The Stone Source of Predynastic Basalt Vessels: Mineralogical Evidence for Quarries in Northern Egypt

1999 ◽  
Vol 26 (10) ◽  
pp. 1261-1272 ◽  
Author(s):  
Leanne M Mallory-Greenough ◽  
John D Greenough ◽  
J.Victor Owen
Keyword(s):  
Northern Egypt ◽  
Basalt Vessels ◽  
Mineralogical Evidence

Detection and molecular identification of Blastocystis isolates from humans and cattle in northern Egypt

2021 ◽  
Author(s):  
Sarah Mohamed Abdo ◽  
Hosny El-Adawy ◽  
Hoda Fahmy Farag ◽  
Hend Aly El-Taweel ◽  
Heba Elhadad ◽  
...  
Keyword(s):  
Molecular Identification ◽  
Northern Egypt

Sero-epidemiological studies on Q fever in sheep and goats in northern Egypt

2021 ◽  
Vol 70 (2) ◽  
pp. 98
Author(s):  
Emad Hegazy ◽  
Abd Mahmoud ◽  
Adel Khadr ◽  
Amir Rahman ◽  
Osama Abbas
Keyword(s):  
Q Fever ◽  
Epidemiological Studies ◽  
Sheep And Goats ◽  
Northern Egypt

Low temperature fluid alteration of oceanic layer 2 basalts, DSDP Leg 37

1977 ◽  
Vol 14 (4) ◽  
pp. 911-926 ◽  
Author(s):  
A. J. Andrews
Keyword(s):  
Low Temperature ◽  
Chemical Nature ◽  
Sea Water ◽  
Significant Rise ◽  
Secondary Phases ◽  
Acoustic Basement ◽  
Layer 2 ◽  
Fluid Alteration ◽  
Fluid Interaction ◽  
Mineralogical Evidence

Penetration of cold seawater into layer 2 of the oceanic crust occurs to at least 600 m, the maximum depth drilled below the sediment-acoustic basement boundary during Leg 37 of the DSDP. The main alteration phases are Mg-saponite, Fe-K rich celadonite, phillipsite, calcite, and hematite. The only exception to this occurs in the form of intensely hydrothermally altered gabbro breccias from an intrusive complex at site 334. There is no mineralogical evidence to suggest an increase in metamorphic grade with depth; however, a variation in mineralogy and alteration intensity, occurs as a function of structure, permeability, and the chemical nature of rock-fluid interaction. On this basis three types of alteration are defined as follows: (A) fracture focussed, oxidative; (B) palagonitic; and (C) non-oxidative, pervasive.Electron microprobe analyses reveal that alteration of fresh glass to palagonite involves the addition of H2O, an increase in total Fe, K2O, TiO2, and possibly SiO2, and the loss of CaO, MgO, Na2O, and MnO.Detailed examination of the mineralogy and chemistry of oxidative alteration suggests that during low temperature sea water–basalt interaction, basalt experiences a net gain in CaO, total Fe and K2O, while SiO2 and MgO appear to have been locally remobilized. These trends are generally consistent with the distribution of secondary phases. The distributions of Mn, Cu, Ni, Zn, Co, and Sr do not appear to have been significantly affected during this process.It is apparent that seawater must have experienced significant Eh lowering during this interaction; however, the occurrence of hematite–magnetite and absence of sulphide in this particular environment requires that seawater was either highly depleted in total sulfur or experienced a significant rise in pH.

Chemical and mineralogical evidence of the occurrence of mantle metasomatism by carbonate-rich melts in an oceanic environment (Santiago Island, Cape Verde)

2009 ◽  
Vol 99 (1-2) ◽  
pp. 43-65 ◽  
Author(s):  
Sofia Martins ◽  
João Mata ◽  
José Munhá ◽  
Maria Hermínia Mendes ◽  
Claude Maerschalk ◽  
...  
Keyword(s):  
Mantle Metasomatism ◽  
Cape Verde ◽  
Santiago Island ◽  
Mineralogical Evidence

The Relationship between the Monks of Northern Egypt and the Patriarchs of the Egyptian Church

2017 ◽  
Author(s):  
David Brakke
Keyword(s):  
The North ◽  
Northern Egypt ◽  
The Relationship

This chapter surveys how bishops Athanasius, Theophilus, and Cyril interacted with the monks of northern Egypt. Although at times Kellia, Nitria, or Scetis are discussed in particular, for the most part the chapter speaks generally of monks resident in the semi-eremitical communities of the north. It is often difficult to determine precisely where the monks that they name were located, and the settlements at Kellia often served as a subset or more withdrawn version of other communities in Nitria. Kellia in particular was most populous in the sixth and seventh centuries, but the discussions focus on the fourth and fifth centuries, when the relationship between the monks and the patriarch was first established. The most significant areas or themes of the interactions between these monks and the patriarchs were proper ascetic practice, appointment to the episcopate, and the promotion of orthodoxy and the suppression of heresy and paganism.

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