EARTH AS AN EVOLVING PLANETARY SYSTEM Part 2 potx
EARTH AS AN EVOLVING PLANETARY SYSTEM Part 2 potx
... Settings 130˚ 70˚ 60˚ 110˚ s s R M Eb GBL GSL Cb Beaufort Sea 75˚ Nb 70˚ 60˚ 90˚ 100˚ 110˚ 50˚ 0 500 km Sanivaq Savage Overby Schultz Tremblay Mystery Hudson Bay 126 8 126 5 126 8 Fortress 126 7 126 7 126 8 Snow Bunting 127 2 126 7 Figure 3.10 The giant Mackenzie dyke swarm in northern Canada. This dyke swarm was intruded at 126 7 Ma, probably ... Pangea. Laurentia, which is also pa...
Ngày tải lên: 09/08/2014, 11:20
EARTH AS AN EVOLVING PLANETARY SYSTEM Part 1 ppt
... 100 20 0 +20 0 to +25 0 0 .22 10. Ocean basin 38 12 S 50 +25 0 to +350 0 .29 11. Marginal-sea basin 4 2 U, I 50–150 +50 to +100 0 .25 12. Volcanic island <1 <1 I, U 60–80 +25 0 0 .25 13. Trench 2 ... Precambrian shield q o = 50 mW/m 2 q o = 38 mW/m 2 Thickness Thickness (km) A (mW/m 3 ) q (mW/m 2 ) (km) A (mW/m 3 ) q (mW/m 2 ) 10 0. 42 4 35 0.7* 25 90 0. 02 2 65 0...
Ngày tải lên: 09/08/2014, 11:20
EARTH AS AN EVOLVING PLANETARY SYSTEM Part 3 pot
... Mantle SiO 2 46.0 44.1 46.6 43.6 TiO 2 0.18 0.09 0.04 0.134 Al 2 O 3 4.06 2. 20 1.46 1.18 FeOT 7.54 8.19 6 .24 8 .22 MgO 37.8 41 .2 44.1 45 .2 CaO 3 .21 2. 20 0.79 1.13 Na 2 O 0.33 0 .21 0.09 0. 02 K 2 O ... Hinterland Basins Peripheral foreland and hinterland basins are like retroarc foreland basins in terms of sed- iment provenance and tectonic evolution. Major peripheral fo...
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EARTH AS AN EVOLVING PLANETARY SYSTEM Part 4 ppsx
... Indian ridge, and the Marion hotspot), low but variable 20 6 Pb/ 20 4 Pb ratios occur in the volcanics, and a large range of 20 7 Pb/ 20 4 Pb and 20 8 Pb/ 20 4 Pb ratios are found relative to the 20 6 Pb/ 20 4 Pb ... oceanic and continental areas (Fig. 4.18). Some occur on or near ocean ridges, such as Iceland, St. Helena, and Tristan in the Atlantic basin, and others occur near the...
Ngày tải lên: 09/08/2014, 11:20
EARTH AS AN EVOLVING PLANETARY SYSTEM Part 5 ppt
... biosphere and in particular by sulfate-reducing bacteria that inhabit shallow marine waters. Because of 1 92 The Atmosphere and Oceans 12 2.8 2. 4 2. 0 1.6 Age (Ga) δ 13 C 1 .2 0.8 0.4 700 Ma 22 00 Ma 10 8 6 4 2 0 2 −4 Figure ... volcanic gases 178 The Atmosphere and Oceans may have caused average ocean salinity to drop significantly during the Triassic and Jurassic. Evaporite depo...
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EARTH AS AN EVOLVING PLANETARY SYSTEM Part 6 ppt
... that many nonvolatile elements such as U, Th, and rare earth elements (REEs), which are Earth s Primitive Crust 26 7 Major Archean Cratons Stanovoy Aldan Omolon Ladoga Anshan Pilbara Shabani Barberton Sao Francisco Univak Acasta Wyoming Minnesota EnderbyLand Rocks ... about 530 Ma, land plants 470 Ma, vascular plants 410 Ma, amphibians 370 Ma, reptiles and the amniote egg about 330 Ma,...
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EARTH AS AN EVOLVING PLANETARY SYSTEM Part 7 pptx
... terranes with unique stratigraphy and deformational histories (Van Kranendonk et al., 20 02) : an eastern terrane (3. 72 2. 85 Ga), a western terrane (3 .27 2. 92 Ga), and the Kuranna terrane (≤3 .29 ... of understanding, mantle plumes may have been more frequent in the Archean than afterward. Secular Changes in the Mantle 309 0 123 4 4 3 2 1 5 CaO (%) AI 2 O 3 (%) Archean Proterozoi...
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EARTH AS AN EVOLVING PLANETARY SYSTEM Part 8 ppt
... (g/cm 3 ) (Earth = 1) (Earth = 1) Mercury 0.387 88d 48 0.056 24 39 5.43 5.3 2. 5 12 Venus 0. 723 22 5d 35 0. 82 6051 5 .24 3.95 1.1 0.9 Earth 1 365d 30 1 6378 5. 52 4 1 1 Moon 1 27 .3d* 1* 0.0 12 1738 3.34 ... 0. 12 Mars 1. 52 687d 24 0.11 3398 3.94 3.75 2. 5 0.8 Jupiter 5 .2 11.9y 13 318 71,600 1. 32 Saturn 9 .2 29.5y 9.7 95 .2 60,000 0.69 Uranus 19.1 84y 6.8 14.5 25 ,60...
Ngày tải lên: 09/08/2014, 11:20
EARTH AS AN EVOLVING PLANETARY SYSTEM Part 9 ppsx
... Moon Earth 1 Earth 2 Moon 3 Fe 29 .9 28 .2 8.3 O 30.9 32. 4 44.7 Si 17.4 17 .2 20.3 Mg 15.9 15.9 19.3 Ca 1.9 1.6 3 .2 Al 1.4 1.5 3 .2 Ni 1.7 1.6 0.6 Na 0.9 0 .25 0.06 K 0. 02 0. 02 0.01 Ti 0.05 0.07 0 .2 Values ... events can be estimated. The most useful isotopic pairs are 92 Nb/ 92 Zr (t 1 /2 = 36 My), 1 82 W/ 1 82 Hf (t 1 /2 = 9 My), 146 Sm/ 1 42 Nd (t 1 /2 = 10...
Ngày tải lên: 09/08/2014, 11:20
EARTH AS AN EVOLVING PLANETARY SYSTEM Part 10 doc
... Cretaceous-Tertiary boundary, 25 3 26 0 impact and 580-Ma mass, 26 0 impact related, 25 1 25 3 Permian-Triassic, 26 0 26 2 extinctions, mass, 24 5 26 2 extinctions at Cretaceous-Tertiary boundary, 25 3 26 0 glaciation and mass extinctions, ... time, 20 2 20 6 dolomite-limestone problem, 20 6 20 7 early, 21 0 marine carbonates and evaporites, 20 2 20 4 sea level, 199 20 2 sedimentary...
Ngày tải lên: 09/08/2014, 11:20