ABSTRACTThe Cretaceous (Albian‐Turonian) Talme Yafe Formation is a huge prismshaped accumulation ... more ABSTRACTThe Cretaceous (Albian‐Turonian) Talme Yafe Formation is a huge prismshaped accumulation (more than 3000 m thick, about 20 km wide, and at least 150 km long) of calcareous detritus at the northwest continental margin of the Arabian Craton (Israel). Its sources of clastic material are biochemical carbonates and skeletal fragments derived from rudistid reefs deposited on the wide epicontinental platform located east of the accumulation site. Transport of the material from the shelf platform over the edge onto the slope was probably done by storms and by tidal and seasonal currents. Downslope movement was by nepheloid layers and by gravity‐induced currents (turbidity currents?) whereas contour currents are considered the main dispersing and shaping agent active on the slope proper. No clear‐cut evidence indicating turbidites was perceived; however, they would be expected to be found west of the study area, on the abyssal plain where they are usually ponded.
Two subsurface composite sections of the Upper Cretaceous in Israel were studied, using species o... more Two subsurface composite sections of the Upper Cretaceous in Israel were studied, using species of agglutinated foraminifera as indicators for paleoceanographic conditions. The southern section in the Zin Valley includes the Menuha, Mishash and Ghareb formations. It consists of chalks with a high but variable content of organic matter, as well as phosphorites and cherts in the Campanian interval. The synchronous northern section, in the Shefela basin, is more uniformly calcareous, and the equivalent of the Mishash and Ghareb formations is known as the ‘En Zetim Formation. The southern section represents a restricted shelf environment, the northwestern section a somewhat deeper basin of the southeastern Tethys.
Tx Doc no.: Z, UA220.7, R299, no. 121. Funding provided by U.S. Dept. of Energy and National Scie... more Tx Doc no.: Z, UA220.7, R299, no. 121. Funding provided by U.S. Dept. of Energy and National Science Foundation. DE-AC97-80ET-46615 and EAR-7824081.
... Ellen R. Naiman (2), Amos Bein (3), Robert L. Folk. ... light 18 O of 2 attributed to the mar... more ... Ellen R. Naiman (2), Amos Bein (3), Robert L. Folk. ... light 18 O of 2 attributed to the marine brine (Bein and Land, 1982) is explained by the reversed dependence of 18 O on increased evaporation in highly saline brines (Gonfiantini, 1966; Sofer and Gat, 1972; Nadler and Magaritz ...
Page 1. FLUID INCLUSIONS IN BEDDED PERMIAN HALITE, PALO DURO BASIN, TEXAS: EVIDENCE FOR MODIFICAT... more Page 1. FLUID INCLUSIONS IN BEDDED PERMIAN HALITE, PALO DURO BASIN, TEXAS: EVIDENCE FOR MODIFICATION OF SEAWATER IN EVAPORITE BRINE-POOLS AND SUBSEQUENT EARLY DIAGENESIS 1 ... 1978) are absent in the Pale Duro Basin halites. ...
... The attitude of the magnetic contours to the Dead 3$ ~2J0 `IN 2/J ^N ~ vO 'z goo R...IIA... more ... The attitude of the magnetic contours to the Dead 3$ ~2J0 `IN 2/J ^N ~ vO 'z goo R...IIAl l (;ZA'~ ~h'l SINAI e'~ 2100 io 7 lem Hel -JA 2300 34 132 e' ~99~ ~-1900_ - a 35 --a 31 Fig. 1. A part of the aeromagnetic map of Israel, modified after Folkman and Yuval [5]. Contour interval ...
Upper Cretaceous organic-rich carbonates in Israel contain benthonic foraminifera and varying amo... more Upper Cretaceous organic-rich carbonates in Israel contain benthonic foraminifera and varying amounts of early diagenetic infilling of sparry calcite. The sparry calcite has oxygen-isotope values (down to -9.50/00 PDB) that are significantly lower than those of the coexisting skeletal calcite (averaging -20/00 PDB). Low delta18O values are very common in carbonates that are associated with organic matter. These occurrences are
Abstract Kerogen and humic acid extracted from Eocene chalks and cherts display composition varia... more Abstract Kerogen and humic acid extracted from Eocene chalks and cherts display composition variations which do not follow normal thermal maturation trends. Decrease in the H/C ratio is followed by an increase of the O/C, S/C and N/C ratios; and the 12 C is also enriched. The humic acids are always heavier in their δ 13 C composition than the kerogens extracted from the same samples, their H/C, O/C and S/C ratios are usually higher and their structure is more aliphatic and less aromatic. The compositional trends observed in the humic acids and kerogens apparently result mostly from increased microbial oxidation of aliphatic chains into carboxyl groups by sulfate-reducing bacteria. This process is corroborated by infrared spectra which reveal a negative correlation between aliphatic and oxygen-containing groups, coinciding with the negative H/C-O/C relationship. The change from humic acids to kerogen, on the other hand, is the result of thermal maturation accompanied by microbial oxidation. Since the chert and chalk samples reflect the same evolution trends it appears that the microbial oxidation affected the organic matter prior to chertification.
... FRESHWATER CONTRIBUTION TO THE THERMAL WATERS OF THE NORTHERN JORDAN RIFT VALLEY, ISRAEL ARNO... more ... FRESHWATER CONTRIBUTION TO THE THERMAL WATERS OF THE NORTHERN JORDAN RIFT VALLEY, ISRAEL ARNON ARAD and AMOS BEIN Geological ... assumed that all the silica was derived from quartz dissolution (as maintained by Fournier and Rowe, 1966) and ...
ABSTRACTThe Cretaceous (Albian‐Turonian) Talme Yafe Formation is a huge prismshaped accumulation ... more ABSTRACTThe Cretaceous (Albian‐Turonian) Talme Yafe Formation is a huge prismshaped accumulation (more than 3000 m thick, about 20 km wide, and at least 150 km long) of calcareous detritus at the northwest continental margin of the Arabian Craton (Israel). Its sources of clastic material are biochemical carbonates and skeletal fragments derived from rudistid reefs deposited on the wide epicontinental platform located east of the accumulation site. Transport of the material from the shelf platform over the edge onto the slope was probably done by storms and by tidal and seasonal currents. Downslope movement was by nepheloid layers and by gravity‐induced currents (turbidity currents?) whereas contour currents are considered the main dispersing and shaping agent active on the slope proper. No clear‐cut evidence indicating turbidites was perceived; however, they would be expected to be found west of the study area, on the abyssal plain where they are usually ponded.
Two subsurface composite sections of the Upper Cretaceous in Israel were studied, using species o... more Two subsurface composite sections of the Upper Cretaceous in Israel were studied, using species of agglutinated foraminifera as indicators for paleoceanographic conditions. The southern section in the Zin Valley includes the Menuha, Mishash and Ghareb formations. It consists of chalks with a high but variable content of organic matter, as well as phosphorites and cherts in the Campanian interval. The synchronous northern section, in the Shefela basin, is more uniformly calcareous, and the equivalent of the Mishash and Ghareb formations is known as the ‘En Zetim Formation. The southern section represents a restricted shelf environment, the northwestern section a somewhat deeper basin of the southeastern Tethys.
Tx Doc no.: Z, UA220.7, R299, no. 121. Funding provided by U.S. Dept. of Energy and National Scie... more Tx Doc no.: Z, UA220.7, R299, no. 121. Funding provided by U.S. Dept. of Energy and National Science Foundation. DE-AC97-80ET-46615 and EAR-7824081.
... Ellen R. Naiman (2), Amos Bein (3), Robert L. Folk. ... light 18 O of 2 attributed to the mar... more ... Ellen R. Naiman (2), Amos Bein (3), Robert L. Folk. ... light 18 O of 2 attributed to the marine brine (Bein and Land, 1982) is explained by the reversed dependence of 18 O on increased evaporation in highly saline brines (Gonfiantini, 1966; Sofer and Gat, 1972; Nadler and Magaritz ...
Page 1. FLUID INCLUSIONS IN BEDDED PERMIAN HALITE, PALO DURO BASIN, TEXAS: EVIDENCE FOR MODIFICAT... more Page 1. FLUID INCLUSIONS IN BEDDED PERMIAN HALITE, PALO DURO BASIN, TEXAS: EVIDENCE FOR MODIFICATION OF SEAWATER IN EVAPORITE BRINE-POOLS AND SUBSEQUENT EARLY DIAGENESIS 1 ... 1978) are absent in the Pale Duro Basin halites. ...
... The attitude of the magnetic contours to the Dead 3$ ~2J0 `IN 2/J ^N ~ vO 'z goo R...IIA... more ... The attitude of the magnetic contours to the Dead 3$ ~2J0 `IN 2/J ^N ~ vO 'z goo R...IIAl l (;ZA'~ ~h'l SINAI e'~ 2100 io 7 lem Hel -JA 2300 34 132 e' ~99~ ~-1900_ - a 35 --a 31 Fig. 1. A part of the aeromagnetic map of Israel, modified after Folkman and Yuval [5]. Contour interval ...
Upper Cretaceous organic-rich carbonates in Israel contain benthonic foraminifera and varying amo... more Upper Cretaceous organic-rich carbonates in Israel contain benthonic foraminifera and varying amounts of early diagenetic infilling of sparry calcite. The sparry calcite has oxygen-isotope values (down to -9.50/00 PDB) that are significantly lower than those of the coexisting skeletal calcite (averaging -20/00 PDB). Low delta18O values are very common in carbonates that are associated with organic matter. These occurrences are
Abstract Kerogen and humic acid extracted from Eocene chalks and cherts display composition varia... more Abstract Kerogen and humic acid extracted from Eocene chalks and cherts display composition variations which do not follow normal thermal maturation trends. Decrease in the H/C ratio is followed by an increase of the O/C, S/C and N/C ratios; and the 12 C is also enriched. The humic acids are always heavier in their δ 13 C composition than the kerogens extracted from the same samples, their H/C, O/C and S/C ratios are usually higher and their structure is more aliphatic and less aromatic. The compositional trends observed in the humic acids and kerogens apparently result mostly from increased microbial oxidation of aliphatic chains into carboxyl groups by sulfate-reducing bacteria. This process is corroborated by infrared spectra which reveal a negative correlation between aliphatic and oxygen-containing groups, coinciding with the negative H/C-O/C relationship. The change from humic acids to kerogen, on the other hand, is the result of thermal maturation accompanied by microbial oxidation. Since the chert and chalk samples reflect the same evolution trends it appears that the microbial oxidation affected the organic matter prior to chertification.
... FRESHWATER CONTRIBUTION TO THE THERMAL WATERS OF THE NORTHERN JORDAN RIFT VALLEY, ISRAEL ARNO... more ... FRESHWATER CONTRIBUTION TO THE THERMAL WATERS OF THE NORTHERN JORDAN RIFT VALLEY, ISRAEL ARNON ARAD and AMOS BEIN Geological ... assumed that all the silica was derived from quartz dissolution (as maintained by Fournier and Rowe, 1966) and ...
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