well as the large-scale chemical evolution of the silicate Earth. For example, changes in the major and trace e...
Article
Full-text available
New tungsten isotope data for modern ocean island basalts (OIB) from Hawaii, Samoa, and Iceland reveal variable 182W/184W, ranging from that of the ambient upper mantle to ratios as much as 18 parts per million lower. The tungsten isotopic data negatively correlate with 3He/4He. These data indicate that each OIB system accesses domains within Earth...
Article
Here we describe a new analytical technique for the high-precision measurement of ¹⁸²W/¹⁸⁴W and ¹⁸³W/¹⁸⁴W using negative thermal ionization mass spectrometry (N-TIMS). We improve on the recently reported method of Trinquier et al. (2016), which described using Faraday cup collectors coupled with amplifiers utilizing 10¹³ Ω resistors to continuously...
Article
Alkali basalt hosted mantle xenoliths were sampled at four locations within the North Patagonian Massif, Argentina. The subcontinental lithospheric mantle (SCLM) beneath Comallo, Puesto Diaz and Cerro Chenque is mostly represented by spinel-harzburgites, whereas at Prahuaniyeu, spinel–garnet- and garnet-peridotites occur next to spinel-peridotites....
Conference Paper
Mantle xenoliths transported to the surface by alkali basalts from 6 different outcrops in Santa Cruz Province, Southern Patagonia were studied with focus on their petrography, whole rock and mineral chemistry, as well as their Re-Os and Lu-Hf isotopic compositions. The sample suite collected at Don Camilo, Gobernador Gregores, Tres Lagos and withi...
Conference Paper
Full-text available
Alkali basalt hosted mantle xenoliths from 3 different areas in South Patagonia were studied with regard to their petrography and chemical, as well as their Re-Os and Lu-Hf isotopic compositions. The Pali Aike Volcanic Field (PAVF) located in the very south of Patagonia comprises sample localities Salsa, El Ruido and Potrok Aike. About 300 km north...
Conference Paper
Fifty modally unmetasomatized samples were chosen from 6 different outcrops in S. Patagonia. While sample suites from Don Camilo, Gobernador Gregores and Tres Lagos comprise Sp-lherzolites and Sp-harzburgites, samples from Potrok Aike, Salsa and El Ruido, all located within the Pali Aike Volcanic Field (PAVF), comprise also Sp-Gt-lherzolites and Sp...
Conference Paper
Full-text available
Thirty samples from Pali Aike Volcanic Field (PAVF) and Tres Lagos in Southern Patagonia comprise Sp-lherzolites, Sp-harzburgites, Sp-Gt-lherzolites and Sp-Gt-harzburgites. According to Cpx REE and other trace element patterns, the samples can be divided in 3 Groups within Sp-peridotites and 3 within Sp-Gt-peridotites. Group I Sp-peridotites show...
Conference Paper
Full-text available
The Pali Aike Volcanic Field (PAVF) situated in the back-arc tectonic setting of southern Patagonia is one of the two Patagonian localities where garnet and spinel peridotites are brought to the surface by alkaline basalts. The other locality is Prahuaniyeu in northern Patagonia (Bjerg et al., 2009). The xenoliths from the PAVF were collected at Sa...
Conference Paper
The Pali Aike Volcanic Field (PAVF) situated in the back-arc tectonic setting of southern Patagonia is one of the two Patagonian localities where garnet and spinel peridotites are brought to the surface by alkaline basalts. The other locality is Prahuaniyeu in northern Patagonia. The xenoliths from the PAVF were collected at Salsa, El Ruido and Pot...
Article
Full-text available
Mantle xenoliths from Don Camilo, an area located on the North margin of the Deseado Masiff in Patagonia, comprise spinel bearing lherzolites, harburgites and dunites, wehrlites, clinopyroxenites and gabbros. The most common rock type in our collection is spinel-lherzolite followed by dunites. Harzurgites, wehrlites and gabbros are less widespread....
Article
Full-text available
Mantle xenoliths in alkalibasalts from Don Camilo, an area located at the North margin of the Deseado Massif in Patagonia, comprise mainly spinel-bearing lherzolites and dunites as well as less common harburgites, wehrlites, clinopyroxenites and gabbros. Spinel-lherzolites and harzburgites have protogranular textures whereas dunites have equigranul...

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