I have tried to do this question but I couldn\'t so I need help. What does the c
ID: 236918 • Letter: I
Question
I have tried to do this question but I couldn't so I need help. What does the compsition of the layers of Zorgon mean? What am I supposed to put there? Trying to understand and my professors did not explained anything about this.
Homework #2: Earth's Layers (50 points) As you know, geologists have inferred the composition of the Earth's crust, mantle, and core using various lines of geological and physical evidence. This activity asks you to use the same reasoning used to infer the composition of Earth to infer the composition of a fictional planet, Zorgon, for which chemical data are available. The following conclusions have been established for Zorgon based on analysis of its rock samples and geophysical All volcanoes on Zorgon originate in the Zorgonian mantle and produce lavas with a typical chemical composition given in Table 1. Volcanoes on Zorgon occasionally bring up xenoliths, and three representative samples are shown in Table 1. The P-wave velocity of the Zorgonian crust is approximately 4.5 km/s. The P-wave velocity of the Zorgonian mantle is approximately 5.5 km/s. . .The P-wave velocity of the Zorgonian core is approximately 10 km/s .The S-wave velocity in the Zorgonian core is 7 km/s Just like on Earth, slabs of oceanic mantle+crust are exposed on Zorgon. On Earth they're called "ophiolites"; on Zorgon, they're called "zophilites". A zophiolite located on the island of BhmiRoku exposes two types of rock, one overlying the other. Both compositions are given in Table 1. Zorgon has no magnetic field. The average density of Zorgon, determined from planetary motions, is 4,000 kg/m3 Two types of meteorites have been collected on Zorgon, Type A and Type B. Both compositions are given in Table 1 . Table 1: Rock and lava compositions on Zorgon Typical Zophiolite- Zophiolite-Meteorites Sam Xenoliths Type-A T 59.0 60.3 60.1 17.3 17.3 15.0 6.75.98.1 3.6 3.0 3.1 7.0 5.9 6.5 3.5 3.33.7 3.1 4.5 2.4 58.7 17.5 6.9 3.4 6.6 3.8 2.6 49.2 14.1 11.8 8.8 10.4 2.4 8.5 61.2 58.351.5 16.5 17.114.7 6.97.3 3.4 3.5 .25.8 11.3 3.6 3.5 3.8 4.0 0.53 41.8 50.0 1.5 7.4 Al2O3 13.8 12.0 8.4 12.4 4.1 7.4 3.9 2.0 0.6 0.13 0.05 0.45 Na:0 2.3 on Earth, the terms “ultramafic", "mafic", "intermediate", and "felsic" are used to classify the composition of rocks and magmas. Use these same terms ("Earth-like compositions") to identify each of the samples in Table 1, and note it in the last row. Use the abbreviations UM (ultramafic), M (mafic), I (intermediate), F (felsic), and Fe (nearly pure iron). (11 pts) Do you think Zorgon has a liquid core? Why or why not? (3 pts)Explanation / Answer
answer- after the study of various geophysical data (seismic data) and various chemical analysis of rock, meteorite and typical lava sample. following observation have been made about the zorgonian crust
1- zorgoian crust is composed id composed of silicic rocks which are felsic (F) in nature.
2- rock are riched in Silica, aluminimum content and low in iron and magnesium contents.
3- volocano originated here are are Rhyolitic composition. volcano are highly explosive. lava is highly viscous rich in silicate contents
4- the average p wave velocity is about 4.5 km/sec which is quite similar to earth. the velocity of p wave increse in its velocity on incresing in depth
Observation made about Zorogonian Mantle
1- from the study of mantle xenolith it have been found that there is increse in the silica content on incresing depth. rocks are becoming more felsic in nature as you can seen in the table the chemical composition of the mantle xenolith richer in silica and aluminium concentration in the comparision of surface sample.
2- on obsering the Zophiolite upper sample representing of intermediate compostion rock while lower zophiolite rock represents mafic composition the silica content is about 49%.
3 the velocity of p wave velocity which depends upon the elasticty of rock is incresing reach upto 5.5km/sec which is lower than earth mantle is about 7km/sec
4 On the lower mantle there is decrese in the silica and aluminimum concentration and increse in iron and manesium concentration which results in increse in the p wave velocity
observation about the Zorgonian core
1- rocks are becoming more mafic on incresing in depth. rocks are becoming more rigid. rich in iron and nickil and magnesium concentration.
2- the p wave velocity is 10 km/sec which slight lower than earth core. In the case of earth core the p wave veocity reach upto 13 km/sec
3- the s wave velocity is 7 km/sec represnting that the core region is also solid not like the earth where s wave do not propogate because of liquid outer core where s wave donot propagate.