Revision of the Mineral Occurrence Documentation System (MODS) Database, with the Collaboration of the Exploration Team: Kingdom of Saudi Arabia

SGS-OF-2010-14 Abdullah Jehani, Mohammed Al Shanti, and Mustafa Makki
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ABSTRACT
The Saudi Geological Survey (SGS) is responsible for maintaining a national database for mineral occurrences and deposits in the Kingdom. The SGS has compiled information related to the occurrence of commodities, geologic setting, geochemical and analytic data in digital format that can be accessed by authorized users and incorporated into GIS applications.  Before the beginning of the present project, the previous Mineral Occurrences Documentation System (MODS) file contained more than 5000 entries.  A considerable number of them referred to occurrences of significant volume and potential and contained important information required for making metallogenic modeling and exploration planning.  Unfortunately, many other entries referred to insignificant mineralization and shows. They are of less interest and are likely to be neglected in future exploration programs. Therefore it was decided to rationalize the MODS, quadrangle by quadrangle, over an extended period from 2005 until the present. This project attempted to obtain a more accurate data file that characterizes significant both metallic and non-metallic mineral occurrences.  The project was implemented in successive stages comprising field data collection by the team members and office interpretation. The field data collected was restricted to measuring the coordinates for all the mineral deposits using GPS instruments and occurrences of both metallic and non-metallic minerals. The interpretations in the office aimed at grouping the MODS data that were previously given for the same deposit or occurrence and also removing duplicate names caused by translation errors by foreign geologists and hence establishing the correct name. The present project includes numerous schematic diagrams that reveal the quantity and the development of the collected data.  Intensive efforts were spent over several years to sort, reduce, filter, arrange and manage the data. The studies, information, analyses, measurements and interpretations are closely connected to the nature of mineralization in both metallic and non-metallic mineral occurrences. These information comprises bibliographic references, geological setting, country rock and host mineralization, structural factors controlling mineralization, geochemistry of mineralization, style of mineralization, alteration process, commodities assemblage and the ancient workings for each mineral occurrence in the Kingdom.

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Al Jehani, A.M., Al Shanti, M., and Makki M.A., 2011, Revision of the Mineral Occurrence Documentation System (MODS) database, With the collaboration of the Exploration Team, Kingdom of Saudi Arabia: Saudi Geological Survey Open-File Report SGS-OF-2010-14, 28 p., 20 figs. 5 tables, 6 apps, 2 pls.