The metapelites of Jandagh, (based on mineral assemblages) can be divided into four categories: quartz- muscovite SCHISTs, quartz- muscovite- biotite SCHISTs, garnet- muscovite-chlorite SCHISTs and garnet- muscovite-staurolite SCHISTs. Jandagh's garnet- muscovite-chlorite SCHISTs show the first appearance of garnets. These garnets are basically formed of 58-76% almandine 1-18% spessartine and 8-20% grossular. The microprobe analyses along the Grt in Jandagh's metapelitic rocks show that Mg number of garnets varies and increase from core to rim. This is a feature for prograde metamorphism of metapelitic rocks. The well-preserved garnet growth zoning is a sign that metapelites were rapidly cooled and later metamorphic phases had no effect on these. The appearance of staurolite in garnet- muscovite-chlorite SCHISTs signifies the beginning of amphibolite FACIES. The absence of zoning in the staurolite contained in these SCHISTs suggests the formation and growth of this mineral in a prograde metamorphism occurred at a widely spaced isograde. The thermobarometric study shows that Jandagh's metapelites were formed within a temperature range of 400-670 oC and a pressure range of 2-6.5 kbar. These results are consistent with the minerals' paragenetic evidence and show effect of metamorphism on Jandagh's pelitic sediments in the limit of greenSCHIST and amphibolite FACIES.

The uppermost layers of the Pabdeh Formation in Kuh e-Asmari section consist of microbial (tufa and stromatolite) FACIES interpreted to have been deposited in a lacustrine environment. These deposits are unconformably overlain by basal anhydrite and transitional zone of the Asmari and Pabdeh Formations. The transitional zone is correlated with the lower Asmari (with a basal unconformity or correlative conformity) in the Gachsaran No. 31 and Aghajari No. 61 wells and in Kuh e-Mish, Shahzadeh Abdullah, Tang-Sorgh and Rag-Sefid surface sections. Therefore the basal anhydrite and transitional zone should be considered as a part of the Asmari Formation. The drastic FACIES change near the Pabdeh and Asmari contact is due to thrust-loading, relative sea-level changes and climatic variations close to Ruplian-Chattian BOUNDARY.

The Muth-Golpayegan metamorphic complex is situated at north of Golpayegan city in the Isfahan province. This complex is constituted from different metamorphic rocks including variety of pelitic SCHISTs, amphibolite, gneiss, quartzite and marble. Garnet SCHISTs are dominant lithology in the area and contain different minerals, such as garnet, quartz, chlorite, muscovite, biotite, staurolite, andalusite, kyanite and sillimanite. Lepidoblastic, porphyroblastic, poikiloblastic, augen and millipede are the main textures in these rocks. The degree of metamorphism increases from SW to NE in a way that slate and phyllite at SW change gradually to chlorite SCHIST, biotite SCHIST, garnet SCHIST, staurolite SCHIST, sillimanite SCHIST and kyanite SCHIST. The occurrence of these SCHISTs is accompanied by appearance of chlorite, biotite, garnet, staurolite, sillimanite and kyanite mineralogical zones in the field. The succession of these zones is compatible with Barrovian regional metamorphic gradient. Chlorite, biotite and garnet zones belong to the greenSCHIST FACIES and staurolite, sillimanite and kyanite zones belong to the amphibolite FACIES. Temperature range calculated for these rocks by garnet-biotite thermometry is 471-581 C. This metamorphic gradient is a result of continental collision.

Yapal iron ore body is located in northwest of Sanandaj-Sirjan zone. A complex of Paleozoic metamorphed rocks including green SCHIST, mica SCHIST, chlorite SCHIST with green SCHIST FACIES degree, plus skarn and marble outcrop in this area. . Iron mineralization generally occurs as magnetite with the shapes of lentoid, veins, veinlets and dots in garnet SCHIST and greenSCHIST and near marble outcrop in area. Ore textures are observed as dispersed, stock, replacement and network like. The iron oxide grade varies between 30 to 60 percent. Iron element negatively correlates with sulfur and positively correlates with titanium, magnesium, manganese and the other main oxides. Based on the relation between cobalt and nickel, this ore body is located within hydrothermal-originated category. Some samples are located in the hydrothermal-volcanogenic BOUNDARY. Based on distribution patterns of rare earth elements, Yapal iron ore has more similarities with skarn type mineralizations. Geochemical evidences of magnetite and the variations of cobalt, nickel, silica and aluminum suggest the skarn origin for Yapal iron ore. That means the iron has been mobilized by the hot fluids originated by intrusive stocks and precipitated in contact of metamorphic and marble units.

The fibrolite garnet staurolite mica SCHIST and staurolite garnet mica SCHIST cropped out around the northwest of Khalaj, south of Mashhad in a SE-NW direction along the metamorphic complex of Kuh-e-Majuni. They have similar mineralogy and consist of quartz, annite, staurolite, almandine, muscovite, zircon, and ilmenite; however, fibrolite in fibrolite garnet staurolite mica SCHIST, and chlorite and tourmaline in the staurolite garnet mica SCHIST are additionally found. Application of garnet - biotite thermometry and GBMAQ barometry indicates the temperatures and pressures of 560 and 605oC / 3.5 and 5 kilobar for fibrolite garnet staurolite mica SCHIST and temperatures of 489 and 547oC (in 3.5 to 5 kilobar) for the staurolite garnet mica SCHIST. Pressure and temperature increasing during the garnet growth indicates the effect of regional and contact thermal metamorphism on these rocks. Based on mineral paragenesis in KFMASH system, the metamorphic degree of regional metamorphism was about lower amphibolite (in staurolite garnet mica SCHIST) to middle amphibolite FACIES (in fibrolite garnet staurolite mica SCHIST). Meanwhile, intrusion of the Khalaj granitoid and its thermal diffusion raised the metamorphic temperature up to lower amphibolite FACIES (in staurolite garnet mica SCHIST) and middle amphibolite FACIES (in fibrolite garnet staurolite mica SCHIST), and consequently, this caused the fibrolite formation in the sample close to the pluton (i.e. fibrolite garnet staurolite mica SCHIST).

The metapelites of North of Golpayegan show that these rocks can be divided into four categories based on mineral assemblages: garnet- chloritoid- SCHIST, garnet- SCHIST, garnetstaurolite SCHIST and staurolite- Kyanite- SCHIST. The appearance of chloritoid in garnetchloritoid SCHISTs shows green SCHIST FACIES. Garnets in garnet- SCHISTs shows 3 stage of growth. The appearance of staurolite in garnet- staurolite SCHISTs signifies the beginning of amphibolite FACIES. Petrological changes from garnet- chloritoid- SCHISTs to staurolite- Kyanite SCHISTs shows the formation of this rocks in a prograde metamorphism. The thermodynamic study of these rocks shows that North of Golpayegan's metapelites were formed within a temperature range of 480-560oC and a pressure range of 1.6-4.1 kbar. These results are consistent with the minerals' paragenetic evidence and show that effect of metamorphism on North of Golpayegan's pelitic sediments is to lower amphibolite FACIES (Epidote amphibolite).

Dalan (Upper Permian) and Kangan (Lower Triassic) Formation were deposited in an extensive carbonate platform under an arid climate. These formations makes up the essential part of the Gas reservoirs in south of Iran and Persian Gulf. Detailed field and petrographic investigation of over 1200 meter carbonate sequence of the Kangan and Dalan led to the recognition of several shallow marine (tidal flat, sabtidal, lagoon, bar and open marine) fades. Environment of deposition of these limestone were a Showalling -upward. The transition from Dalan to Kangan denotes a period of drastic change in the deposition environment and the chemical milieu of the sedimentation basin. These changes are reflected by a marked positive excursion of carbon and oxygen isotopes from Kangn to Dalan formation. Petrographic, chemical and isotopic studies of the dolomite in the Kangan and Dalan formations reveal that dolomitization was the result of several diagenetic events.The neomorphic alteration of these dolomites significantly modified their original chemical signatures. Dolomite in the Kangan and Dalan formed in two stages by different mechanisms in Dalan formation dolomitization occur in the early phase of syngenetic (penecontemporaneous) replacement of the pre-existing carbonate in an arid climate on a supratidal flat. Kangan's dolomite formed during deep burial.

The Boroujerd Boroujerd igneous metamorphic complex is part of the Sanandaj-Sirjan structural zone. This igneous complex emplaced in the Upper Jurassic (167 ± 20 million years). This complex intruded into older metamorphic SCHIST and formed the metamorphic halo in the Hornblende hornfels and pyroxene hornfels metamorphic FACIES. A Migmatites observed in parts of the aureole that is evidence of local increased geothermal gradient in the Boroujerd aureole contact metamorphism. Quartz, feldspar and with mica are main minerals in leucosome migmatites part, and orthopyroxene +garnet+sillimanite+cordierite +corundum are present in the melanosome part. In the high P-T location indicated temperature and pressure above the pyroxene hornfels FACIES and equal to lower BOUNDARY of the granulate FACIES. Associated garnet-biotite cation exchange, maximum temperature is 635-720° C. The maximum pressure is 3-4 Kbar. This temperature and pressure are higher than normal contact metamorphism and this P-T condition can crystallize special minerals, such as corundum.

Zarab region situated in south of Baft city and Northern BOUNDARY of Sanandaj-Sirjan zone. Petrographical studies indicate Rock units get moderately green SCHIST FACIES metamorphism grade and contain of: orthogenesis, Marble and abundance SCHIST's in Zarab region.We can see flow structures in marble and various microstructures as like S-C structures, and structures Mica Fishes and et… in SCHIST' s. We could recognize dextral shear sense, which caused Microstructures. The amounts of tension strains in normal section that prepared from oriented samples indicate prolate form strain ellipsoid parallel to SCHISTosity fabrics. Field studies show, which the thrust faults, have a dextral movement (co orientation with microstructures shear sense), similar orientation, slip movement and absence of fault plan erosion. Varieties between faulting deformation (brittle deformation) and shear sense of microstructures (ductile deformation), reveal two deformation phase with a nonconcurring deformation time and brittle deformation took place in second stage.

Halab-Mianaj metamorphic area is part of Takab Precambrian metamorphic complex that exposed in north-west of Iran. Halab-Mianaj cross section included a group of metamorphic rocks that have been metamorphosed in the greenSCHIST and amphibolite FACIES. Garnet porphyroblasts chemical composition in garnet SCHIST rocks is in almandine range. Amphibole composition in Amphibole SCHIST and meta-diorite rocks are calcic and are changed from actinolite to magnesio hornblende.Chemical compositions of the Plagioclase crystals are between albite to oligoclase range. The maximum temperature for garnet SCHIST rocks based on Grt-Bt thermometer determined 552oC that indicates epidote-amphibolite FACIES. Temperature and pressure metamorphic in the amphibole SCHIST and meta-diorite based on amph-plag thermobarometer determined about 420 - 487oC and 3.9 - 6.7 K-bar that shows the beginning amphibolite FACIES. Therefore, the geothermal gradient bases on Halab-Mianaj metamorphic rocks with different protolith approximately are 30±1oC/km.