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. Geologically, most of the part of the Bundi district is occupied by rocks of Vindhyan formation which forms the part of Great Vindhyan Basin extending from Xxxxxxx in Bihar to Chittorgarh area in Rajasthan. Rocks of Vindhyan range in the area area are divided into Lower Vindhyan and Upper Vindhyan. Lower Vindhyan comprises of Jahazpur and Upper Vindhyan include Kaimur, Rewa and Bhander groups. Lower Vindhyan i.e. Jahazpur is separated from Kaimur group by conglomerate horizon which marks the break in sedimentation before deposition of Kaimur i.e. unconformity. Kaimur, Rewa and Bhander Series of upper vindhyan are also separated from each other by unconformity. Jahazpur group of Lower Vindhyan is generally calcareous. Kaimur and Rewa is generally arenaceous while Bhander is arenaceous and calcareous in nature. General statigraphic succession of rock types exposed in Bundi district is as follows:
Regional Geology. Geologically, most of the part of the Bundi district is occupied by rocks of Vindhyan formation which forms the part of Great Vindhyan Basin extending from Xxxxxxx in Bihar to Chittorgarh area in Rajasthan. Rocks of Vindhyan range in the area area are divided into Xxxxx Xxxxxxxx xxx Xxxxx Xxxxxxxx. Xxxxx Xxxxxxxx comprises of Jahazpur and Upper Vindhyan include Kaimur, Rewa and Bhander groups. Lower Vindhyan i.e. Jahazpur is separated from Kaimur group by conglomerate horizon which marks the break in sedimentation before deposition of Kaimur i.e. unconformity. Kaimur, Rewa and Bhander Series of upper vindhyan are also separated from each other by unconformity. Jahazpur group of Lower Vindhyan is generally calcareous. Kaimur and Rewa is generally arenaceous while Bhander is arenaceous and calcareous in nature. General statigraphic succession of rock types exposed in Bundi district is as follows: Super groups Groups Formations Recent to sub recent -- Soil Alluvium Vindhyan Super Group Bhander series Sandstone, Limestone & Shale Rewa series Shale & Sandstone Kaimur series Shale & Sandstone ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Unconformity ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Jahazpur Dolomite, Phyllite & Quartzite Bhilwara Super Group Hindoli & Mangalwar Complex Shale, Slate/ Phyllite, Quartzite, Dolomites and limestone. Source: Modified and generalized lithographic sequence after G.S.I. (1981). The rocks of the area belong to the Lower Bhander group. Main rock type is lower Bhander sandstone (Bundi Hill sandstone) Structure No fault, fold or any geological disturbance is observed in the lease area. The general strike is in the NW to SE direction and dip is almost flat to gentle inclined, of sandstone beds.
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.
Regional Geology. The Regional Geology of The Bharuch Districts Is Given Below: Era Period Epoch Super group/formation Mineral/rock 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 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------------------- Bundelkhand Granite
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 following information was sourced from Golder, 2009.
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 quarry lease area constitute a part of Granite and Granitic Geneissic terrain of Archean age. Pink and Grey Coloured Granited, Pink Alkali- Feldspar Granites are the important litho units in the area. Xxxxx-Diorites with basic enclaves of Supra-Crystals like Horneblende Schists, Biotite Schists also occupy the area. These rock types are exhibiting various landforms like Domes,Inselbergs ,Castls-Koppies,Whalwbacks and Linear Ridges. The Geological succession of the area as worked out GSI(1991) is as follows: Recent Alluvium/Soil Cover Younger Quartz Veins, Pegmatites Dolerites.Gabbro.Pyroxenite Xxxxx Fine Grained Pink Alkali Feldspar Granite, Medium to Coarse Grained Pink Alkali Feldspar Granite Granite with Mega Crysts of K-Feldspar, Very coarse grained Pink Alkali Feldspar Granite with Mega Crysts of K-Feldspar,very coarse grained Pink Alkali Feldspar Granite Ptrcambrian Granitiod Migmatite Complex Medium to Coarse Grained Pink Granite Magmatite II Fine grained Grey Alkali Feldspar Granite Medium to Coarse Grained Grey Alkali Feldspar Granite Very Coarse-Grained Grey Alkali Feldspar Granite Migmatite I Xxxxx-Diorite
