Regional Geology. The mineralisation at Duddar is associated with the Jurassic carbonate and clastic sediments in the Paleocene-Eocene collision zone between the Indian and the Iranian/Afghani plates. The Duddar area is of Loralai to Xxxxxx age and displays evidence of an extensional basin, likely developed during rifting and break up of Gondwanaland. Variable facies and debris flows indicate the onset of extensional rifting in the Duddar Member coinciding with the syn-diagenetic development of mineralisation. The stratigraphic sequences at Duddar are typified by rapid facies changes, with few internal consistent marker beds.
Regional Geology. The Saindak Cu-Au deposit is located in the Chagai District, Balochistan Province in the north-western corner of Pakistan. The Chagai calc-alkaline series Magmatic Belt is a well known, economically important geological belt hosting porphyry Cu deposits. The Chagai Belt runs about 480km along and inside the Pakistan border with Iran. The rock types of the Chagai Belt comprises mainly plutonic rocks; granodiorite, xxxxxxx diorite and quartz monzonite (granitewdiorite series). The mineralisation at Saindak is hosted by the Amalaf and Saindak sedimentary formations of Upper Cretaceous to Oligocene age. The Amalaf Formation is predominantly made up of siltstones, whilst the Saindak Formation is comprised of marls, volcanic agglomerates and andesitic tuffs. The tonalite stocks (quartz diorite porphyry) intrude the Amalaf sedimentary rocks.
Regional Geology. The following information was sourced from Golder, 2009.
Regional Geology. The south Eastern Rajasthan is one of the geologically important terrains where rocks of Archean of Upper Proteroxoic age are found. Archeans which are oldest rock formations are represented by rocks of Bhilwara Supergroup followed by Aravalli Supergroup of lower Proterozoic age and Delhi Supergroup of Lower to Middle Proterozoic age. The Upper Proterozoic Xxxxxx Igneous suite and Erinpura Granite follow the Delhi Supergroup rocks westwards. The generalized Geological Succession of south western Rajasthan is given below:
Regional Geology. The regional geology belongs to Vindhyan System derives its name from the Great Vindhyan Mountains, a part of which is found to form the prominent plateau – like range of sandstone to the north of the Narmada valley, particularly in Bundelkhand and Malwa. It occupies a large basin extending from Dehri-on-Sone to Hoshangabad and from Chittorgarh to Agra and Gwalior, surrounding the batholithic mass of Bundelkhand Granite. The upper Vindhyan are exposed in the Great Vindhyan Basin. They consist largely of sandstones and shale with sub-ordinate lime stones, the sandstones forming extensive plateaus around and to be the south of the Bundelkhand Granite mass. The sub-divisions are shown in the accompanying table. Super Group Group Formation Thickness (m) ------------------Unconformity-------------- Vindhyan Upper Vindhyan Bhander Upper Bhander SST. 270 Sirbu Shale 250 Chambal Lime Stone 20 Lower Bhander SST 30 Samaria Shale 30 Lower Bhander SST 70 Ganurgarh Shale 75 ----------Diamond- bearing Conglomerate---------- Rewa Upper rewa SST Jhiri shales Lower rewa SST Panna shales ----------Diamond- bearing Conglomerate---------- Kaimur Upper kaimur Lower kaimur Lower Vindhyan Semri Archaean Gwalior Group -----------------Unconformity-------------------
Regional Geology. A concise description of Geology is given by Geological Survey of India is given below: The stratigraphic sequence as given by Geological Survey of India is given below: Soils xxxxx xxxxx, younger alluvium Holocene Quaternary Older alluvium Pleistocene Agate conglomerate Pleistocene Tertiary Jhagadia formation Upper Miocene Kand formation Middle Miocene Xxxxxxxx formation Lower Miocene Nummulitive limestone Oligocene Deccan trap basalts with xxxxx Lower Eocene to upper cretaceous (Source: Geological Survey of India) Dahej GIDC is located on west of Bharuch at Gulf of Khambhat. Topographically, the area is almost flat with gentle slope toward west to southwest i.e. toward Gulf. Geologically, entire area is covered with recent age deposits of fluvial and marine origin. Major part of the study area is covered with xxxx to yellow colouredsilty loam. As per discussion with local people and well owners, depth to water level, within study area is 8 to 10 m and total depth of xxxxx ranging from 15 to 20 m. Owing to geological conditions, the Groundwater is salty and only used for general purpose. At some places, post monsoon water, shows slight improvement in terms of quality. However with passage of time it turns saline. Drinking water is supplied by tankers or pipe lines in most of the villages at vicinity of GIDC and SEZ area. Gujarat is categorized in the seismic zone III, which is classified as having a fairly high probability of earthquake shocks measuring 5 or 6 on the Xxxxxxx scale, low probability of shocks of 6 or 7 on the Xxxxxxx scale. Source: xxx.xxxxxxx.xxxxxxxxxx.xxx.xx Earthquake zoning map of Gujarat is shown as Figure 3-4.
Regional Geology. The project area is located partly in Deccan Trap province and partly in Precambrain terrain. The main Rock types of the area, belong to Peninsular Gnessic Complex (PGC) of Archean era Pakhal super group, Penganga and Sullavai group (Proterozoic), Gondwana sediments (Upper carboniferous to lower creataceous) and Deccan traps (Cretaceous to Paleocene). Peninsular Gnessic Complex (PGC) is represented by granite and granite gneiss, intruded by basic xxxxx and quartz veins. Older metamorphics like banded iron quartzite occurs within PGC. These are exposed around Adilabad and south of Utnur. Pakhal Super Group comprises a sequence of Dolomite, Limestone, Quartizites, Arkose and Shale. Penganga group comprises mainly of limestone, shales and sandstones. These meso and Neo proterozoic sediments having general trend of NW-SE direction unconfirmly overly the PGC or shows faulted contact. They are wide spread south of Penganga extending towards east. Some of the manganise deposits are located in the Penganga group. The Gondwana Super Group in the region are represented by Talchir, Barakar,, Barren measures, Kamthi, Maleri/Yerapalli/Bhimaram/Dharamaram, Kota and Gangapur/Chikiyala formations. These sediments are deposited in the Godavari Graben which extends from Asifabad east in the south direction and comprises of repeated cycles of conglomerate, Sandstone, Shale and Clay. These Gondwana Super Group of rocks have general trend of NW - SE direction. The Barakar formation in the region is host of Coal Seams. Regionally Deccan Traps also wide spread lying over Archaeans – Proterozoic and Gondwana rocks and represented by thick Amygdoloidal to massive Basalts flows with thin intertrapeans. They extend from Asifabad and Nirmal towards NW direction. NW-SE, N60E – S60W faults occur NW of Adilabad in penganga group. Enechelon faults are common in Gondwanda.NW-SE trending kadam fault is a major fault of the area running close to Boath village and cutting across Godavari river.
Regional Geology. It is made up of a sequence of Cenozoic volcanic rocks, resting on a basal sedimentary section of Mesozoic age, which in turn are intruded by igneous bodies associated with the East border of the Batholitic complex of Sinaloa. • The volcanic rocks belong to the two large subdivisions established informally to the Sierra Madre Occidental by XxXxxxxx and Xxxxxx (1977), which are the Lower Volcanic Complex and the Upper Volcanic Supergroup. • The upper volcanic complex is formed by felsic volcanic rocks, mainly by ignimbrites, tuffs, spills of rhyolitic composition. These rocks are found in most of the region forming the topographic highs and the thick folder of the Sierra Madre Occidental in the form of plateau, to this sequence is assigned an age of the Middle tertiary, ranging from 34 to 27 m.a. The igneous bodies ranging from granodiorites to quartz monzonites, tonalities, and diorites, the first being dominant, there is wide variation in the range of ages within the same region, but with a tendency to be more young to the East (Henry C.D., 1975).
Regional Geology. The Regional Geology of The Bharuch Districts Is Given Below: Cenozoic Quaternary Holocene Undifferentiated sediments/xxxx deposits Alluvial, fluvial sand Mesozoic- Cenozoic Cretaceoeocene Deccan trap Black Mesozoic upper cretaceous Lameta formation Bagh formation Sedimentary Rocks
Regional Geology. The regional geology of the Xxxxxxx Creek field has been detailed in many publications. Papers contained in AusIMM Monograph 14 (Geology of the Mineral Deposits of Australia and Papua New Guinea), Volume 1, pp. 829-861 provide a good introduction to the regional geology and styles of gold-copper mineralisation of the area. A more recent reference is the 1998 Northern Territory Geological Survey second edition geological map and explanatory notes on the Xxxxxxx Creek 1:250,000 sheet, which includes a revised stratigraphy.
