1. Y. Majigsuren, A. Kitakaze and S. Jargalan

2. I. Western Khubsugul II. Eastern Khubsugul III. Tesiin gol IV. Khanui gol V. Orkhon-Selenge VI. Ugii nuur VII. Tariat-Chuluut VIII. Southern Khangai IX. Dolina-Ozer X. Baruun khuurai XI.Dzabkhan. XII.Gobi Altai XIII. North Gobi XIV. Mandal Gobi XV. Undurshil XVI. Dariganga XVII. Khalkhiin gol

4. D

7. Pyroxene Sanidine OlivinePyrope

8. Mandalgobi-basalt. Macrocrystals of biotite in melanocratic fine phenocrysts groundmass.

9. Shavariin -Tsaram lherzolite. Altered garnet, brown spinel and clinopyroxene in the groundmass.

10. Mandalgobi basalt. Contact of garnet dark glassy volcanic showing some macroxenocrysts and fine phenocrysts

11. Shavariin Tsaram basalts. The macrocrystals include orthopyroxenes of enstatite, garnet, plagioclase and xenolyths of host rock.

12. Mandalgobi basalts. Ground mass of limburgite basalt, showing feldspar microlites, or glassy groundmass. The macrocrystals include pyroxene, olivine and apatite.

13. Euhedral phenocrysts of magnesium –rich olivine and more iron rich olivine occur on the rims of the phenocrysts and the groundmass. Chemical composition of olivine varies from Fo 68.5 to Fo 99.6. Olivines in Shavariin-Tsaram basalt (Fo 69 - Fo 99.6 ) show higher Fo content comparing to Mandalgobi basalt (Fo 69.5 -Fo 90.7 ).

14.  Pyroxenes are mostly in groundmass in Shavariin-Tsaram basalt, and in phenocryst and groundmass in Mandalgobi basalt. Pyroxenes are mostly diopside, and some of them are enstatite in composition. No compositional difference observed between pyroxene in Shavariin- Tsaram basalt and Mandalgobi basalt. DiopsideHedenbergite Enstatite Ferrosilite

15. Plagioclases are in phenocryst and groundmass. Plagioclace varies in composition

16. Xenocrysts of red to dark red colored garnet (pyrope) occur only in Shavariin Tsaram basalt. Pyrope is very low TiO2 and Cr2O3. Cr2O3 below levels typical of diamondiferous kimberlite or lamproite. CaO levels too high for the given Cr2O3 values for diamondiferous source.

17. SiO 2 wt% Tas Diagram Shavar Tsaram basalt is picritic basalt in composition, while Mandalgobi basalt is basaltic andesite. Geochemistry of basaltic rock shows that they are high potassium calc alkaline and composition. SiO 2 content varies from 48.8 to 50.7-wt%, while it ranges from 44.2 to 45.8 wt% in Mandalgobi basalt.

18. Major element variation diagrams for the Shavariin–Tsaram and Mandalgobi basalts. Basalts Shavariin-Tsaram having lower TiO 2, Fe 2 O 3, MgO, CaO and higher Al 2 O 3 and Na 2 O than Mandalgobi basalts.

19. On MORB normalized trace element spider diagram show basaltic rocks of two areas show similar characteristics. Rocks are enriched in LILE and almost similar to similar with MORB value in HFSE