Diorite

Dktte,/. (more commonly, Tinte) ink. diorithaltig, a. containing diorite, dioritlo. DlnrtelUssiliife, /. dioraeilinie asid. 

Kugel-dioriti m. globular diorite. -dreieck, n. Geom.) spherical triangle, -druckprobe, /. ball pressure test (for hardness), Brinel)... 

Figure 1.73. Distribution of epithermal Au-Ag vein-type deposits, propylitic and advanced argillic alterations and intrusive rocks of diorite prophyry (Shikazono, 1985a).

In vertisols on diorite, basalt, alluvions, and dolerite, total Mn is in the range of 1250-2750 mg/kg, while brown isohumic soils on calcareous sandstone and clayey sediments contain 550-1670 mg/kg Mn. Soils in the Adelaide and Southeast regions contain 140-1400 mg/kg total Mn. In solods on granitic rocks and alluvions, total Mn is 60-990 mg/kg. 

In vertisols on diorite and basalt of Queensland, total Zn is 120 mg/kg, while Mediterranean red soils average 11-86 mg/kg of total Zn. Soils on calcareous sandstone and on clayey sediments contain 45-100 mg/kg of total Zn. 

Bedrock and surficial Geology At Shiko Lake (Fig. 1) a Jurassic complex composed of diorite, monzonite, and syenite intrudes basalt and volcaniclastic rocks. Chalcopyrite, bornite, and gold occur disseminated and in veins mainly within the syenite (Fig. 2). 

The amli pluton is subalkaline and calc-alkaline, and mainly diorite porphyry, granodiorite, quartz monzonite, and granite-porphyry in composition (Fig. 3). The metadiabase is alkali basalt in composition,... 

Continuous series Discontiriuous series of crystallization Intermediate (andesite/ diorite)... 

Occurrence calc-alkaline granites, sienites, diorites and corresponding effusive terms,... 

Biotite Gabbros, norites, diorites, granites, pegmatites Phyllites, chlorite-sericite schists, biotite facies of the regional metamorphism, gneisses ... 

The Wangjiazhuang Cu deposit is situated in Zouping County, Shangdong, China. The ore bodies are hosted in quartz diorite covered by 80 m of alluvium. The ore... 

Petrographic observations were made on polished thin sections, for 313 outcrop samples. Average sample spacing was one sample per 1 km within a radius of 15 km or less from the known porphyry Cu-Mo deposits, and one sample per 2 km outside this area. Five rock types are distinguished in the district andesites, diorites, granodiorites, dacites, rhyolites and sandstones. Rhyolites and dacites dominate in the zone of known porphyry Cu-Mo deposits. Sandstones are much less common and were not studied. 

In diorite, granodiorite and andesites, propylitic alteration is characterized by... 

Rock type Granodiorites Diorites Andesites Chlorite, Epidote, Carbonates, Albite Chlorite, Epidote, Sericite, Rare carbonate veinlets... 

The Miocene stratigraphy in the Baguio District has been intruded by a series of Pliocene rocks. The homblende-phyric Mafic Dike Complex intruded the central part of the Baguio District at 4.5 - 4 Ma (Waters et al. submitted). The complex is characterized by dense clusters of coarsely hornblende phenocrystic dikes with evidence for multiple injections. Several Pliocene to Pleistocene dioritic intrusive complexes are associated with porphyry copper-gold mineralization in the Baguio district. The Black Mountain Intrusive Complex includes the Black Mountain quartz diorite and the Mexico Diorite, as well as andesite dykes that have yielded ages of between 3.14 and 2.78 Ma (Waters et al. submitted Sweet etal. 2008). Other Pliocene intrusive rocks... 

The Pinguino veins, occupy more than 30 fault controlled structures. They have a NW and ENE strike and are hosted in Triassic continental sedimentary rocks and lower Jurassic epiclastic and volcaniclastic rocks, and are spatially related to lower Jurassic subvolcanic dioritic intrusions, basaltic sills and andesitic porphyries (Jovic etal. 2005). 

Tonalitic phase 6 dykes are quartz- and plagioclase-rich (An43.4g up to Ange-ga near skarn), and have undergone calcic metasomatism with replacement of K-feldspar by plagioclase and destruction of biotite. Dioritic phase 6 dykes are quartz... 

Three intrusions occur in the QB open pit and drill core. These consist of (/) Carboniferous diorite that was intruded by (/ /) Late Eocene granodiorite, and (///) later quartz-feldspar porphyry dykes of granodiorite composition. 

A scatterpiot of Ti02 vs. Zr (Fig. 7) iiiustrates that three distinct modes are present in the supergene dataset (granodiorite, QFP, and diorite). 

Diorite, granodiorite, and QFP can be discriminated using TiOa concentrations and Zr/TiOa mass and Al/Ti molar ratios. Granodiorite with Anio piagioclase was intruded by QFP with up to Anas piagioclase. Granodiorite is intensely phyiiicaiiy altered whereas QFP is commonly less altered. Potassic alteration is not well expressed in this... 

The Pebble district comprises Jura-Cretaceous andesitic argillite, siltstone and wacke, cut by diorite sills (Bouley et al. 1995). Diverse intrusions occupy a northeast-trending structural corridor. Subalkalic granodiorite intrusions (91-89 Ma) include the Kaskanak Batholith and smaller satellite bodies that are genetically related to Cu-Au-Mo mineralization (Lang etal. 2007). 

The major rock units in the East-Kahang are made up of andesite, volcanic breccia, dacite, quartz-diorite, diorite and locally mineralized hydrothermal breccia (Fig. 2). Eocene andesite and volcanic breccias showing propylitic alteration are the oldest units in the area. They have been intruded by dacite, mostly showing phyllic alteration associated with weak copper mineralization. Quartz-diorite and dioritic... 

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