Source: Stewart et al., 2001. Strontium vs. Calcium Both are alkaline earth elements with +2 valence...
-
Upload
paulina-lang -
Category
Documents
-
view
218 -
download
0
Transcript of Source: Stewart et al., 2001. Strontium vs. Calcium Both are alkaline earth elements with +2 valence...
![Page 1: Source: Stewart et al., 2001. Strontium vs. Calcium Both are alkaline earth elements with +2 valence charge Strontium –Atomic number = 38 –Ionic Radius.](https://reader035.fdocuments.in/reader035/viewer/2022062322/56649dba5503460f94aab6fc/html5/thumbnails/1.jpg)
Source: Stewart et al., 2001
![Page 2: Source: Stewart et al., 2001. Strontium vs. Calcium Both are alkaline earth elements with +2 valence charge Strontium –Atomic number = 38 –Ionic Radius.](https://reader035.fdocuments.in/reader035/viewer/2022062322/56649dba5503460f94aab6fc/html5/thumbnails/2.jpg)
Strontium vs. Calcium
• Both are alkaline earth elements with +2 valence charge
• Strontium – Atomic number = 38– Ionic Radius = 1.18 angstroms
• Calcium– Atomic number = 20– Ionic Radius = 1.00 angstroms
![Page 3: Source: Stewart et al., 2001. Strontium vs. Calcium Both are alkaline earth elements with +2 valence charge Strontium –Atomic number = 38 –Ionic Radius.](https://reader035.fdocuments.in/reader035/viewer/2022062322/56649dba5503460f94aab6fc/html5/thumbnails/3.jpg)
Source: Kennedy et al., 2002
![Page 4: Source: Stewart et al., 2001. Strontium vs. Calcium Both are alkaline earth elements with +2 valence charge Strontium –Atomic number = 38 –Ionic Radius.](https://reader035.fdocuments.in/reader035/viewer/2022062322/56649dba5503460f94aab6fc/html5/thumbnails/4.jpg)
Source: Capo et al., 1998
![Page 5: Source: Stewart et al., 2001. Strontium vs. Calcium Both are alkaline earth elements with +2 valence charge Strontium –Atomic number = 38 –Ionic Radius.](https://reader035.fdocuments.in/reader035/viewer/2022062322/56649dba5503460f94aab6fc/html5/thumbnails/5.jpg)
Source: Capo et al., 1998
![Page 6: Source: Stewart et al., 2001. Strontium vs. Calcium Both are alkaline earth elements with +2 valence charge Strontium –Atomic number = 38 –Ionic Radius.](https://reader035.fdocuments.in/reader035/viewer/2022062322/56649dba5503460f94aab6fc/html5/thumbnails/6.jpg)
![Page 7: Source: Stewart et al., 2001. Strontium vs. Calcium Both are alkaline earth elements with +2 valence charge Strontium –Atomic number = 38 –Ionic Radius.](https://reader035.fdocuments.in/reader035/viewer/2022062322/56649dba5503460f94aab6fc/html5/thumbnails/7.jpg)
Strontium Isotope System
• Indicator of both age and geochemical origin– Older rocks with same initial Rb/Sr will have
higher 87Sr/86Sr than younger ones.– Rocks of a given age composed of different
minerals will show differentiation in strontium ratios
– The combination of these factors allows strontium to be used a tracer of cation source
![Page 8: Source: Stewart et al., 2001. Strontium vs. Calcium Both are alkaline earth elements with +2 valence charge Strontium –Atomic number = 38 –Ionic Radius.](https://reader035.fdocuments.in/reader035/viewer/2022062322/56649dba5503460f94aab6fc/html5/thumbnails/8.jpg)
Source: Capo et al., 1998
![Page 9: Source: Stewart et al., 2001. Strontium vs. Calcium Both are alkaline earth elements with +2 valence charge Strontium –Atomic number = 38 –Ionic Radius.](https://reader035.fdocuments.in/reader035/viewer/2022062322/56649dba5503460f94aab6fc/html5/thumbnails/9.jpg)
Strontium as a Tracer of Soil Cation Source: Weathering vs. Atmospheric Deposition
• Mass Balance – Two Member Mixing
• Must have sufficient difference between the two end members
• Must assume steady-state weathering or use more complex models to simulate changes in end members
![Page 10: Source: Stewart et al., 2001. Strontium vs. Calcium Both are alkaline earth elements with +2 valence charge Strontium –Atomic number = 38 –Ionic Radius.](https://reader035.fdocuments.in/reader035/viewer/2022062322/56649dba5503460f94aab6fc/html5/thumbnails/10.jpg)
Source: Bullen et al., 1997
![Page 11: Source: Stewart et al., 2001. Strontium vs. Calcium Both are alkaline earth elements with +2 valence charge Strontium –Atomic number = 38 –Ionic Radius.](https://reader035.fdocuments.in/reader035/viewer/2022062322/56649dba5503460f94aab6fc/html5/thumbnails/11.jpg)
Source: White et al., 1999
![Page 12: Source: Stewart et al., 2001. Strontium vs. Calcium Both are alkaline earth elements with +2 valence charge Strontium –Atomic number = 38 –Ionic Radius.](https://reader035.fdocuments.in/reader035/viewer/2022062322/56649dba5503460f94aab6fc/html5/thumbnails/12.jpg)
Source: Blum et al., 2002
![Page 13: Source: Stewart et al., 2001. Strontium vs. Calcium Both are alkaline earth elements with +2 valence charge Strontium –Atomic number = 38 –Ionic Radius.](https://reader035.fdocuments.in/reader035/viewer/2022062322/56649dba5503460f94aab6fc/html5/thumbnails/13.jpg)
Source: Kennedy et al., 2002
![Page 14: Source: Stewart et al., 2001. Strontium vs. Calcium Both are alkaline earth elements with +2 valence charge Strontium –Atomic number = 38 –Ionic Radius.](https://reader035.fdocuments.in/reader035/viewer/2022062322/56649dba5503460f94aab6fc/html5/thumbnails/14.jpg)
![Page 15: Source: Stewart et al., 2001. Strontium vs. Calcium Both are alkaline earth elements with +2 valence charge Strontium –Atomic number = 38 –Ionic Radius.](https://reader035.fdocuments.in/reader035/viewer/2022062322/56649dba5503460f94aab6fc/html5/thumbnails/15.jpg)
Figure 2: Location of proposed field sites in the San Juan Mountains in relation to the western US deserts.
Field Sites
![Page 16: Source: Stewart et al., 2001. Strontium vs. Calcium Both are alkaline earth elements with +2 valence charge Strontium –Atomic number = 38 –Ionic Radius.](https://reader035.fdocuments.in/reader035/viewer/2022062322/56649dba5503460f94aab6fc/html5/thumbnails/16.jpg)
![Page 17: Source: Stewart et al., 2001. Strontium vs. Calcium Both are alkaline earth elements with +2 valence charge Strontium –Atomic number = 38 –Ionic Radius.](https://reader035.fdocuments.in/reader035/viewer/2022062322/56649dba5503460f94aab6fc/html5/thumbnails/17.jpg)
87/86Sr 143/144Nd εNd
Surface rocks 0.707397 (0.000013) 0.512216 -8.23
Dust Events
April 1, 2005 0.720471 (0.000013) 0.512089 -10.71
April 4, 2005 0.716402 (0.000012) 0.512084 -10.81
April 8, 2005 0.714878 (0.000009) 0.512104 -10.42
May 9, 2005 0.713525 (0.000007) 0.512103 -10.44
![Page 18: Source: Stewart et al., 2001. Strontium vs. Calcium Both are alkaline earth elements with +2 valence charge Strontium –Atomic number = 38 –Ionic Radius.](https://reader035.fdocuments.in/reader035/viewer/2022062322/56649dba5503460f94aab6fc/html5/thumbnails/18.jpg)
![Page 19: Source: Stewart et al., 2001. Strontium vs. Calcium Both are alkaline earth elements with +2 valence charge Strontium –Atomic number = 38 –Ionic Radius.](https://reader035.fdocuments.in/reader035/viewer/2022062322/56649dba5503460f94aab6fc/html5/thumbnails/19.jpg)
![Page 20: Source: Stewart et al., 2001. Strontium vs. Calcium Both are alkaline earth elements with +2 valence charge Strontium –Atomic number = 38 –Ionic Radius.](https://reader035.fdocuments.in/reader035/viewer/2022062322/56649dba5503460f94aab6fc/html5/thumbnails/20.jpg)
Source: Chadwick et al., 1999
![Page 21: Source: Stewart et al., 2001. Strontium vs. Calcium Both are alkaline earth elements with +2 valence charge Strontium –Atomic number = 38 –Ionic Radius.](https://reader035.fdocuments.in/reader035/viewer/2022062322/56649dba5503460f94aab6fc/html5/thumbnails/21.jpg)
Source: Stewart et al., 2001