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This olivine pyroxenite belongs to the PreCambrian Unit Î Yolpx, including the group of late to post transcurrent acid and basic intrusions in the Colatina map, published by the Companhia de Pesquisa de Recursos Mineriais CPRM (Company of Research of Mineral Resources; Tuller 1993). This rock outcrops as a small circular body about 1 Km 2 ...
apatite from an olivine pyroxenite of the canaà valley, espÍrito santo, brazil: fission track age determination and confined track length measurements in order to establish an internal standard. a. do carmo fonseca. download pdf. download full pdf package. this paper.
1075 37. Olivine basalt porphyry 2635 38. Diabase porphyry G. Lamprophyre 39. Lamprophyre H. Peridotite Pyroxenite Family 40. Pyroxenite (harzburgite) 41. Dunite (olivine peridotite) 42. Lamproite 43. Serpentinine II. SEDIMENTARY ROCKS A. Sandstones and Related Rocks 44. Quartz conglomerate
pyroxenite; the latter two lithologies contain variable amounts of hornblende. Dunite occurs in the core of the intrusion and, although the smallest rock unit by volume, is a major host of nickel mineralization. The rock is fi ne grained and contains 9095 vol.% equigranular olivine with sparse euhedral
Extremely low abundance of these tion of wholerock modal and chemical compositions are 1008 BODINIER et al. PYROXENITE^PERIDOTITE VEINED MANTLE Table 2: Continued TOL5bis (lherzolite) TOL6 (olivine websterite) Ol Sp Opx Cpx (n ¼ 8) Ol Opx Cpx (n ¼ 6) Pg wt % SiO2 40 51 55 57 50 33 0 80 40 46 54 99 49 79 1 28 47 93 TiO2 0 279 0 411 1 54 0 ...
whole rock ages of two olivinebearing samples (garnet peridotite and garnetolivine pyroxenite) from the outcrop are ca. 1,255 Ma, whereas two olivinefree garnet pyroxenites yield Lu–Hf ages of ca. 1,185 Ma. All Sm– Nd garnetcpxwhole rock ages of these samples are significantly younger (ca. 1,150 Ma for garnet peridotite
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Pyroxenite is an ultramafic plutonic igneous rock. Ultramafic means that more than 90% of the rock is composed of magnesium and ironrich minerals like pyroxenes, amphiboles, and olivine. Pyroxenite used as Dual flux for pelletisation. The tailormade dual flux, developed through thermodynamic modelling, works well for a wide variety of iron ...
07/11/2018 · Samples of dunite, pyroxenite, olivine basalt and of a dolerite quarry waste material. ... or ex situ, as part of an industrial process, after the mining and crushing/grinding of the rock.
Olivine does not occur in norites, here the dominant mineral is a quartz saturated orthopyroxene. Olivinerich rocks mainly from the Archaean are the source of multibillion dollar nickel mining industry. As the whole of the Earths mantle is composed of more than 80% olivine or its high pressure equivilent, it is the most common mineral knowns.
this study are 2,675; 1,074; 2,386; and 117 ppm respectively. The rocks are generally enriched in high field strength elements whilst rare earth elements value are low, ranging from to ppm. Microscopically, samples can be classified into three groups: olivinehornblende pyroxenite, lherzolite, and olivine websterite.
The mafic–ultramfic complexs, especially the micaolivine pyroxenite breccia pipe and the picritic rocks, are consistent with the hightemperature magma that is related to the mantle plume. On the other hand, the Bachu area is the best candidate for the place where the plume head used to be loed underneath.
The pyroxenite unit in the northeast makes up about 15–20% of the outcropped area of the intrusion. The pyroxenites are mainly websterite and olivine websterite and consist of clinopyroxene (40–50%), orthopyroxene (35–45%), olivine (1–10%), plagioclase (1–10%), along with minor hornblende and spinel.
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Olivine Major and Trace Element Compositions in Southern Payenia Basalts, Argentina: Evidence for Pyroxenite–Peridotite Melt Mixing in a Backarc Setting Nina Søager, ... olivine model and wholerock isotope analyses, Gurenko et al. (2009, 2010, ... The tephra samples were crushed manually in a mortar and sieved. The 1–2 mm fractions were ...
Igneous GO 324A Rocks and Minerals at Emporia State University ... Igneous rock has played a major role in the crustal evolution of Earth and other planetary .... Mafic a composition high in calcium, magnesium, and iron rich silies with a silica content of ... sulfides: galena, sphalerite, chalcopyrite, pyrite. Read more
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