Heavy mineral (HM) deposits associated with sediments in basins and paleovalleys are known in many places around the world. HM sands have two main deposit styles: (paleo-)shoreline/marine placers commonly associated with beach (including barrier and aeolian coastal dune) or shallow offshore deposits, and …

Eolian sand deposits cover ~20% of the world's drylands and have been shown to be linked with and record substantial changes in terrestrial environments 1.The instigation of eolian activity in ...

Introduction. Extensive, late Quaternary deposits of loess and eolian sand occur across central Argentina and are important archives of hydrologic variability, distal to seasonal effects of the South American Monsoon (Clapperton, 1993, Iriondo and Kröhling, 1995, Zárate, 2003, Zárate, 2007, Rutter et al., 2012, Forman et al., 2014).

Eolian deposits are common in the western Pampas of Argentina, and most are assumed to be associated with glacial conditions. Stratigraphic and sedimentologic studies coupled with OSL dating in San Luis Province document for the first time a nearly continuous sequence of eolian sand sheet deposits that span most of the Holocene. …

To assess the provenance of eolian sand in diverse dune fields, the obtained results are compared with detrital modes of 40 sand samples collected from active bars …

Argentina Looks for Frac Sand to Reduce Shale Drilling . Argentina is now looking to follow in the footsteps of the US by cashing in on the country's Vaca Muerta shale oil and gas deposit (among others), but up until recently, obtaining Argentina Frac Sand Market Outlook The Argentina frac sand market size is expected to grow at a CAGR of 10.20% …

YPF was the most active with 382 stages, trailed by Vista Oil & Gas with 111, Argentina's Tecpetrol 39, Pluspetrol 31 and BP-Pan American Energy with 24 The lockdown for the pandemic had cut ...

In the case of IIa and IIIa, the toe deposits are similar; but their matrix percentage decreases to 30%. They are composed of fine pebble clasts ranging from 2 to 5 cm across, with sand in the interclast spaces. The IIa deposit thickness is 16 m, whereas the IIIa deposits are up to 10 m thick.

Introduction. Eolian sand deposits cover ~20% of the world's drylands and have been shown to be linked with and record substantial changes in terrestrial …

Sand pipes and clastic dikes in Miocene eolian and fluvial deposits of NW Argentina. Sand pipes are cylindrical subvertical and widen upward to form an inverted …

The fluvial-aeolian interaction field of the Guandacol valley (northwest Argentina) is studied through different methodologies that comprise satellite, drone and GPR images, bedform descriptions, and grain-size analysis. The obtained information allowed the recognition of five depositional subenvironments: 1. Dune patches; 2. Aeolian …

Los Molles section. The section shows delta front deposits (FA 8), overlain by lower delta plain deposits (FA 6 and FA 7) and upper delta plain deposits (FA 4), forming a shallowing-upward trend.

Lithium brine deposits represent about 66 percent of global lithium resources and are found mainly in the salt flats of Chile, Argentina, China and Tibet. 1. Lithium brine deposits: Continental

The largest one. The Metalliferous Ore Deposits of Chile and Argentina, and Their Geologic Framework 69. (El Sauce, 32°52'S) has about 5 mio t of ore, but most deposits have an average of 0.5 mio t (and grades between 1.5 and 3.00Jo Cu).

Hyperpycnal currents are river‐derived turbidity currents capable of transporting significant volumes of sediment from the shoreline onto the shelf and potentially further to deep ocean basins. However, their capacity to deposit sand bodies on the continental shelf is poorly understood. Shelf hyperpycnites remain an overlooked …

In part of this region, the sandy deposits overly buried soils (i.e. Thapto-sols). The action of wind gave way to the development of sand dunes, whose orientation is dictated by the direction of the prevailing winds. Lowlands between dunes are covered by hydromorphic and salt-affected soils (INTA 2017).

The aim of this paper is to describe and interpret clastic injectites structures recognized in the eolian deposits of the Tin Tin Member of the Angastaco Formation (Oligocene to Middle Miocene). The Angastaco Formation is part of the Andean foreland basin sedimentation in the Eastern Cordillera of northwestern Argentina. The structures …

The Argentina frac sand market is on a trajectory of unprecedented growth, underpinned by its indispensable role in the energy sector. Frac sand, a specialized type …

Argentina is now looking to follow in the footsteps of the US by cashing in on the country's Vaca Muerta shale oil and gas deposit (among …

Subtypes by organization: (1) Bedforms (1.1) Dune (1.2) Ripple (1.3) Megaripple (2) Sand sheet (3) Drift deposits (Greeley et al. 2002). Subtypes by Deposit Hierarchy. Sand systems are self-organized into a hierarchy of superimposed sand patterns (bedforms) (Lancaster 1995).These forms are in a state of quasi equilibrium state; they …

Eolian deposits are common in the western Pampas of Argentina, and most are assumed to be associated with glacial conditions. Stratigraphic and sedimentologic studies coupled with OSL dating in San Luis Province document for the first time a nearly continuous sequence of eolian sand sheet deposits that span most of the Holocene.

The Late Jurassic chert deposits of the Bahía Laura Group in the Deseado Massif of Santa Cruz Province, southern Patagonia, Argentina bear exceptionally wellpreserved organisms in hot-spring ...

The results show that the average diffusive methane emissions from Alberta's oil sands formations is 1.56 × 10 -4 kg/m 2 /year at the 90th percentile of cumulative probability. The results also indicate an annual diffusive methane emissions rate of 0.857 ± 0.013 Million tons of CO 2 e/year (MtCO 2 e/year) from Alberta's oil sands …

Alves and Cartwright (2009) and Alves (2010) described an MTD from offshore Brazil where the deposit was divided into three distinct zones according to the distribution and sizes of blocks: (a) proximal deposits, with blocks as large as 7.5 km interpreted as mostly composed of remnant or 'in situ' blocks that comprise 0.3 to 0.4 of ...

Most of the Buenos Aires coastline is composed of sand, although some beaches are composed of mixed sand and gravel. These beaches vary spatially and …

The Pleistocene–Holocene history of aeolian transport and deposition on the Argentine Pampas is recorded by ~700,000 km 2 of aeolian sand and loess between ~30°–39° S latitude (Fig. 1) 13 ...

Sand sheet deposits are ubiquitous in western Pampas, San Luis Province, Argentina. Sedimentology and OSL ages indicate nearly continuous ~ 12–1 ka eolian …

Palynological analysis of sandy hyperpycnal deposits of the Middle Jurassic, Lajas Formation, Neuquén Basin, Argentina ... The Neuquén Basin is a back-arc basin located in western central Argentina, shaping the end of a series of marine sedimentary basins located close to the western margin of Gondwana during the Mesozoic (Mpodozis …

The discovery of Cp. dimartinoi is consistent with the record of paleoburrows in aeolian deposits from the upper Miocene of Río Negro Province (Argentina) assigned to fairy armadillos (Melchor et ...

Technological developments in processing Australian mineral sand deposits. February 2020. Journal of the Southern African Institute of Mining and Metallurgy 120 (2) DOI: 10.17159/2411-9717/881 ...

They also occur as rafts to sand-sized clasts in most breccias. ... and Heinrich, C.A., 2001, Geology and alteration-geochemistry of the Bajo de la Alumbrera porphyry Cu-Au deposit, Argentina: ECONOMIC GEOLOGY, v. 96, p. 1719–1742. Ulrich, T., Günther, D., and Heinrich, C.A., 1999, Gold concentrations of magmatic brines and the metal budget ...

The possible producer and environmental setting of large meniscate burrows (Nagtuichnus meuleni igen. and isp. nov.) occurring in late Miocene and Holocene aeolian deposits from Argentina are discussed.These are unbranched burrows with an uniform meniscate filling that range in width from 46 to 78 mm. N. meuleni distinguishing features …

The sedimentary deposits of the lowlands are mainly unconsolidated clay, sand, and gravel of Quaternary age, poorly consolidated deposits of clay, sand, silt, limestone, and lignite of Tertiary age, and consolidated (to a limited extent) deposits of Cretaceous marl, chalk, limestone, sand, and gravel (see Geologic Map of Arkansas below).

Tonnages of these deposits are large and in several instances exceed a billion tons with grades between 2 and 12 percent total heavy minerals (THM). Deposit characteristics are influenced by continental tectonics, coastal morphology, sea level changes, tides, climate and the altered, eroded nature and composition of the provenance.

This uncertainty is due to the lack of detailed knowledge of the geological characterizations of the subsurface formations overlying the oil sand deposits. For example, an exact distribution for Alberta's oil sand depth over 140,000 km 2 surface area is not precisely characterized. The depth of oil sand formations can vary from the depth of ...

White sand dunes in the proximity of the town of Monte Hermoso, not too far from Necochea. The landscape is desertic despite the proximity to the sea, there are some areas with thick vegetation where sandboarding should be avoided. Coordinates of the dunes. GD: lat: -38.987968, lng: -61.337013. DMS: lat: -38º 59′ 16.69", lng: -61º 20 ...

9 Citations. Explore all metrics. Abstract. Sand dune quarries are a location of common aggregate mining activity developed in coastal areas, especially in the …

Eolian sand-sheet deposits The sand-sheets described in this paper are similar to those documented by Fryberger et al. (1979), although interdune sand sequences are also included here. The deposits are composed of fine and medium sandstones with a few mudstone intercalations; the main structures observed are planar bedding, horizontal …