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Location: 22 km W from El Peñon, Argentina
Level 5, 126 Phillip StreetSydneyNew South Wales, Austria2000
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The known sediments within the salar consist of salt/halite, clay, sand and silt horizons, accumulated in the salar from terrestrial sedimentation and evaporation of brines. Brines within the Salt Lake are formed by solar concentration, interpreted to be combined with warm geothermal fluids, with brines hosted within sedimentary units. Geology was recorded during the diamond drilling and from chip samples in rotary drill holes.The Salar de Carachi Pampa is located within a large hinterland water catchment that focuses water flows into the closed drainage intermontane Carachi Pampa basin of about 9,500 km2. In particular, it drains the lithium bearing volcanic rocks of Cerro Galan volcano and associated hot springs, which is also interpreted to be the source of lithium for the Livent’s Fenix lithium brine project production at Salar de Hombre Muerto, about 110 km north of Kachi. The Carachi Pampa basin is bounded to the east and west by NNE-SSW trending mountain ranges that have been raised by reverse faults to expose a basement sequence of rocks that rise to an elevation of 5,100 metres. The ranges are formed from Ordovician Falda Cienaga Formation comprising green-grey turbidites in outcrop, Permian Pataquia Formation, a red-bed sedimentary unit, and beige-green Eocene-aged Geste Formation of continental fluvial sediments.The Carachi Pampa salt lake is rhomboidal in shape with a NW-SE long-axis, and covers a known surface area of about 135 km2. A Pliocene basaltic shield volcanic cone overlies the basin infill sediments with lave flow, scoria, and air fall basaltic debris, creating a veneer over the sediments and covering an area of approximately 70 km2.To the south of the salar, ignimbrites, and unconsolidated pyroclastic sediments of the Cerro Blanco Pyroclastic Complex are thought to partially cover brine-saturated basinal sediments.
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