Apatite as a paleoenvironmental indicator in the Precambrian-mesozoic clastic sequence of the Middle East

Weissbrod, Tuvia; Perath, Ithamar; Nachmias, Joseph

doi:10.1016/0899-5362(87)90036-4

Cited by 8 publications

(1 citation statement)

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“…A‐apatites do not appear in strata younger than Devonian (Weissbrod & Nachmias, ), so Vermeesch et al. () and Weissbrod, Perath, and Nachmias () proposed that its growth resulted from a pulse of U‐rich hydrothermal fluid circulation related to the Palaeozoic thermal event. On the other hand, Segev () suggested a Neogene age for abundant U‐mineralisation and A‐apatite in Cambrian strata in southern Israel.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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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 Palaeozoic–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 to 56 ± 10°C (cooling rate 10°C/Ma). A‐apatite AHe data record Pliocene cooling (~35 to 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.

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Section: Introductionmentioning

confidence: 99%