A QAPF diagram is a doubled-triangle plot diagram used to classify intrusive igneous rocks based on their mineralogy. The acronym QAPF stands for "Quartz...
7 KB (856 words) - 00:13, 27 July 2024
from the otherwise similar basanite. It's parameters are defined in the QAPF diagram. Occurrences include leucite nepheline tephrite from Hamberg bei Neckarelz...
1 KB (115 words) - 22:41, 18 August 2024
feldspar, or feldspathoid minerals, classification begins with the QAPF diagram. The relative abundances of quartz (Q), alkali feldspar (A), plagioclase...
19 KB (2,320 words) - 17:26, 18 October 2024
feldspar, or feldspathoid minerals, classification begins with the QAPF diagram. The relative abundances of quartz (Q), alkali feldspar (A), plagioclase...
23 KB (2,458 words) - 11:51, 12 August 2024
plagioclase. This places andesite in the basalt/andesite field of the QAPF diagram. Andesite is further distinguished from basalt by its silica content...
25 KB (2,760 words) - 00:21, 27 September 2024
minerals present. These percentages place the rock somewhere on the QAPF diagram, which often immediately determines the rock type. In a few cases, such...
48 KB (5,656 words) - 02:36, 23 June 2024
rocks, and most plutonic rocks are classified by where they fall in the QAPF diagram. Dioritic and gabbroic rocks are further distinguished by whether the...
10 KB (1,171 words) - 07:47, 11 June 2024
Monzogranite is a plutonic rock that occupies the middle of the QAPF diagram, consisting of between 20-60% quartz, and of the remainder, between 35-65%...
6 KB (602 words) - 00:40, 10 June 2024
which can be mistaken for rhyolites. For phaneritic felsic rocks, the QAPF diagram should be used, and a name given according to the granite nomenclature...
6 KB (651 words) - 22:09, 25 October 2024
ranging from granite to diorite, including granodiorite. According to the QAPF diagram, granodiorite has a greater than 20% quartz by volume, and between 65%...
8 KB (838 words) - 08:05, 20 September 2024