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Low-temperature thermochronology of francolite: Insights into timing of Dead Sea Transform motion

Kohn, Barry and Weissbrod, Tuvia and Chung, Ling and Farley, Ken and Bodorkos, Simon (2019) Low-temperature thermochronology of francolite: Insights into timing of Dead Sea Transform motion. Terra Nova, 31 (3). pp. 205-219. ISSN 0954-4879. https://resolver.caltech.edu/CaltechAUTHORS:20190328-180954041

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Abstract

Cambrian siliciclastic sequences along the Dead Sea Transform (DST) margin in southern Israel and southern Jordan host both detrital fluorapatite [D‐apatite] and U‐rich authigenic carbonate‐fluorapatite (francolite) [A‐apatite]. D‐apatite and underlying Neoproterozoic basement apatite yield fission track (FT) data reflecting Paleozoic‐Mesozoic sedimentary cycles and epeirogenic events, and dispersed (U‐Th‐Sm)/He (AHe) ages. A‐apatite, which may partially or completely replace D‐apatite, yields an early Miocene FT age suggesting formation by fracturing, hydrothermal fluid ascent and intra‐strata recrystallisation, linked to early DST motion. The DST, separating the African and Arabian plates, records ~105 km of sinistral strike‐slip displacement, but became more transtensional post‐5 Ma. Helium diffusion measurements on A‐apatite are consistent with thermally activated volume diffusion, indicating Tc ~52‐56±10°C (cooling rate 10°C/Myr). A‐apatite AHe data record Pliocene cooling (~35‐40°C) during the transtensional phase of movement. This suggests that timing of important milestones in DST motion can be discerned using A‐apatite low‐temperature thermochronology data alone.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1111/ter.12387DOIArticle
ORCID:
AuthorORCID
Farley, Ken0000-0002-7846-7546
Additional Information:© 2018 Wiley. Accepted manuscript online: 04 March 2019.
Issue or Number:3
Record Number:CaltechAUTHORS:20190328-180954041
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190328-180954041
Official Citation:Kohn, B, Weissbrod, T, Chung, L, Farley, K, Bodorkos, S. Low‐temperature thermochronology of francolite: Insights into timing of Dead Sea Transform motion. Terra Nova. 2019; 31: 205–219. https://doi.org/10.1111/ter.12387
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:94271
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:29 Mar 2019 17:16
Last Modified:03 Oct 2019 21:02

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