2012

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Тезисы международной конференции

Рудный потенциал щелочного, кимберлитового

 и карбонатитового магматизма

Abstracts of International conference

Ore potential of alkaline, kimberlite

and carbonatite magmatism

STUDY OF THE GRAVITY DATA OF SOUTH OF TAL AFAR AND MOSUL CITY – NE IRAQ

Ezzadin N. Baban

Dept. of geology, Faculty of science, University of Sulaimani, Iraqi Kurdistan Region.

 

To analysis and interpretation the Bouguer anomaly map of south Mosul and Tal Afar area studied to delineate the subsurface structures. After the gridding the Bouguer anomaly data, several analytical methods of regional- residual separation are used such as, Griffin method, moving average and inverse distance methods.

Regional and residual maps were constructed. Most of the regional anomaly maps shows large and regional high and low anomalies. These large and wide anomalies may be reflected a high and low blocks within Basement rocks and extended into sedimentary rocks such as Mosul block. These blocks bounded by several deep faults having NW-SE, E-W and NW-SE trend.

Several small scale (shallow) positive anomalies are detected which may be reflected the effect of the subsurface anticlines within the sedimentary cover trending NW-SE, E-W and NE-SW. These anticlines occurred during Najd and Hejaz orogeny (NE-SW trend) and Alpine orogeny (NW-SE and E-W, “Zagros and Torus trend”). Also, several small scale negative anomalies are detected on residual maps which may be reflected the effect of subsurface synclines within the sedimentary cover having the same trends of anticlines such as NW-SW, E-W and NE-SW.

Several assumed Fault locations are referred on residual and second vertical derivative maps too. Most of them having NW-SE trend (Zagros trend). Also there are E-W (Torus trend) and NE-SW (Najd and Hejaz trend). These faults are having different lengths. Some of them which are occur within sedimentary rocks, extending into Basement rocks too.

Finally by using Wollard, 1962 equation, the depth of Moho discontinuity (thickness of crust) map constructed. It is appear that the depth of Moho ranges 33-35km in the area.