 | Beurlen, Hartmut, Da Silva, Marcelo R. R., Thomas, Rainer, Soares, Dwight R., Olivier, Patrick (2008) Nb–Ta–(Ti–Sn) oxide mineral chemistry as tracer of rare-element granitic pegmatite fractionation in the Borborema Province, Northeastern Brazil. Mineralium Deposita, 43 (2) 207-228 doi:10.1007/s00126-007-0152-4 | Journal (article/letter/editorial) | | fractionation in the Borborema Province, Northeastern Brazil Hartmut Beurlen & Marcelo R. R. Da Silva & Rainer...Borborema Pegmatitic Province (BPP), northeastern Brazil, is historically important for tantalum mining...Equador Formation. The trace-element ratios in feldspar and micas allow to classify most pegmatites as...n., Cidade Universitária, 50740-530 Recife, PE, Brazil e-mail: beurlen@terra.com.br M. R. R. Da Silva...n., Cidade Universitária, 50740-530 Recife, PE, Brazil M. R. R. Da Silva e-mail: marcelor@ufpe.br R. Thomas |  | | Journal (article/letter/editorial) | | from the Borborema Pegmatite Province, northeast Brazil H. BEURLEN1,*, A. MÜLLER2, D. SILVA3 1 2 3 AND...Hélio Ramos s.n., 50740530, Recife, Pernambuco, Brazil Geological Survey of Norway, Leiv Eirikssons vei...Univesitária Zeferino Vaz, 13083-970Campinas, São Paulo, Brazil [Received 16 July 2010; Accepted 12 July 2011]...from the Borborema Pegmatite Province in northeast Brazil were analysed for fourteen trace elements using...respective limits of detection (Na, K, Rb, Ca, Sr, Mn, Fe) in most samples. K EY WORDS : trace elements, quartz |  | Wang, Ru Cheng, Yu, A-Peng, Chen, Jun, Xie, Lei, Lu, Jian-Jun, Zhu, Jin-Chu (2012) Cassiterite exsolution with ilmenite lamellae in magnetite from the Huashan metaluminous tin granite in southern China. Mineralogy and Petrology, 105 (1) 71-84 doi:10.1007/s00710-012-0194-x | Journal (article/letter/editorial) | | firstly described in the Lost River skarn tin deposit, Alaska (Desborough and Sainsbury 1970). Beurlen...537 Fe3+ W Sn 0.001 Ca Mn 0.029 Octahedral 5.574 K 1.723 Na 0.006 Interlayer 1.729 F 0.275 Fe=ðFe þ MgÞ...40%), potassic feldspar (35%), plagioclase (17%), and biotite (7%). Some of the feldspar demonstrates a...that is interstitial to biotite, quartz, and K-feldspar is a late-magmatic phase and is spatially associated...cassiterite in ilmenite from the Pitombeiras pegmatite in NE Brazil are likely related to a Sn-rich ilmenite |  | Beurlen, H., Barreto, S. B., Silva, D., Wirth, R., Olivier, P. (2007) TITANIAN IXIOLITE - NIOBIAN RUTILE INTERGROWTHS FROM THE BORBOREMA PEGMATITIC PROVINCE, NORTHEASTERN BRAZIL. The Canadian Mineralogist, 45 (6) 1367-1387 doi:10.3749/canmin.45.6.1367 | Journal (article/letter/editorial) | | THE BORBOREMA PEGMATITIC PROVINCE, NORTHEASTERN BRAZIL Hartmut BEURLEN§ Programa de PG em Geociências...Hélio Ramos s.n., 50740–530 Recife, Pernambuco, Brazil Sandra Brito BARRETO Deptamento de Geologia, Universidade...Hélio Ramos s.n., 50740–530, Recife, Pernambuco, Brazil Dailto SILVA Instituto de Geociências, IGE–UNICAMP...Barão Geraldo, 13083–970 Campinas, São Paulo State, Brazil Richard WIRTH GeoForschungsZentrum Potsdam, Telegrafenberg...Hélio Ramos s.n., 50740–530, Recife, Pernambuco, Brazil Abstract Intergrowths of orthorhombic and tetragonal |  | | Journal (article/letter/editorial) | | the solubility of Nb2O5 and Ta2O5 in this system. K E Y WO R D S : ilmenite, pyrophanite, titanohematite...assemblage, which is constituted mainly by perthitic K-feldspar and quartz, both in crystals elongated along...(aquamarine) are present in the core zone; quartz + K-feldspar graphic textures may be dominant in the wall-intermediate...surrounding, the SEM-EDS chemical analyses of the needles do not fit the expected columbite stoichiometry, and...determines for both structures the presence of –h + k + l = 3n reflections only, but in hematite, because |  | | Journal (article/letter/editorial) | | LiSn-Ta-(Nb) pegmatites such as the Greenbushes deposit, Western Australia (Partington et al. 1995), Sn-Cu-Pb-Zn...et al. 2015), the Breves Cu-Au-(W-Bi-Sn) deposit in Brazil (Tallarico et al. 2004), and some intrusion-related...reconciled with Fe substitu‑ tion reactions that do not involve Nb or Ta. Izoret et al. (1985) propose...Saltwater Creek deposit (SC1 and SC2), two from the greisen zone of the Buriti mine (BM1 and BM2), and...Saltwater Creek, Tasmania, Australia Buriti Mine, Goiás, Brazil Mount Bischoff, Tasmania, Australia Saltwater |
|
