Rock classification plutonic igneous rocks

Strecbeisen A., 1976, To each plutonic rock its proper name. Earth. Sci. Rev., 12, 1-33. Streckeisen A. and Le Maitre R.W., 1979, A chemical approximation to the modal Q F classification of igneous rocks. Neues Yahrb. MineruL Abh., 136, 169-206. 

Fig. 3.21 The classification of plutonic igneous rocks by Streckeisen (1967, 1976) is based on the modal abundances of quartz (Q), alkali feldspar (including albite, An < 5%) (A), and plagioclase (An >5%) (P). The fields have been numbered in order to identify the rock types that correspond to them 1. quartz, 2. alkali granite, 3. granite, 4. granodiorite, 5a. quartz diorite (trondhjemite), 5b. quartz diorite (tonalite), 6. alkali syenite, 7a. quartz syenite, 7b. syenite, 8a. quartz monzonite (adamellite), 8b. monzonite, 9a. monzodiorite, 9b. monzogabbro, 10. diorite/gabbro (Adapted from Streckeisen 1967)...

Fig. 5.17 The plutons of Hope Granite that intruded the metasedimentary basement rocks of the Shackleton-Glacier area are collectively referred to as the Queen Maud batholith. The modal concentrations of Quartz (Q), alkali feldspar (A), and plagioclase (P) are used to classify a representative collection of the Hope Granite from this area (see also Fig. 3.21, Appendix 3.6.1). The distribution of data points indicates that the Hope Granite consists of granite (field 3), granodiorite (field 4), and quartz diorite (field 5) (Data by Wade and Cathey (1986) and classification of plutonic igneous rocks by Streckeisen (1967))...

Mathews G. W. A classification of uranium deposits in and related to plutonic igneous rock. Reference 15, 15-21. 

Streckeisen, A.L. Classification and Nomenclature of Plutonic Rocks. Recommendations of the lUGS Subcommission on the Systematics of Igneous Rocks. Geologische Rundschau. Internationale Zemchrift far Geologie, 63 (2) (1974) 773-785. 

Figure 13.5. Classification of Ultramafic Rocks [after Streckeisen, A.L. - Classification and Nomenclature of Plutonic Rocks. Recommendations of the lUGS Subcommission on the Systematics of Igneous Rocks. - Ge-ologische Rundschau. Internationale Zeitschrift fur Geologie, 63 (2) 773-785. Copyright 1974 Springer-Verlag and reproduced with kind permission of Springer Science and Business Media.] Ol + Opx + Cpx + Hbl (+ Bi + Gar + Sp) > 95 Opaque minerals < 5 a. ultramafic rocks composed of olivine, orthopyroxene, and clinopyroxene b. ultramafic rocks that contain horneblende.

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