Ages of Batholithic Intrusions of Northern and Central Chile

Ruíz, Carlos Fuentes; Aguirre, Luis; Corvalán, José Luis Muñoz; Rose, Harry J.; Segerstrom, Kenneth; Stern, T. W.

doi:10.1130/0016-7606(1961)72[1551:aobion]2.0.co;2

Cited by 53 publications

(4 citation statements)

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“…Basement I is exposed east of the Atacama fault zone and comprises the Upper Paleozoic metamorphic rocks intruded by granitic rocks with some compositional variance, but including diorite and granodiorite. Similar granitic rocks elsewhere in Chile are associated with Late Jurassic and Middle Cretaceous batholithic suites (Ruiz et al, 1961;Levi et aI, 1963). Bowes et al (1961) adopt a Middle Cretaceous age for these granitic rocks in the Taltal area, although no age determinations have been made on samples of this suite from the immediate region.…”

Section: Regional Geologymentioning

confidence: 81%

“…In Basement II, which crops out in the coastal area south of Taltal, the Upper Paleozoic metamorphic rocks are intruded primarily by light gray, medium-to coarse-grained, quartzose gra~fites and ademellites. These intrusive rocks are dated as definitely pre-Jurassic on the basis of stratigraphic arguments (F. Ortiz, personal communication; Ruiz et al, 1961) and as Paleozoic (340 ± 40 my; 280 ± 50 my) on the basis of lead-alpha radiometric dating (Levi et al, 1963). Perthitic feldspars, biotite and abundant quartz characterize these granitic rocks.…”

Section: Regional Geologymentioning

confidence: 99%

“…Triassic(?) conglomerates and felsic tufts and Lower Jurassic marine beds underlie the volcanic section in part; exposures can be seen along the western volcanic contact south of Taltal (Ruiz et al, 1961).…”

Section: Regional Geologymentioning

confidence: 99%

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Geologic structure of the Taltal Area, Northern Chile, in relation to the earthquake of December 28, 1966

Arabasz

1968

Bulletin of the Seismological Society of America

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The Taltal area, which lies within the coastal cordillera of northern Chile, is dominated by a group of major active faults that cut a eugeosynclinal section of predominantly Jurassic andesites overlying Paleozoic metamorphic and plutonic rocks and intruded by Late Mesozoic plutons. The Atacama fault, a suggested regional strike-slip fracture parallel to the coastline, has been obliquely cut and left-laterally offset 10 km by the Taltal fault, which passes through the town of Taltal. Three distinctive features were found to be consistently offset 10 km by the Taltal fault: the easternmost strand of the Atacama fault, an intrusive contact, and a unique volcanic unit. Former continuity of the Atacama fault through the Taltal region is proposed, and subsequent disruption by the Taltal fault appears to have caused major structural readjustments in the still-active Atacama fault zone. The tentative offshore epicenter and aftershock distribution of the December 28 earthquake are not directly correlative with faults that have been mapped in the nearby on-shore areas; this lack of correlation is not surprising in view of the suggested depths of hypocenters in the lower crust or upper mantle.

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Section: Regional Geologymentioning

confidence: 81%

Section: Regional Geologymentioning

confidence: 99%

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Geologic structure of the Taltal Area, Northern Chile, in relation to the earthquake of December 28, 1966

Arabasz

1968

Bulletin of the Seismological Society of America

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“…Part of one such mass is exposed at La Ligua and west of the Cretaceous contact. On the other hand, Ruiz andothers (1961, p. 1558) have suggested that there may have been epeirogenic uplift throughout central Chile during Late Jurassic time.…”

Section: Contactmentioning

confidence: 99%

Short papers in geology, hydrology, and topography: Articles 180-239

1963

Professional Paper

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This collection of 60 short papers on subjects in the fields of geology, hydrology, topography, and related sciences is the last of a series released as chapters of Professional Paper 450. The papers in this chapter report on the scientific and economic results of current work by members of the Conservation, Geologic, Topographic, and Water Resources Divisions of the United States Geological Survey. Some of the papers announce new discoveries or present observations on problems of limited scope; other papers draw conclusions from more extensive or continuing investigations that in large part will be discussed in greater detail in reports to be published in the future. Chapter A of this series presents a synopsis of results from a wide range of work done during the 1962 fiscal year.

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2013

The Geophysics of the Pacific Ocean Basin and Its Margin

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Ages of Batholithic Intrusions of Northern and Central Chile

Cited by 53 publications

References 0 publications

Geologic structure of the Taltal Area, Northern Chile, in relation to the earthquake of December 28, 1966

Geologic structure of the Taltal Area, Northern Chile, in relation to the earthquake of December 28, 1966

Short papers in geology, hydrology, and topography: Articles 180-239

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