[PDF] Top 20 El régimen semiabierto como beneficio de los privados de libertad

... The characteristic features of MaIanjkhand porphyry type deposit a r e large tonnage, low grade, simple mineralogy, presence of stockwork, association with I type granitoid[r] ... See full document

... ore deposit types have different fluid sources, metal sources, and depositional mechanisms, all of which can significantly affect the trace element content of the minerals that precipitate from them (Gregory et ... See full document

... the copper content in the solution could be deposited as a result of boiling processes as chalcopyrite which was the major mineral at the Ali Javad deposit (similar to porphyry copper ...the ... See full document

... 5-10 TsNaCl and TsKCl data for type III inclusions from quartz-Cu,Fe sulphide veins and quartz phenocrysts.. All data available are given in the histograms.[r] ... See full document

... The features described above are broadly similar to the occurrences of PGM in the Río Blanco PCD, reported in this technical note. Our observations indicate that Pd, Pt, Au, Ag, and Te form micrometer to nanometer-sized ... See full document

... The porphyry-type alteration zones transition from early potassium-silicate alteration through quartz sericite alter- ation to propylitization, upward and outward from the core of the quartz monzonite ... See full document

... The presence of stringer type of ore in quartz veins, disseminated sulphide mineralisation associated with ferromagnesian assemblages, and quartz vein selvages in Malanj[r] ... See full document

... medium-grained and coarse-grained sulfides and silica minerals, in the silicic ore horizon. The cryptocrys- talline or jasper type of silica was formed during depositional stage. While fine to very coarse-grained ... See full document

... Potassic Alteration Comparison of sample 25- 453 (representative of the potassic zone) with least altered sample 30-138 shows that the immobile elements, Ti, Al and Ga plot close to or on a line of constant mass with a ... See full document

... Teak (Tectona grandis) is the economical tree species commonly recommended for plantation programmes in dry tropical regions for timber production. The durability and workability of teak were recognized in our country, ... See full document

... alkalic porphyry Au–Cu deposit is located in the Molong Volcanic Belt of the Macquarie Arc, part of the Lachlan Fold Belt in eastern ...subvertical porphyry pipes, dikes and stocks of monzodiorite ... See full document

... These was a distinct change in magmatic compositions from the Late Oligocene to Early Miocene, with emplacement of small alkaline to ultrapotassic intrusive centres at the tip of the Cag[r] ... See full document

... Abbreviations: all= alteration, bt- biotite alteration, dac = dacite, dec= decrepitation, inc= fluid inclusions, Na-K-fld = Na-K-feldspar alteration zone, op = opaque, pot= potassic zone[r] ... See full document

... Two samples of LM stage tourmaline and anhydrite breccia cement have Sr-Nd values similar to the premineralization Teniente volcanic complex and Teniente plutonic complex host rocks Tabl[r] ... See full document

... Samples of hydrothermal quartz for fluid inclusions analysis were grouped into five spatial domains: 1 the intense, pervasive Na-K-feldspar alteration zone, in and proximal to the dacite[r] ... See full document

... The stereonets plot the Late Hydrothermal veins from the mine areas, indicating the dominant Late Hydrothermal vein orientation is concentric and steeply inward dipping towards the Brade[r] ... See full document

... Biotite and Na-K-feldspar stable vein assemblages stage 2a, 2b, 2c, 2d, 2e veins and breccias occur in the potassic zone in the deposit centre, whereas sericite - chlorite stable vein as[r] ... See full document

... These rocks have been intruded by, in order of emplacement, the Sewell Diorite, the grey porphyry, a series of dacitic intrusions dacite pipes, a dacite porphyry dyke, and late dacite dy[r] ... See full document

... The fault zone has controlled the emplacement of the Sewell Diorite intrusive complex 8.9- 7.0 Ma; Morel and Sprohnle, 1992; Kay and Kurtz, 1995, and the Agua Amarga and El Teniente alte[r] ... See full document

... Mineralogical, isotopic, and fluid inclusion datasets at El Teniente indicate that a complex interplay of processes occurred during ore formation, including fluid mixing, cooling, oxidat[r] ... See full document