J
Judith L. Hannah
Researcher at Colorado State University
Publications - 77
Citations - 4323
Judith L. Hannah is an academic researcher from Colorado State University. The author has contributed to research in topics: Sedimentary depositional environment & Oil shale. The author has an hindex of 28, co-authored 70 publications receiving 3898 citations. Previous affiliations of Judith L. Hannah include Norwegian Geological Survey & University of Vermont.
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Dating the rise of atmospheric oxygen
Andrey Bekker,Heinrich D. Holland,Pei-Ling Wang,D. Rumble,Holly J. Stein,Judith L. Hannah,Louis Coetzee,Nicolas J. Beukes +7 more
TL;DR: It is found that syngenetic pyrite is present in organic-rich shales of the 2.32-Gyr-old Rooihoogte and Timeball Hill formations, South Africa, indicating that atmospheric oxygen was present at significant levels during the deposition of these units.
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The remarkable Re-Os chronometer in molybdenite : how and why it works
TL;DR: In this paper, the authors used the Re-Os (rhenium-osmium) chronometer applied to molybdenite (MoS2) to determine the age.
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Primitive Os and 2316 Ma age for marine shale: implications for Paleoproterozoic glacial events and the rise of atmospheric oxygen
TL;DR: In this paper, the Rooihoogte and Duitschland Formation was used to date synsedimentary to early diagenetic pyrite from carbonaceous shale in the Transvaal Supergroup, South Africa.
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Subgrain-scale decoupling of Re and 187Os and assessment of laser ablation ICP-MS spot dating in molybdenite
Holly J. Stein,Anders Scherstén,Anders Scherstén,Anders Scherstén,Judith L. Hannah,R. J. Markey +5 more
TL;DR: In this article, the ages of molybdenite were investigated at the sub-grain (micron) scale, and it was shown that the Re-Os were decoupled from parent 187 Re with time on the micron and larger scale.
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A 2.5 Ga porphyry Cu–Mo–Au deposit at Malanjkhand, central India: implications for Late Archean continental assembly
Holly J. Stein,Holly J. Stein,Judith L. Hannah,Aaron Zimmerman,R. J. Markey,Sanjib Chandra Sarkar,Arnab Pal +6 more
TL;DR: In this paper, the authors used ID-NTIMS data to provide a clear Late Archean-Early Paleoproterozoic age for the Malanjkhand deposit and by implication for its calc-alkaline granitoid host.