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Abstract
Exploration investigation with using GIS technology is a branch of this vast science. GIS prepare a data bank for a good access to Mineral deposit data and processing them for indicating the new exploration areas.
In additional, with usage of this system you can create sample location nets, drilling hole points and coring points and different geological sections in various scales:
With this method in primary, detail and semi detail exploration, you can access to the geological and mine data and processing data for reaching to the mine potential map for an element (or a group of elements) which can reduce budget and time and limit the area for exploration.
This study has two targets:
The first one is gathering preparing and processing data for a special explorations, and also form an application group of data .These data can be a base for preparing mining map in different scale such as 1:100,000 ,1:250,000 and province scale which can be used for zoning the exploration area and Economic geology maps.
The second target is scientific application for processing and interprcting data for getting promising area for a special element under an ore mineralisation modeling. During this method all of the effective data for ore mineralization in area digitize and inter to the computer system. The data dominately includes:
Geological, structural and geomorphology data, geophysical, geochemical and remote sensing data, economic geology (active and abandoned mines and indications), alteration zones and form of intrusive bodies and etc.
Then these data process and inter prate and according to the result, mine potential maps prepared and, promising area for metallic and none metallic element, indicate.
In this paper the mine potential map and final results of Shahr-e-Babak sheet with 1:100,000 scale is a sample for indicating of promising area as a GIS application in exploration .
Introduction
Geographic Information System (GIS) is a suitable place for considerable amount of data and simultaneous data processing. This system preparing the researchers particular possibilities for next processing .
In the current century, this technology has been caused considerable changes, in different sciences and technologies as well as in the research centers. Considering the capabilities of this new system, the world will wilness spectacular changes.Exploration investigation and defining promising areas is one of the applied branches of this system.
Here there is an example for this kind of study.
Fig.1: Mineral potential map for copper in Shahr-e-Babak area
Methodology
Mineral data is one of the most important information layers in exploration studies .Therefor creating a database for such kind of data is of great importante.In order to carry out exploration studies and defining promisingarea all geological ,geochemical ,gephyisical, remote sensing and the orther related data are needed.
The more we have information about the study area the better we are able to present a model for mineralisation in the area finding the mineral ore deposite.
Therefor, the base of exploration in this method is the complet ,correct and widespread information. The mineral potential map and target areas is one of the results of the data processing. The target areas are defined according to the exploration priorities, the high potential areas usually cover near 1% of study area. The percentage of mineralization probability is a number between 0-1.
If this number is nearer to one , there is more probability for mineralization in the area. There is no limitation for entering the other information layers in this method, and any of the layers which is more related and effective can be used.
Shahr-e-Babak is a case study for this method. This sheet located in Kerman province (central of Iran ) the weather in this area is hot in summer and cold in winter warer sourses are rivers, drinages and springs. This sheet is a part of Uromieh-Dokhtar magmatic belt. Position of this zone is North west -South east, and is included volcanic and volcano sedimentry and plotonic rocks.
Fig.2: Results of chemical analyses for copper in Shahr-e-Babak area
Data layers are including
Geology , Geomorphology , Intrusive bodies , Alterasion, Hammer exploration , Geochemical, Aeromagnetic ,Remote sensing and Faults data.
All these data processed and then can be shown as the evidence maps.The evidence maps can be prepared in two forms: 1.binary 2.multi class.
In this case study, binary class has been used. In addation, there are different methods for final results.From which Weights of Evidence and Fuzzy logic can be named.
We have tried to use these two methods for this case study.Following preparation binary maps, these maps are processed and compiled and the result of which is mineral potential map for copper in Shahr-e-Babak sheet which show the posterior probility for this element exploration. ( fig.1 )
Using of Geographic Information System in mineral exploration ,is a favorable way for study of immense amount of data which can reduce budget and time and limit the area for exploration and get better results for experts.
In study of Shahr-e-Babak sheet ,the most important aim was knowledge of new areas for two kinds of copper mineralization. ( vien form and porphyry )
Therefor data processing do in two level and join to gether.The results for copper mineralization ,are presented in six areas that cover near the 15 Km2 of this 1:100,000 sheet.
Results of sample analyses and field studies show there are the economic parts in this case study that it is proposed for detail and semidetail studies in the future. ( fig.2 )
Refrence
GIS in exploration with special viewpoint to mineral potential and definding the exploration priority maps
Mana Rahimi
GIS group- Geomatics department, Geological Survey of Iran
PO.Box:13185-1494, Tehran - IRAN
mana_r@yahoo.com
Mana Rahimi
GIS group- Geomatics department, Geological Survey of Iran
PO.Box:13185-1494, Tehran - IRAN
mana_r@yahoo.com
Abstract
Exploration investigation with using GIS technology is a branch of this vast science. GIS prepare a data bank for a good access to Mineral deposit data and processing them for indicating the new exploration areas.
In additional, with usage of this system you can create sample location nets, drilling hole points and coring points and different geological sections in various scales:
With this method in primary, detail and semi detail exploration, you can access to the geological and mine data and processing data for reaching to the mine potential map for an element (or a group of elements) which can reduce budget and time and limit the area for exploration.
This study has two targets:
The first one is gathering preparing and processing data for a special explorations, and also form an application group of data .These data can be a base for preparing mining map in different scale such as 1:100,000 ,1:250,000 and province scale which can be used for zoning the exploration area and Economic geology maps.
The second target is scientific application for processing and interprcting data for getting promising area for a special element under an ore mineralisation modeling. During this method all of the effective data for ore mineralization in area digitize and inter to the computer system. The data dominately includes:
Geological, structural and geomorphology data, geophysical, geochemical and remote sensing data, economic geology (active and abandoned mines and indications), alteration zones and form of intrusive bodies and etc.
Then these data process and inter prate and according to the result, mine potential maps prepared and, promising area for metallic and none metallic element, indicate.
In this paper the mine potential map and final results of Shahr-e-Babak sheet with 1:100,000 scale is a sample for indicating of promising area as a GIS application in exploration .
Introduction
Geographic Information System (GIS) is a suitable place for considerable amount of data and simultaneous data processing. This system preparing the researchers particular possibilities for next processing .
In the current century, this technology has been caused considerable changes, in different sciences and technologies as well as in the research centers. Considering the capabilities of this new system, the world will wilness spectacular changes.Exploration investigation and defining promising areas is one of the applied branches of this system.
Here there is an example for this kind of study.
Fig.1: Mineral potential map for copper in Shahr-e-Babak area
Methodology
Mineral data is one of the most important information layers in exploration studies .Therefor creating a database for such kind of data is of great importante.In order to carry out exploration studies and defining promisingarea all geological ,geochemical ,gephyisical, remote sensing and the orther related data are needed.
The more we have information about the study area the better we are able to present a model for mineralisation in the area finding the mineral ore deposite.
Therefor, the base of exploration in this method is the complet ,correct and widespread information. The mineral potential map and target areas is one of the results of the data processing. The target areas are defined according to the exploration priorities, the high potential areas usually cover near 1% of study area. The percentage of mineralization probability is a number between 0-1.
If this number is nearer to one , there is more probability for mineralization in the area. There is no limitation for entering the other information layers in this method, and any of the layers which is more related and effective can be used.
Shahr-e-Babak is a case study for this method. This sheet located in Kerman province (central of Iran ) the weather in this area is hot in summer and cold in winter warer sourses are rivers, drinages and springs. This sheet is a part of Uromieh-Dokhtar magmatic belt. Position of this zone is North west -South east, and is included volcanic and volcano sedimentry and plotonic rocks.
Fig.2: Results of chemical analyses for copper in Shahr-e-Babak area
Data layers are including
Geology , Geomorphology , Intrusive bodies , Alterasion, Hammer exploration , Geochemical, Aeromagnetic ,Remote sensing and Faults data.
All these data processed and then can be shown as the evidence maps.The evidence maps can be prepared in two forms: 1.binary 2.multi class.
In this case study, binary class has been used. In addation, there are different methods for final results.From which Weights of Evidence and Fuzzy logic can be named.
We have tried to use these two methods for this case study.Following preparation binary maps, these maps are processed and compiled and the result of which is mineral potential map for copper in Shahr-e-Babak sheet which show the posterior probility for this element exploration. ( fig.1 )
Using of Geographic Information System in mineral exploration ,is a favorable way for study of immense amount of data which can reduce budget and time and limit the area for exploration and get better results for experts.
In study of Shahr-e-Babak sheet ,the most important aim was knowledge of new areas for two kinds of copper mineralization. ( vien form and porphyry )
Therefor data processing do in two level and join to gether.The results for copper mineralization ,are presented in six areas that cover near the 15 Km2 of this 1:100,000 sheet.
Results of sample analyses and field studies show there are the economic parts in this case study that it is proposed for detail and semidetail studies in the future. ( fig.2 )
Refrence
- Esfehani nejad, M. & Rahimi, M. 2000, Preparation of mineral potential map in Shahr-e-Babak sheet with using G.I.S, Geological Survey of Iran.
- Vaezi pour, M.J. 1999, Exploration project in Uromie-Dokhtar belt (Shahr-e-Babak sheet , Scale 1:100,000), Geological Survey of Iran.
- Geological map of Shahr-e-Babak ( Scale 1:100,000 ) ,1971, Geology and mineral Exploration institude of Yogoslavia.
- Abedian, N. 1998, Hammer exploration in Shahr-e-Babak geological sheet, Geological Survey of Iran.
- Bohnam-Carter, G.F. 1994, Geographic Information Systems for geoscientists. Modelling with GIS, Pergamon, Oxford, 398 P.