Granitic injection complex of Harris, Outer Hebrides

Conjugate cummingtonite and hornblende at Sgeir nan Sgarbh, South Harris, Outer Hebrides

The Hebrides

The papar names in the Western Isles are restricted to the north Hebrides. The reasons for this distinction between north and south Hebrides have already been speculated on above (3.2. Situation in the Hebrides; also in Crawford, 2005, 94). Is it a reflection of the different toponymic (place-name) pattern in the two areas? Or has it something to do with the pre-Norse political /ecclesiastical ...

Mesonorms of granitic rock analyses

SINCE Cross, Iddings, Pirsson, and Washington 09o3) first published their system of deriving normative minerals from chemical analyses, the CIPW norm has been successfully used to identify, compare, and classify trends in igneous rocks with similar or differing mineral compositions. The norm has been used for metamorphic rocks and rocks of somewhat uncertain mode of origin (Bowes, ~967). Variou...

Petrography and Physicomechanical Properties of Rocks from the Ambela Granitic Complex, NW Pakistan

Petrography and physicomechanical properties of alkali granites, alkali quartz syenite, and nepheline syenite from Ambela, NW Pakistan, have been investigated. Whereas the alkali quartz syenite and most of the alkali granites are megaporphyritic, the nepheline syenite and some of the alkali granites are microporphyritic. Their phenocryst shape and size and abundance of groundmass are also diffe...

Assessing Inheritance of Zircon and Monazite in Granitic Rocks from the Monashee Complex, Canadian Cordillera

Zircon and monazite from granitic sheets and dikes in the Monashee complex, Canadian Cordillera, were investigated to determine whether igneous crystallization occurred at 1.9 Ga or 50 Ma with 1.9 Ga inherited zircon and monazite. Four of the five samples are weakly deformed to undeformed, despite occurring in a gneiss dome at the structurally deepest exposed level of the orogen that elsewhere ...