EARTH AS AN EVOLVING PLANETARY SYSTEM Part 6 ppt
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 267
Major Archean Cratons
Stanovoy
Aldan
Omolon
Ladoga
Anshan
Pilbara
Shabani
Barberton
Sao
Francisco
Univak
Acasta
Wyoming
Minnesota
EnderbyLand
Rocks ... fossil record.
2 36 Living Systems
266 Crustal and Mantle Evolution
and the interior of a convecting cell in the mantle...
EARTH AS AN EVOLVING PLANETARY SYSTEM Part 1 ppt
... (11) 28 6. 5
6. Island arc 7.8 6. 2 (6) 6. 6 (6) 7.2 (7) 19 6. 4
7. Oceanic plateau 8.0 6. 3 (5) 6. 5 (10) 6. 8 (10) 25 6. 5
8. Inland-sea basin 8.1 2–5 (7) 6. 8 (15) 22 [25] 6. 0
Oceanic
9. Ocean ridge ... 8.1 6. 1 (10) 6. 4 (12) 6. 8 (13) 35 6. 4
MC 8.0 6. 0 ( 16) 6. 3 (11) 6. 7 (25) 52 6. 3
4. Continental- 7.9 6. 2 (18) 6. 6 (10) 7.0 (10) 38 6. 4
margin arc
Transition...
EARTH AS AN EVOLVING PLANETARY SYSTEM Part 5 ppt
... volcanic gases
178 The Atmosphere and Oceans
may have caused average ocean salinity to drop significantly during the Triassic and
Jurassic. Evaporite deposition has been sharply episodic, and ... Sun
was 25 to 30% less luminous than it is today and that its luminosity has increased with
time in an approximately linear manner (Kasting, 1987). The paradox associated with
this luminosity chang...
EARTH AS AN EVOLVING PLANETARY SYSTEM Part 7 pptx
... Whereas most of Africa, Antarctica, Australia, and the Americas formed in the
Archean and Paleoproterozoic, much of Eurasia formed in the Meso- and Neoproterozoic
and the Phanerozoic.
Secular Changes ... separate terranes with unique
stratigraphy and deformational histories (Van Kranendonk et al., 2002): an eastern
terrane (3.72–2.85 Ga), a western terrane (3.27–2.92 Ga), and the Kuranna te...
EARTH AS AN EVOLVING PLANETARY SYSTEM Part 8 ppt
... plume volcanism. Except for the Siberian
and Emeishan Traps in eastern Asia, all major flood basalt provinces in the last 200 My
are associated with the opening a new ocean basin (Coffin and Eldholm, ... carbon buried as
organic matter dropped from as much as 50% of the global carbon flux to less than 20%
(Karhu and Holland, 19 96) . After 2 Ga, the fraction of carbon buried as organi...
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
1 268
1 265
1 268
Fortress
1 267
1 267
1 268
Snow Bunting
1272
1 267
Figure 3.10 The giant
Mackenzie dyke swarm in
northern Canada. This dyke
swarm was intruded at
1 267 Ma, probably in
response ... than 6. 0 km/sec are l...
EARTH AS AN EVOLVING PLANETARY SYSTEM Part 3 pot
... zones are sutures and which are not.
Foreland and Hinterland Basins
Peripheral foreland and hinterland basins are like retroarc foreland basins in terms of sed-
iment provenance and tectonic evolution. ... alluvial fans also may be deposited in foreland basins.
The Himalayas
As an example of a young collisional mountain range, none can surpass the High
Himalayas. The Himalayan story began...
EARTH AS AN EVOLVING PLANETARY SYSTEM Part 4 ppsx
... whereas
midocean-ridge basalts (MORB) generally has R/R
A
values of 7 to 9 (Hanan and Graham,
19 96) . In some Pacific MORB, R/R
A
values increase with increasing
2 06
Pb/
204
Pb ratios,
whereas ... 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 centers of plates
(such...
EARTH AS AN EVOLVING PLANETARY SYSTEM Part 9 ppsx
... still occurring on the Earth as ocean-ridge basalts and
oceanic plateaus are produced. At least on the Earth and Venus, where substantial heat
was available, early crust and lithosphere were rapidly ... attest to the strength of the Venusian lithosphere.
366 Comparative Planetary Evolution
Dry Mantle
Solidus
Wet
Mantle
Solidus
OCEAN
BASIN
VENUS
Base of
Elastic
Lithosphere
150
100
50...
EARTH AS AN EVOLVING PLANETARY SYSTEM Part 10 doc
... of solar system, 3 56 381
origin of Moon, 3 96 401
planetary rings, satellites
and, 368 –373
planetary system, Earth as, 1–3
planets, 3 56 368
condensation and accretion of,
388–3 96
giant, 368
Mars, ... multicellular
organisms, 241–243
ocean ridges, 60 66
passive, 155–1 56
oceanic crust, 14– 16
oceanic plateaus and aseismic
ridges, 66
oceans, 198–210
Archean carbonates, 207...