کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4691035 1636188 2006 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Detrital apatite fission-track ages in Middle Jurassic strata at the rifted margin of W Madagascar—indicator for a protracted resedimentation history
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Detrital apatite fission-track ages in Middle Jurassic strata at the rifted margin of W Madagascar—indicator for a protracted resedimentation history
چکیده انگلیسی

The combination of litho- and biostratigraphic data, detrital apatite fission-track (FT) ages, and palaeocurrent data from Jurassic sedimentary successions in the southern Morondava Basin (SW Madagascar) suggests a resedimentation of the detrital material. Detrital apatite FT ages of Middle Jurassic sedimentary rocks range between 428 ± 31 Ma to 233 ± 18 Ma. All apatite FT ages are older than their stratigraphic ages and become younger from top to the bottom of a Middle Jurassic profile. Such an apatite FT age distribution can be produced by a double inversion of the stratigraphic succession. Since the Late Carboniferous crustal extension between East Africa and Madagascar occurred. The sampled material was initially deposited prior to the Middle Jurassic, most probably during the Karoo Rifting (Latest Carboniferous–Late Triassic). Subsequently, resedimentation occurred during a second sedimentation cycle, which was probably connected to rift jump during the Jurassic Gondwana breakup and passive margin development between East Africa and Madagascar. This study demonstrates that under certain temperature constraints detrital apatite FT age distributions combined with litho- and biostratigraphic data can be used to verify sedimentation–resedimentation events.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sedimentary Geology - Volume 186, Issues 1–2, 15 April 2006, Pages 27–38
نویسندگان
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