scholarly journals Leaky salt: pipe trails record the history of cross‐evaporite fluid escape in the northern Levant Basin, Eastern Mediterranean

2020 ◽  
Author(s):  
Davide Oppo ◽  
Sian Evans ◽  
David Iacopini ◽  
SM Mainul Kabir ◽  
Vittorio Maselli ◽  
...  
2021 ◽  
Author(s):  
Davide Oppo ◽  
Sian Evans ◽  
Christopher A-L Jackson ◽  
David Iacopini ◽  
SM Mainul Kabir ◽  
...  

<p>Hydrocarbon escape systems can be regionally active on multi-million-year timescales. However, reconstructing the timing and evolution of repeated escape events can be challenging because their expression may overlap in time and space. In the northern Levant Basin, eastern Mediterranean, distinct fluid escape episodes from common leakage points formed discrete, cross-evaporite fluid escape pipes, which are preserved in the stratigraphic record due to the coeval Messinian salt tectonics.</p><p>The pipes consistently originate at the crest of prominent sub-salt anticlines, where thinning and hydrofracturing of overlying salt permitted focused fluid flow. Sequential pipes are arranged in several kilometers-long trails that were progressively deformed due to basinward gravity-gliding of salt and its overburden. The correlation of the oldest pipes within 12 trails suggests that margin-wide fluid escape started in the Late Pliocene/Early Pleistocene, coincident with a major phase of uplift of the Levant margin. We interpret that the consequent transfer of overpressure from the deeper basin areas triggered seal failure and cross-evaporite fluid flow. We infer that other triggers, mainly associated with the Messinian Salinity Crisis and compressive tectonics, played a secondary role in the northern Levant Basin. Further phases of fluid escape are unique to each anticline and, despite a common initial cause, long-term fluid escape proceeded independently according to structure-specific characteristics, such as the local dynamics of fluid migration and anticline geometry.</p><p>Whereas cross-evaporite fluid escape in the southern Levant Basin is mainly attributed to the Messinian Salinity Crisis and compaction disequilibrium, we argue that these mechanisms do not apply to the northern Levant Basin; here, fluid escape was mainly driven by the tectonic evolution of the margin. Within this context, our study shows that the causes of cross-evaporite fluid escape can vary over time, act in synergy, and have different impacts in different areas of large salt basins.</p>


2020 ◽  
Author(s):  
Davide Oppo ◽  
Sian Evans ◽  
David Iacopini ◽  
SM Kabir ◽  
Vittorio Maselli ◽  
...  

Author(s):  
Kenneth S. Habib

The Lebanese singer Fairuz is one of the most popular and critically acclaimed performers in the history of Arab musical arts. Born Nuhad Haddad in 1935, Fairuz attained extraordinary success, in great part, through her cultivation of an exceptional command of the voice, her development of a deep individual artistry, and her solid rooting in the performance practices of Lebanese and Arab art and popular song. From early in her career, this achievement was in collaboration with the Rahbani family of composer-poets. Assi Rahbani (b. 1923–d. 1986) and Mansour Rahbani (b. 1925–d. 2009) were siblings who worked together as the duo known as the Rahbani Brothers. Fairuz and the Rahbani Brothers met at the Lebanese Radio Station, where she took her professional name, and they began a collaboration there that gave rise to their first international hit in 1952. Occasionally, younger brother Elias Rahbani (b. 1938–d. 2021) joined in the composing as well. Following the marriage of Fairuz and Assi in 1954, Fairuz gave birth to their first child, Ziad Rahbani (b. 1956), who was raised in the presence of some of the most accomplished artists from across Arab society and who similarly showed a remarkable aptitude for musical arts early in life. Following the death of Assi in 1986, Ziad became the primary composer for Fairuz, after which her lyrical and musical style to some extent began increasingly to reflect more of the sensibilities of a younger generation. Since their beginnings, the Fairuz-Rahbani team has changed with the times and given rise to a prodigious artistic output that has included the production of operettas, musical theater sketches, musical films, and over a hundred record albums. Thematically, the wide-ranging repertoire has sometimes addressed universalistic spiritual matters with references to God, eternity, prayer, and other mystical subjects. The artists also have presented material of more expressly religious character that mentions churches, mosques, and houses of worship; that covers esteemed geographical locales, such as Jerusalem and Mecca; and that presents traditional repertoire like Good Friday chanting and Christmas carols. While Fairuz and the Rahbani composers are Christians, their repertoire has appealed across society irrespective of religious and sectarian affiliation. In the process, Fairuz has become a multifaceted icon to listeners from diverse backgrounds in Lebanon, throughout the eastern Mediterranean, across Arab society, and in the diaspora. As for transliteration of the names from Arabic into Latin script, “Rahbani” is fairly consistent, but “Rahbany” also occurs. The plural (i.e., three or more) is “Rahabina” and also is found in the forms “Rahbaniyun” and “Rahbaniyin” while in English it appears as “Rahbanis” as well. While the duo of the Rahbani Brothers has been consistently translated into English in this way, the Arabic form is either “al-Akhawan Rahbani” or “al-Akhawayn Rahbani” (i.e., the two Rahbani Brothers). “Fairuz,” which means “turquoise” in Arabic, has numerous variants in transliteration stemming, in part, from the various possibilities for each syllable of the name (e.g., Fairouz, Fayruz, etc.), but some degree of standardization has come, in part, from the use of this spelling by Voix de l’Orient, the record label that has produced the bulk of her recordings.


2017 ◽  
Vol 44 (4) ◽  
pp. 573-581
Author(s):  
Xiaobing LIU ◽  
Guangya ZHANG ◽  
Zhixin WEN ◽  
Zhaoming WANG ◽  
Chengpeng SONG ◽  
...  

2015 ◽  
Vol 665 ◽  
pp. 186-198 ◽  
Author(s):  
Yael Sagy ◽  
Zohar Gvirtzman ◽  
Moshe Reshef ◽  
Yizhaq Makovsky
Keyword(s):  

Author(s):  
Sebastian Grohmann ◽  
Susanne W. Fietz ◽  
Ralf Littke ◽  
Samer Bou Daher ◽  
Maria Fernanda Romero-Sarmiento ◽  
...  

Several significant hydrocarbon accumulations were discovered over the past decade in the Levant Basin, Eastern Mediterranean Sea. Onshore studies have investigated potential source rock intervals to the east and south of the Levant Basin, whereas its offshore western margin is still relatively underexplored. Only a few cores were recovered from four boreholes offshore southern Cyprus by the Ocean Drilling Program (ODP) during the drilling campaign Leg 160 in 1995. These wells transect the Eratosthenes Seamount, a drowned bathymetric high, and recovered a thick sequence of both pre- and post-Messinian sedimentary rocks, containing mainly marine marls and shales. In this study, 122 core samples of Late Cretaceous to Messinian age were analyzed in order to identify organic-matter-rich intervals and to determine their depositional environment as well as their source rock potential and thermal maturity. Both Total Organic and Inorganic Carbon (TOC, TIC) analyses as well as Rock-Eval pyrolysis were firstly performed for the complete set of samples whereas Total Sulfur (TS) analysis was only carried out on samples containing significant amount of organic matter (>0.3 wt.% TOC). Based on the Rock-Eval results, eight samples were selected for organic petrographic investigations and twelve samples for analysis of major aliphatic hydrocarbon compounds. The organic content is highly variable in the analyzed samples (0–9.3 wt.%). TS/TOC as well as several biomarker ratios (e.g. Pr/Ph < 2) indicate a deposition under dysoxic conditions for the organic matter-rich sections, which were probably reached during sporadically active upwelling periods. Results prove potential oil prone Type II kerogen source rock intervals of fair to very good quality being present in Turonian to Coniacian (average: TOC = 0.93 wt.%, HI = 319 mg HC/g TOC) and in Bartonian to Priabonian (average: TOC = 4.8 wt.%, HI = 469 mg HC/g TOC) intervals. A precise determination of the actual source rock thickness is prevented by low core recovery rates for the respective intervals. All analyzed samples are immature to early mature. However, the presence of deeper buried, thermally mature source rocks and hydrocarbon migration is indicated by the observation of solid bitumen impregnation in one Upper Cretaceous and in one Lower Eocene sample.


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