Source of the northeastern Idaho batholith: isotopic evidence for a Paleoproterozoic terrane in the northwestern US

P. A. Mueller; R. D. Shuster; K. A. D'Arcy; A. L. Heatherington; A. P. Nutman; I. S. Williams

doi:10.1086/629722

Source of the northeastern Idaho batholith: isotopic evidence for a Paleoproterozoic terrane in the northwestern US

P. A. Mueller, R. D. Shuster, K. A. D'Arcy, A. L. Heatherington, A. P. Nutman, I. S. Williams

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16 Scopus citations

Abstract

The northeastern portion of the Idaho batholith (NIB) intruded Proterozoic rocks of the Belt-Purcell supergroup between 50 and 90 Ma. Premagmatic zircons from one sample of the NIB were analyzed individually using the SHRIMP ion microprobe and yielded a single age population at 1.74 Ga. This apparently single-aged source contrasts with the range of ages reported for zircons from sedimentary rocks of the Belt-Purcell supergroup and suggests that the batholith was not the product of melting Belt-Purcell sediments, nor was it significantly contaminated with these sediments. The source of the batholith, however, appears to be of appropriate age and composition to be a major contributor of sediment to the Belt basin. The source of at least part of the batholith was extracted largely from 1.74 Ga depleted mantle, with little or no input from older rocks. -from Authors

Original language	English (US)
Pages (from-to)	63-72
Number of pages	10
Journal	Journal of Geology
Volume	103
Issue number	1
DOIs	https://doi.org/10.1086/629722
State	Published - 1995
Externally published	Yes

ASJC Scopus subject areas

Geology

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title = "Source of the northeastern Idaho batholith: isotopic evidence for a Paleoproterozoic terrane in the northwestern US",

abstract = "The northeastern portion of the Idaho batholith (NIB) intruded Proterozoic rocks of the Belt-Purcell supergroup between 50 and 90 Ma. Premagmatic zircons from one sample of the NIB were analyzed individually using the SHRIMP ion microprobe and yielded a single age population at 1.74 Ga. This apparently single-aged source contrasts with the range of ages reported for zircons from sedimentary rocks of the Belt-Purcell supergroup and suggests that the batholith was not the product of melting Belt-Purcell sediments, nor was it significantly contaminated with these sediments. The source of the batholith, however, appears to be of appropriate age and composition to be a major contributor of sediment to the Belt basin. The source of at least part of the batholith was extracted largely from 1.74 Ga depleted mantle, with little or no input from older rocks. -from Authors",

author = "Mueller, {P. A.} and Shuster, {R. D.} and D'Arcy, {K. A.} and Heatherington, {A. L.} and Nutman, {A. P.} and Williams, {I. S.}",

year = "1995",

doi = "10.1086/629722",

language = "English (US)",

volume = "103",

pages = "63--72",

journal = "Journal of Geology",

issn = "0022-1376",

publisher = "University of Chicago",

number = "1",

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T1 - Source of the northeastern Idaho batholith

T2 - isotopic evidence for a Paleoproterozoic terrane in the northwestern US

AU - Mueller, P. A.

AU - Shuster, R. D.

AU - D'Arcy, K. A.

AU - Heatherington, A. L.

AU - Nutman, A. P.

AU - Williams, I. S.

PY - 1995

Y1 - 1995

N2 - The northeastern portion of the Idaho batholith (NIB) intruded Proterozoic rocks of the Belt-Purcell supergroup between 50 and 90 Ma. Premagmatic zircons from one sample of the NIB were analyzed individually using the SHRIMP ion microprobe and yielded a single age population at 1.74 Ga. This apparently single-aged source contrasts with the range of ages reported for zircons from sedimentary rocks of the Belt-Purcell supergroup and suggests that the batholith was not the product of melting Belt-Purcell sediments, nor was it significantly contaminated with these sediments. The source of the batholith, however, appears to be of appropriate age and composition to be a major contributor of sediment to the Belt basin. The source of at least part of the batholith was extracted largely from 1.74 Ga depleted mantle, with little or no input from older rocks. -from Authors

AB - The northeastern portion of the Idaho batholith (NIB) intruded Proterozoic rocks of the Belt-Purcell supergroup between 50 and 90 Ma. Premagmatic zircons from one sample of the NIB were analyzed individually using the SHRIMP ion microprobe and yielded a single age population at 1.74 Ga. This apparently single-aged source contrasts with the range of ages reported for zircons from sedimentary rocks of the Belt-Purcell supergroup and suggests that the batholith was not the product of melting Belt-Purcell sediments, nor was it significantly contaminated with these sediments. The source of the batholith, however, appears to be of appropriate age and composition to be a major contributor of sediment to the Belt basin. The source of at least part of the batholith was extracted largely from 1.74 Ga depleted mantle, with little or no input from older rocks. -from Authors

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Source of the northeastern Idaho batholith: isotopic evidence for a Paleoproterozoic terrane in the northwestern US

Abstract

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