with the exception of potassium, compared to primitive mantle. Enrichment of samples in the range of LILE,

Figure 8. Classification of rocks, according to the chart A (B) Debon & Le Fort [3] .

Figure 9. Classification based on Alkali-Lime (Peacock, 1931) Aluminium saturation index [3] .

could be the result of magma fractionation and crustal contamination. Elements of Zr, Th, Y, have a positive anomaly, and these elements can indicate infection with the upper crust (Figure 12).

According to this model, the Nb element has negative anomaly, and to the upper crust, suggesting the depletion. Elements of Y, Zr are also central to the case, which has enriched and the positive anomalies of these elements may indicate infection with the upper crust. Most elements are near or on the standard line 1, the Upper crust (Figure 13).

5. Conclusions

According to petrographic studies, most igneous rocks of the study area, such as: Quartz syenite, which is a

Figure 10. The chart of A/NK against A/CNK to distinguish peraluminous, metalu- minous and Peralkaline magmas [3] .

Figure 11. The normalized spider diagrams, from the study area samples with normal diagonals [4] .

medium-grained texture and porphyric. Syenite and quartz syenite and plutonic rocks form the bulk of the region. Quartz hornblende syenite is a medium-grained texture, and little alteration in them. The stone, after the quartz syenite, forms the largest rocks in the study area. Alkali granite studied, mostly middle-crystal, is a Porphyric tissue, the tissue indicating shallow magma crystallization, and is often helococrate, or Lococrate. Other gems of the study area, syenite, are without quartz or quartz-poor, and pure tissue. Alkaline quartz syenite, this stone is structured grain. Monzonite, monzonite of the area is gray, and has an average grain texture. Hornblende diorite,

Figure 12. Charts the norm sample of the study area, with primitive mantle (MacDonough & Sun, 1989) [4] .

Figure 13. Normalized charts, samples of the study area, with the upper crust [5] .

medium-grained texture, and rich hornblende and plagioclase, and the sample-and-white are gray.

These rocks are the main minerals including quartz, feldspar, plagioclase, hornblende, and minor minerals, not including Apec, and sphene, and biotite, and secondary minerals, chlorite and sericite are included. According to the graph, normalized samples studied area, with the upper crust, rocks of the study area belong to this pattern, and most elements are near or on line 1 standard.


Gratitude and thanked from the unconditional and unfailing guidance of venerable professor, Mr. Doctor Ardalan who guided me in compiling this article.

Cite this paper

AhmadFarnin, (2016) Geochemical Study of Almoqlaq Intrusive Body in North of Asadabad in Hamedan Province, Iran. Open Journal of Geology,06,47-57. doi: 10.4236/ojg.2016.61006


  1. 1. Middlemost, E.A.K. (1985) Magmas and Magmatic Rocks. An Introduction to Igneous Petrology. Longman Group, UK, 73-87.

  2. 2. Wilson, R. (1990) Igneous Petrogenesis. Unwin Hyman Ltd.,466 p.

  3. 3. Shand, S.J. (1943) Coronas and Coronites. Bull. Geol. Soci. America, No. 56, 247-266.

  4. 4. Sun, S. and McDonough, W.F. (1989) Chemical and Isotopic Systematic of Oceanic Basalts: Implications for Mantle Composition and Processes. Geological Special Publication No. 42, 313-345.

  5. 5. Taylor, R.P. and Mclennan, S.M. (1985) The Continental Crust, Its Composition and Evolution. Black Wall, Oxford, 312 p.

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