Výsledky vyhledávání - "Hannes B. Mattsson"

The role of mafic dykes in the petrogenesis of the Archean Siilinjärvi carbonatite complex, east-central Finland

Autor: Hannes B. Mattsson, Karin Högdahl, Alireza Malehmir, Matias Carlsson

Publikováno v: Lithos. :468-479

The Archean (~2.6 Ga) Siilinjarvi carbonatite complex in east-central Finland is crosscut by a few ultramafic lamprophyre dykes, together with a broad array of more evolved mafic dykes that range in composition from foidites to various types of alkal

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::47329fb50d76738465a196b2203c9563
https://doi.org/10.1016/j.lithos.2019.06.011

Zobrazit plný text záznamu

Magnetic characterisation of magnetite and hematite from the Blötberget apatite – iron oxide deposits (Bergslagen), south-central Sweden

Autor: Andreas Björk, Daniel Hedlund, Emma Bäckström, Hannes B. Mattsson, Karin Högdahl, Klas Gunnarsson, Bjarne Almqvist, Paul Marsden, Alireza Malehmir

Publikováno v: Canadian Journal of Earth Sciences. 56:948-957

Rock magnetic measurements were carried out on drill core material and hand specimens from the Blötberget apatite – iron oxide deposit in the Bergslagen ore province, south-central Sweden, to characterise their magnetic properties. Measurements in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bc0c9f1261004f824b7081aa70616a59
https://doi.org/10.1139/cjes-2018-0183

Zobrazit plný text záznamu

Mineral resorption triggers explosive mixed silicate–carbonatite eruptions

Autor: Hannes B. Mattsson, Max W. Schmidt, Daniel Weidendorfer

Publikováno v: Earth and Planetary Science Letters. 510:219-230

Historic eruptions of Earth's only active carbonatite volcano, Oldoinyo Lengai (Tanzania), have repeatedly switched from low energy carbonatite lava extrusion to highly energetic explosive silicate volcanism, most recently in 1966–67 and 2007–08.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee1b7f0fe84733b7e01c9669dbf9468d
https://doi.org/10.1016/j.epsl.2019.01.003

Zobrazit plný text záznamu

In-situ garnet 238U-230Th geochronology of Holocene silica-undersaturated volcanic tuffs at millennial-scale precision

Autor: István Dunkl, Hannes B. Mattsson, Olivier Bachmann, Anna Balashova, Jörn-Frederik Wotzlaw, Francesca Forni, Marcel Guillong

Publikováno v: Quaternary Geochronology. 50:1-7

Radioisotopic dates for Late Pleistocene to Holocene silica-undersaturated volcanic rocks are often imprecise, limiting our ability to assess the frequency of eruptions in alkaline volcanic provinces, evaluate related volcanic risk and date associate

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a44a9e29a746f0335c100191ac55db2
https://doi.org/10.1016/j.quageo.2018.10.004

Zobrazit plný text záznamu

Control of the stress field and rift structures on the distribution and morphology of explosive volcanic craters in the Manyara and Albertine rifts

Autor: Audray Delcamp, Sophie Mossoux, Matthieu Kervyn, C. Tweheyo, Hannes B. Mattsson, H. Belkus

Monogenetic volcanoes are widespread in the East African Rift. Their morphologies are diverse with positive (scoria and tuff cones) and negative reliefs (tuff rings and maars). The Manyara Rift (Tanzania) and Albertine Rift (Uganda) are characterised

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::78eb4f9638fc690bb1e2f0102a8ab9b2
https://hdl.handle.net/20.500.14017/753df2ba-49b3-4d35-8d82-b82307814061

Zobrazit plný text záznamu

The Lake Natron Footprint Tuff (northern Tanzania): volcanic source, depositional processes and age constraints from field relations

Autor: Bjarne Almqvist, Anna Balashova, Ann M. Hirt, Hannes B. Mattsson

Publikováno v: Journal of Quaternary Science. 31:526-537

The Engare Sero Footprint Site, situated on the southern shore of Lake Natron in northern Tanzania, has been reported to host one of the best preserved sets of fossilized hominid footprints in the ...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::86909c7409234fd05eaaa4e38d9d9f34
https://doi.org/10.1002/jqs.2876

Zobrazit plný text záznamu

New tephrostratigraphic data from Lake Emakat (northern Tanzania): Implications for the eruptive history of the Oldoinyo Lengai volcano

Autor: Ann M. Hirt, Hannes B. Mattsson, Anna Balashova

Publikováno v: Journal of African Earth Sciences, 147

The northern Tanzanian sector of the Gregory Rift is an area of an active continental rifting, in which sedimentation processes are strongly affected by volcanism . Due to limited stratigraphic exposure, the volcanic record of the region is rather sp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a86b007534c4a003e414ec243084a2e3
https://hdl.handle.net/20.500.11850/275578

Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání