...D.A. Zedgenizov; V.S. Shatsky; A.V. Panin; O.V. Evtushenko; A.L. Ragozin; H. Kagi Abstract Evidence for phase transitions in mineral inclusions in superdeep diamonds of alluvial placers in the São Luiz River deposits (Brazil) is obtained by the electron backscatter diffraction technique. It has...

...-resolved luminescence spectroscopy of specific microzones of these diamonds, were carried out before. Therefore, we examined diamonds of the well-known São Luiz deposit (Brazil) which contained macro- and microinclusions, whose formation, according to ( Kaminsky et al., 2001 ), took place at the depth...

.... In this study, we describe the first observation of merwinite (Ca 2.85 Mg 0.96 Fe 0.11 Si 2.04 O 8 ) in a diamond; it occurs as an inclusion in the central growth domain of a diamond from the São Luiz river alluvial deposits (Juina, Brazil). In addition, the diamond contains inclusions of walstromite-structured...

...Figure 1. Inclusion-bearing diamond studied in this work (dodecahedron recovered from alluvial deposits of the São Luiz River, in the Juina area of Mato Grosso State, Brazil). Inclusions studied are indicated with arrows. ...

...-MgSiPvk-CaSiPvk assemblages. Only a few deposits contain diamonds of both sublithospheric assemblages; these include the São Luiz–Juina area, Brazil ( Harte et al., 1999 ), and Kankan, Guinea ( Stachel et al., 2000a , 2000b ). In southern Gondwana, Mesozoic kimberlites carrying sublithospheric...

... mineral from an inclusion in an alluvial diamond from São Luiz river, Juina district of Mato Grosso, Brazil. Its density is 3.576 g/cm 3 and its microhardness is ∼7. Jeffbenite is uniaxial (–) with refractive indexes ω = 1.733(5) and ε = 1.721(5). The crystals are in general transparent emerald green. Its...

...Danilo Jotta Ariza Ferreira; Wagner Moreira Lupinacci; Igor de Andrade Neves; João Paulo Rodrigues Zambrini; André Luiz Ferrari; Luiz Antonio Pierantoni Gamboa; Maria Olho Azul ABSTRACT Mapping of seismic and lithological facies is a very complex process, especially in regions with low seismic...

..., Cajati county, São Paulo state, Brazil Luiz A.D. Menezes Filho*, Daniel Atencio, Marcelo B. Andrade, Robert T. Downs, Mário L.S.C. Chaves, Antônio W. Romano, Ricardo Scholz and Aba C. Persiano *E-mail: lmenezesminerals@gmail.com Polymorphous with isolueshite, lueshite and natroniobite...

...Igor de Andrade Neves; Wagner Moreira Lupinacci; Danilo Jotta Ariza Ferreira; João Paulo Rodrigues Zambrini; Luís Otávio Aguiar Oliveira; Maria Olho Azul; André Luiz Ferrari; Luiz Antonio Pierantoni Gamboa Abstract Presalt reservoirs of the Santos Basin accounted for more than 50% of Brazilian...

... ferropericlase inclusion in a diamond from the São Luiz alluvial deposits of Brazil. P hoto by J effrey W. H arris . Mineral inclusions in diamonds are overwhelmingly derived from the two principal rock types occurring in the deep lithosphere, peridotite and eclogite (e.g., Meyer 1987 ). Although...

... assessments of what they see in a reflection section, seeking events indicative of deposition patterns, lateral continuity of the reflections, frequency, and strength of the amplitude signal ( Nascimento et al., 2014 ). On the other hand, trace attributes provide descriptive and quantitative parameters...

... ) would involve a volume increase of ~33%. However, kinetic factors and the retention of high residual pressures within the diamonds may prevent all the decreasing pressure equilibrium reactions from occurring. The lower mantle samples chosen for study come from the São Luiz alluvial deposit, which...

...Ana Flávia Trabuco Duarte; Pétala Gomes Ribeiro; André Luiz da Costa Moreira; Luciano Paganucci de Queiroz; Francisco de Assis Ribeiro dos Santos Abstract Studies have shown that Acacia Mill. sensu lato consists of seven genera ( Acacia sensu stricto , Acaciella Britton & Rose, Mariosousa...

.... 2 Promon Engenharia S/A, Avenida Sao Luiz, 86. This work is part of a Ph.D. dissertation presented in July 1973 at the State University of New York, Binghamton. The work was supported by grants from the Society of the Sigma Xi, the Center for Solid Earth Research of the State University of New...