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Geology and ore deposits of central Atacama Province, Chile

Kenneth Segerstrom
Geology and ore deposits of central Atacama Province, Chile
Geological Society of America Bulletin (1967) 78 (3): 305-318


Geologically, the central part of Atacama province straddles the north-striking intrusive contact between the Andean batholith of western Chile and the stratified rocks to the east. The layered sequence consists of lower Jurassic and lower Cretaceous marine sedimentary rocks and lavas, which are unconformably overlain by upper Cretaceous and Tertiary continental sedimentary rocks, tuffs, and lavas. A marked contact zone of skarn rocks and meta-andesite separates the diorite, granite, and related rocks of the batholith from the unmetamorphosed sedimentary and volcanic sequence. The sedimentary rocks have been folded into a major, north-northeast-trending, north-plunging anticlinorium in the middle of the area and into a doubly plunging synclinorium in the eastern part. The entire area is in the copper metallogenetic province, and parts of it are in the overlapping gold, silver, and iron provinces. At least seven of the 14 major types of hypogene ore deposits in Chile are represented in the central part of Atacama province. However, most of the production of metals has been from supergene ores, with the important exceptions of iron ore from the contact metamorphic zone and hypogene copper ore from near the deep valley of the Rio Copiapo. The discovery localities of five rare supergene minerals--remolinite, nantokite, copiapite, bordosite, and chanarcillite--are in the area.

ISSN: 0016-7606
EISSN: 1943-2674
Serial Title: Geological Society of America Bulletin
Serial Volume: 78
Serial Issue: 3
Title: Geology and ore deposits of central Atacama Province, Chile
Author(s): Segerstrom, Kenneth
Pages: 305-318
Published: 1967
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
Accession Number: 1967-004988
Categories: Economic geology of ore deposits
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. (incl. geol. sketch map)
S29°34'60" - S25°15'00", W71°30'00" - W68°15'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute.
Secondary Affiliation: Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
Update Code: 1967
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