E3.S1bE3.S2E3.S1B ?E3.S1E3.S1E3.S1 E3.S2 3.3.1 E3.S1. The metamorphic sole, the mylonitised harzburgites and the Samail Thrust?: The metamorphic sole appears on Fanja and Bidbid area. The harzburgites are the base of the ophiolite which can be seen clearly because of its location, as it comes precisely before the metamorphic sole. Based on that, it exposed in the same area.Starting with the first studied outcrop in the beginning of the wadi, where the harzburgite was spotted their Figure (3.3.1). The observed minerals were black and when we approached the rocks we sow a lot of fractures and white and green veins recognized that they are carbonates because bubbles appear when the acid was added on. The white mineral in the veins is magnesite? and within the magnesite there is greenish mineral called ?Serpentine that aggregated as fabric that expand along the structure of the rock (figure). The colour of ?the rocks was light green (silky lustre) to dark green or black (greasy lustre) however, the light ?green is younger than the dark green (Jesus, 2016). And the grain size of the rocks was ?course-grained in the lighter rocks and very fine-grained in the dark rocks. This harzburgite have mylonitic foliation and it is very close to bottom of the ophiolite. ?In the metamorphic sole away from the ophiolite. The studied area contains ?various metamorphic facies like amphibolite (Quartz and Amphibole), granulite and assorted ?greenschist. The minerals that included in the rock were Amphibole, Pyroxene, Quartz and Plagioclase. ?The outcrop has a clear foliation measured as 25550° and the grains size were medium to fine grains. ?It also has green colour (chlorite sheets). There are rock close to the amphibolite and contained the same minerals that appeared in the ?preceding outcrop and in this outcrop, there is a green mineral which is epidote, so the rock name ?is epidote amphibolite. ?Figure. E3.S1 outcrop represent the harzburgites ( taken by H. Al Aisaee) – the scale is M. Al Haliq , and he is approximately 178 cm long. Figure. Recent carbonates form after the deformation of the rock due to the presence of water fluid (Jesus, 2017) (photo taken by H. Al Aisaee) .Figure. Harzburgites with magnesite veins (taken by H. Al Aisaee). Figure. Shows the mylonated harzburgites with intense foliation ?(taken by H. Al Aisaee)?. 3.3.1 E3.S2. The ListveneitesFold anticlineListveneitesMetamorphic soleOphioliteOphioliteSN6m100mTectonic contact Tectonic contact Tectonic contact Tectonic contact Fold175/88002/70148/65In the exact area of Samail Ophiolite along the basalt thrust there are several types of rocks have ?been noticed. however, the harzburgites appears again. The studied outcrop was full of faults as a ?tectonic contact. Hard yellowish to orange colour rocks were recognized in the area called listvanite. These rocks are full of fractures and contain calcite and magnesite minerals ?(Jesus, 2016).The grain size is fine to medium grains. ?It is reacted with HCl acid. Figure. Fold anticline of the listveneite and the measurement for each fold (skitch H. Al Aisaee)Figure. E3.S2 , anticline Fold represents a tectonic contact between Sumail ophiolite, lisveneties? and the metamorphic sole. 4. Interpretation & Discussion ?4.2. The metamorphic sole of the Samail Ophiolite and the Samail Thrust ?Near to the base of the ophiolite, the metamorphic sole occurs in two various locations in Oman, specifically in Wadi Tayyip in the eastern mountains of Al Sharqiyah Region and in the north in the Sumeini Window (Cowan, 2014).The metamorphic sole is beneath and within tectonic slab of the Sumail ophiolite and it represent ?oceanic igneous and sedimentary rocks that metamorphized. The metamorphic sole was expanded in E3.S1 and E3.S2. consequently, the metamorphic sole forms when ?oceanic and continental margin rocks under arrest the subducted mass and? the Arabian margin of ?the Sumail ophiolite. However, the metamorphic sole is thin up to two hundred meters shown in the figure bellow (Hacker et al., 1996; Wakabayashi and Dilek, 2003).? Figure. The main lithology of Oman ophiolite and metamorphic sole (Cited on Cowan et al. 2014)The metamorphic sole accommodates several facies, from the granulite through amphibolite to ?greenschist. The sequence is arranged from the top to the bottom. And the facies show a diversity ?in metamorphism gradient depends on diverse pressure and temperature (Cowan 2014). Starting ?with ? the greenschist, which observed in (E3.S1) and its main components of it are quartzites and ?marble. It was formed under temperature ranges between ?475–550 ?C ? and pressure around 4.5–??5.5 kbar (Cowan, 2014). However, the greenschist ?formations, placed in an ?area which is relative to ?the ophiolite naap (A. Nicolas).? ?The greenschist followed by amphibolite facies which recognized in ?E3.S1 ( Fanja and Bidbid) that perform the amphibolite rocks and the epidote amphibolite while the ?epidote appears due to the hydrothermal alteration. The rock formed under temperature ?between 700–750?C while the pressure is under 2-12 kbar (Cowan, 2014). Followed at the end by ?the granulite facies which formed under temperature ranges between 770–900 ?C whereas the ?pressure extends between 11–13 kbar (Cowan, 2014). Another point is the rocks of the sole, ?where in the top of the sole the rocks are characterized by course ?grained while, the rocks in the ?bottom of the sole are fine-grained texture.?Figure. Epidot Amphibolite rock from the metamorphic sole at the base of the ophiolite napps (taken by H. Al Aisaee). (Oceanic crust)Figure. The skitch above illustrate the formation of the metamorphic sole. Which formed due to interoceanic subduction in Triassic period bellow younger Sumail sequence ?(Jesus, 2017). The Sumail Thrust The Sumail thrust appears in E3.S2 and it links between the ophiolite and the metamorphic sole. In E3.S2 (Fanja and Bidbid) the rocks are ranging between yellowish to orange carbonated rocks due ?to its main component which is iron carbonate. Also, the rock includes a lot of fractures that filled with ?calcite and Magnesite. Ultimately, the description above it indicate the lisveneties (Jesus, 2017). ?The lisveneties rocks produced when the Peridotite is completely carbonated (ultra-mafic rock) ?due to the metamorphic dehydration of the autochthonous rocks. when CO2-rich fluids interact ?with the primary minerals of Peridotite which are olivine and orthopyroxene. After that, the primary minerals converted into ?secondary minerals such as calcite and magnesite. the lisveneties rocks formed at elevated ?temperature up to 200?.?