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A-4. Geophysical maps of the Katawas Basin area, eastern Afghanistan showing location of the Chaman Fault (thick black line), Katawas gold area of interest, Katawas Basin, and Khost Ophiolite. Data from Sweeney and others (2006). (a) Aeromagnetic anomaly map reduced to pole. Small dots are villages. (b) First-derivative aeromagnetic map.
Source publication
The Katawas gold area of interest (AOI) lies along the northwestern margin of the Katawas
Basin in eastern Afghanistan. Although no known mineral occurrences or deposits are present in the
AOI, geologic and remote-sensing data suggest that the environment is conducive to the occurrence of
epithermal gold deposits. The Katawas AOI encompasses 1 of m...
Contexts in source publication
Context 1
... and others, 1973;others, 1974, 1975). The basin was studied and described by Mennessier (1968Mennessier ( , 1970a, Kaever (1964Kaever ( , 1967a, Ganss (1964aGanss ( , b, 1970, Bruggay (1973), Denikayev and others (1971), and Koshelev and others (1972). The Katawas Basin extends for 650 km (from south to north), and is as much as 160 km wide ( fig. 8A-4). The boundary between the basin and the Khost Ophiolite is obscure, but probably tectonic. The main geosynclinal complex is composed of 4,490-to 7,550-m-thick, flysch-like, and irregularly interbedded, deformed and faulted Oligocene sandstone, shale, and siltstone as well as local limestone and conglomerate. Mafic volcanic rocks are ...
Context 2
... the northwest and east by smectite on the lower slopes. Locally, there are also small zones of calcite and residual clays ( fig. 8A-12). These alteration assemblages lie along a northeast- striking linear zone which is likely to be above or adjacent to a small igneous body (figs. 8A-6a and b) or may be hosted in a splay of the Chaman Fault zone ( fig. 8A-4) separating two adjacent accreted terranes, along which such epithermal gold (and mercury) mineralization is common ( Groves and others, 2003). ...
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