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picture1_Geometry Pdf 166801 | 2017 Item Download 2023-01-24 23-10-04


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File: Geometry Pdf 166801 | 2017 Item Download 2023-01-24 23-10-04
precambrian research 104 2000 175 186 www elsevier com locate precamres upper crust of the pilbara craton australia 3d geometry of a granite greenstone terrain peter wellman australian geological sur6ey ...

icon picture PDF Filetype PDF | Posted on 24 Jan 2023 | 2 years ago
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...Precambrian research www elsevier com locate precamres upper crust of the pilbara craton australia d geometry a granite greenstone terrain peter wellman australian geological surey organization po box canberra act received september accepted may abstract in northwest is km region early mid archaean dominated by domes and part covered younger rocks gravity magnetic anomalies are used to map surface under cover infer depth extent structures published seismic refraction interpretation gives two layer for with layers separated velocity gradient at about some have nt amplitude width one half strike length their causative bodies top an average apparent susceptibility si importantly base material thought be small proportion banded iron formation within belts interpreted indicate that margins generally steep many granites similar level another shape over boundaries up mms together inferred density contrast consistent both greenstones extending therefore vertical cylinders crustal depths great ...

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