Chemical zoning of muscovite megacrystal from the Brazilian Pegmatite Province

Autor: Rúbia R. Viana, Hanna J. Evangelista, Willem B. Stern

Publikováno v: Anais da Academia Brasileira de Ciências, Vol 79, Iss 3, Pp 431-439 (2007)

Macroscopically homogenous muscovite plate from the Cruzeiro pegmatite, located in the Eastern Pegmatite Province in Minas Gerais, may show complex distribution patterns of some trace elements. In geochronological and petrological studies, as for exa

Externí odkaz: https://doaj.org/article/0679b3c002324df786881e8a20212abb

Phosphate: a neglected argument in studies of ancient glass technology

Autor: Willem B. Stern

Publikováno v: Swiss Journal of Geosciences. 110:725-740

The phosphate content of ancient alkali-glass has been tested as an indicator for biogenic ash, used in glass production. The living tissue of plants and vertebrates accumulates phosphate that remains in native ash as a main component (1 to over 10 w

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e47b92927834653b81563efcef9e9ca5
https://doi.org/10.1007/s00015-016-0242-3

Amino Acids in Iron Oxide Mineralization: (Incomplete) Crystal Phase Selection Is Achieved Even with Single Amino Acids

Autor: Fabia Gozzo, Katharina M. Fromm, Bernd Schmitt, Andreas Taubert, Yvonne Gerber, Adeline Y. Robin, Willem B. Stern, Alexandre Mantion, Monika Painsi

Publikováno v: The Journal of Physical Chemistry C. 112:12104-12110

Iron oxides are important minerals in biology and materials science. Using biomimetic synthesis, a variety of iron oxides have been fabricated. However, it is still not clear how growth modifiers like amino acids and peptides select different crystal

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::43dea68c990e9d1a283a566fa006f430
https://doi.org/10.1021/jp075449u

Geochemistry of muscovite from pegmatites of the Eastern Brazilian pegmatite province: a clue to petrogenesis and mineralization potential

Autor: Hanna Jordt-Evangelista, Rúbia R. Viana, Willem B. Stern

Publikováno v: European Journal of Mineralogy. 19:745-755

Single crystals of muscovite ( N = 143) from different zones of selected granitic pegmatites belonging to two well-known gem-producing districts of the Eastern Brazilian Pegmatite Province (northern Aracuai and western Governador Valadares in Minas G

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f9f168b6e322b5eb0a91e3b9796d8bf8
https://doi.org/10.1127/0935-1221/2007/0019-1760

Volcanic ash layers in the Upper Cretaceous of the Central Apennines and a numerical age for the early Campanian

Autor: Daniel Bernoulli, Simonetta Monechi, Willem B. Stern, Michèle Caron, M. Frey, Urs Schaltegger

Publikováno v: International Journal of Earth Sciences, Vol. 93, No 3 (2004) pp. 384-399
Bernoulli, Daniel; Schaltegger, Urs; Stern, Willem B.; Frey, Martin; Caron, Michèle; Monechi, Simonetta (2004). Volcanic ash layers in the Upper Cretaceous of the Central Apennines and a numerical age for the early Campanian. International journal of earth sciences, 93(3), pp. 384-399. Springer-Verlag 10.1007/s00531-004-0389-4

At Montagna della Maiella and at Gola del Furlo (central Apennines) two discrete layers of bentonic clay are intercalated within the pelagic (Furlo) and turbiditic/ pelagic limestones (Maiella) of the Upper Cretaceous basinal succession of the Umbria

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9228152a4a1aa18c726fb7dc65b98080
https://doi.org/10.1007/s00531-004-0389-4