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What is a basin? Any accumulation of sedimentary or volcanic rocks (basins as rocks) or Any surface depression in which sediment is able to accumulate.

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Presentation on theme: "What is a basin? Any accumulation of sedimentary or volcanic rocks (basins as rocks) or Any surface depression in which sediment is able to accumulate."— Presentation transcript:

1 What is a basin? Any accumulation of sedimentary or volcanic rocks (basins as rocks) or Any surface depression in which sediment is able to accumulate over geological timescales (basins as geomorphic surfaces) After Small et al. (2009)

2 oil & gas water agriculture sand & gravel places to live tectonic archives

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5 Olivine vs. Qtz, B-D transitions Qtz Increased Fe&Mg here, Vp^, strength^ Oliv

6 Earthquakes as an indicator of strength

7 Plates & plate boundaries

8 Earthquakes as an indicator of strength: oceans vs. continents

9 (Ampferer) A-type vs. (Benioff) B-type subduction

10 NASA-GRACE

11 Sedimentary basins (as rocks) require sediment accommodation (space)
Attenuation of the crust due to stretching and erosion (divergent margins); Contraction of lithosphere due to cooling (divergent margins); Depression of both crust and lithosphere by sedimentary or tectonic loading (convergent margins).

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13 eliminate g

14 where is the sediment?

15 A generic cross-section through the crust
Dickinson,

16 Wilson cycle (Wilson, 1966) Because a sedimentary basins can go through different tectonic phases basin classification and nomenclature are based on characteristics of a basin at time of sedimentation.

17 Modern foreland Cenozoic foreland

18 Classification schemes

19 Classification schemes

20 Classification schemes

21 Classification schemes

22 Linear Elasticity E=σn/en

23 ν=eparallel/eperpendicular

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