...ABDEL-FATTAH M. ABDEL-RAHMAN; NANCY A. LEASE Abstract Mafic–ultramafic Quaternary lava flows form the Tigris volcanic field (covering 1750 km 2 ) at the northeastern tip of Syria and extend into Turkey. This volcanic field occurs between the Euphrates graben and the Bitlis–Zagros collision suture...

...Fig. 10.— Provenance analysis. Beaches of the northern Gulf and dunes from the Jafurah to the northeastern Rub' al Khali ergs are derived partly from Mesopotamian sources (Euphrates + Tigris Rivers), with contribution from Arabian sources (mostly Paleozoic siliciclastic strata) rapidly increasing...

...Andrew R. Farrant; Ian Mounteney; Amy Burton; Robert J. Thomas; Nick M. W. Roberts; Robert W. O. Knox; Thomas Bide Abstract The Rub’ al-Khali dune field in southern Arabia is the largest sand sea in the world. Deciphering the palaeoenvironmental history of the Rub’ al-Khali is critical...

... the principal oil fields of Iran and Iraq. These folds continue, but are smaller and less well delineated, westward into northwestern Iraq and northern Syria. They occur in a syncline of great depth and magnitude ( Fig. 2 ). In southeastern Turkey and northern Iraq the Tigris and Euphrates rivers originate...

... Fars. Miocene .—Outside of the area where the thick continental deposits occur, the Miocene may be divided into an upper cavernous limestone and a lower series of pinkish shales and sandstones with gypsum. On the right bank of the Tigris, grayish brown limestones are extensively developed...

...D. J. Burdon Summary The geology of Middle East is summarized under the subheadings: Precambrian basement, epicontinental sediments, geosynclinal and shelf deposits, Tertiary volcanics and Quaternary cover. The main tectonic episodes including epeirogenic movements, rifting and the Tertiary orogeny...

... sandstones and red chert 55 Red and green conglomerates with large angular volcanic pebbles. Sandstones with red and green speckles 110 Metamorphosed sandstones with dark reddish quartzites and igneous apophyses 645 Felsites, vesicular basalt, dark hematitic sandstones. Base not observed...

...) , and Contenau (1954) . Probably the earliest extant map of part of the region is a Babylonian baked clay tablet possibly showing the Tigris and Euphrates rivers and dating from about 2500 B. C. ( Raisz, 1948 , p. 5). One of the earliest recorded voyages on the Persian Gulf was completed in 323 B.C. by Nearchus...

... with rounded epidotes, hornblende, garnet, and ultrastables, pointing to extensive recycling also fostered by Quaternary changes. The Rub'-Al-Khali and Wahibah sand seas have distinct quartz/feldspar ratios, reflecting largely separate transport pathways. Dune fields, fed chiefly from rift highlands...

... in prebiotic biosynthesis experiments (Leeming and Leeming 1995). In early civilizations established around major river systems, such as the Nile, Euphrates-Tigris, and Indus, annual flooding brought clay and silt that re-fertilized soils for agriculture. Clay was also an important raw material for making...

... ) Photomicrographs of framework grains in the sandstone of the Ahwaz Member ( a ), lower Aghajari unit ( b , c ) and Lahbari Member ( d ). Qm, monocrystalline quartz; Qp, polycrystalline quartz; Lm, metamorphic lithic; Lv, volcanic lithic; Lc, carbonate lithic; Cht, chert lithic. ( e ) Field photograph showing...

... , N.A. (2012) Petrogenesis of Cenozoic mafic– ultramafic alkaline lavas from the Tigris volcanic field, NE Syria . Geol. Mag. , v. 149 (1) , pp. 1 – 18 . Aldanmaza , E. , Pearcea , J.A. , Thirlwallb , M.F. , Mitchel , J.G. (2000) Petrogenetic evolution of late Cenozoic...

... of engineering work in deserts in which geomorphological studies have a role to play, especially with respect to resource appraisals and to the environmental hazards in arid and semi-arid areas. The analysis of aerial photographs and field survey to map features and deposits of engineering significance can...

... felsic volcanic rocks. This raised the question, might these clay deposits be associated with epithermal systems? Subsequently, an orientation visit was conducted in August 1988 to field-check the main clay deposits and existing gold mines. After inspecting several clay deposits (in particular the large...

...¨phan, Tendu¨rek, Ararat in Turkey, and Sahand and Sabalan in Iran), whereas in the north by an extensive (over 5000 km2) and relatively flat volcanic field (Kars plateau) with an average elevation of c. 1.5 km above sea level. This volcanic field consists mainly of lava flows intercalated...

... et al. , 1986 ; Fig. 2 and 3 ), most of the volcanic rocks of early Karacadağ activity are basalts (~ 73 % of the sample population), with minor hawaiites (~15 %) and basanites (~10 %). Only one sample plots in the andesite field with 61.5 wt% SiO 2 and one sample straddles the hawaiite-mugearite...

... the Iraqi border. The Euphrates graben system likely formed in a transtensional regime, with active rifting primarily restricted to the Senonian and with an estimated maximum extension of about 6 km. Minor Cenozoic inversion of some structures also is evident. Approximately 30 oil fields have been...

.... , 1973 , Trace elements and organic matter content in the Cretaceous sediments of the Rumaila oil field (southern Iraq) : Univ. Baghdad, Coll. Sci. Bull. , v. 12-13 , p. 217 - 241 . Al-Rawi , D. , 1973 , A contribution to the geology and the structure of Jebel Sinjar : Zeitschr. Geol...

... 19 04 1998 15 05 1998 © 1998 GULF PETROLINK CC BY-NC. All rights reserved 1998 GULF PETROLINK CC BY-NC Most of the oil fields and exploration programs in Iraq are concentrated in the eastern part of the country in mainly shallow Mesozoic and Tertiary reservoirs ( Figure 1...