|
|
|
New Data about the Tectonic Structure of the Arabian Plate by Interpretation of Space images
5- Group of faults passing to the east of Alaqaba gulf they reach the eastern south sides of the Dead Sea in Jordan and they expand for more than 500km.
In addition to the mentioned faults zones, there are two faults zones in the eastern south side of the Arabian Plate within Oman and Emirates lands and they take arch shape. There are also some faults with left lateral displacement.
The faults of eastern north direction:
The Arabian plate is distinguished by the existence of big fault inside the Saudi Arabia lands (Waddi Arram and Wadi Albaten fault) it takes the direction of eastern north and expand for more than 800km, 400km from it is inside the Arabian shield of 45? angle then it turns towards north of 60? angle and reach Shat AlArab area. Its trace appears clearly inside the sediment rocks of different ages, this refers to its late activity zone and perhaps it is active till now. Also there are faults surround the Palmyra fold belt from south and north, they are big of deep occurrence. The southern faults seem clearer than the northern ones which covered by recent sediments and they expand towards eastern north for several hundred kilometers. They deviated from the rift to the north of Teberias lake. The Palmyra fold belt form Aolacogin depression which has been formed in the beginning of the Mesozoic, then it was exposed to folding and faulting at the end of the Mesozoic and the beginning of the Cenozoic till its end.
There are several faults of the eastern north direction or near to the transverse ones on the eastern south sides of the big annular structure inside Saudi Arabia lands and they expand from ten to hundred kilometers which lead to complicate the plate structure.
The Volcanic Rocks:
The Arabian plate is characterized by the spread of volcanic rocks in several sites as the areas expand to the east and south of Maka and Medina on an extension about 600km, and in the far western south of the plate in Adan and Taez in Yemen.The important volcanic rocks spread in the western north side –in several areas- in the Syrian areas, especially in the south of Syria and Jordan, and north of Saudi Arabia where this area is considered as one of the big volcanic areas in the world, it expands towards western north and eastern south on 500km distance which covered more than 45000 km (Volcanic Harrat Asham area) it starts from the south of Damascus and it covers Horan , Jabal AlArab and Telol Alsafa in Syria, then it passes Jordan between Arroweshed, AlAzrak and Erbed of length 180km and then it continues in Saudi Arabia on an extension of 210km on the eastern side of Wadi Sarhan these rocks related to the mentioned faults in the volcanic area.
The ages of these rocks are related to Neogene (Miocene, Pliocene) and Quaternary (with its different stages), the eruptions continue for the past several southands years in the south of Syria. Several cones and craters appear inside this volcanic area, some of them are in the south of Syria (more than 400 volcanoes), alkaline basalt rocks prevail on it; its thickness reaches 1000m in Syria.
|
|
|