منابع مشابه
Alkaline Rocks and Geodynamics
105 Abstract: Origin of A-type alkali feldspar granites is currently the subject of a world-wide debate. Contrasting hypotheses have been proposed, which range from an entirely crustal origin to an almost complete mantle derivation. A-type alkali feldspar granites belong to either unimodal granite (rhyolite)-dominated association, or bimodal gabbro (basalt)-granite (rhyolite) suite. It is argue...
متن کاملSouth West Africa Cases: Preliminary Objections
ETHIOPIA and Liberia, in applications to the International Court of Justice, alleged that the Union of South Africa [South Africa] has violated Article 22 of the Covenant of the League of Nations and the terms of a Mandate under which it has responsibility for administering the Territory of South West Africa. Specifically the petitioning states charge that South Africa, in administering the ter...
متن کاملThe Petrology and Geochemistry of Granitoid Rocks of Troud Area in South-West of Shahrood
The area of study is located 120 Km north-east of Shahrood city. In terms of structure and geological classification, this area is located in the northern part of central Iran zone. Granitoids of Troud ranging from monzonite to granite. The main minerals of granitoids are quartz, plagioclase, and orthose. The accessory minerals are biotite, hornblende, sphene, and opaque minerals. Various textu...
متن کاملEcandrewsite – Zincian Pyrophanite from Lujavrite, Pilansberg Alkaline Complex, South Africa
Ilmenite-group titanates are relatively common accessory minerals in agpaitic nepheline syenite (lujavrite) in the Pilansberg alkaline complex, South Africa. They crystallized in three generations and form a continuous ecandrewsite – pyrophanite solidsolution extending from (Zn0.81Mn0.12Fe0.07)TiO3 to (Mn0.93Fe0.7)TiO3. The earliest generation of ferroan manganoan ecandrewsite of widely varying...
متن کاملA responsibility to protect Africa from the West? South Africa and the NATO Intervention in Libya
This article will argue that South Africa‟s approach to conflict mediation and peace building is informed by the ANC‟s experience of the transition to democracy in South Africa and is widely misinterpreted. This was particularly evident in the Libyan crisis, where South Africa was widely accused of exhibiting a morally duplicitous and ideologically rudderless foreign policy because of the manne...
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ژورنال
عنوان ژورنال: Geological Magazine
سال: 1915
ISSN: 0016-7568,1469-5081
DOI: 10.1017/s0016756800203877