Homework Help

What percentage of the Earth's surface consists of galena?Galena is the leading lead...

user profile pic

ilovepinto | Student | eNotes Newbie

Posted May 5, 2010 at 11:28 AM via web

dislike 1 like

What percentage of the Earth's surface consists of galena?

Galena is the leading lead mineral.

Tagged with galena, lead, mineral, science

1 Answer | Add Yours

user profile pic

hnystrom | High School Teacher | (Level 1) Assistant Educator

Posted July 12, 2010 at 8:15 PM (Answer #1)

dislike 1 like

It is hard to determine what percent of the Earth's crust is galena. We can estimate it by looking at the prevalence of lead in the Earth's crust.  One source estimates it at .0013% (see second reference below).  Since galena is the most common source of lead in the Earth's crust we can estimate that the percent of galena is a little less than this, say around .001%.  There is likely to be some lead in uranium deposits where the uranium has had time to decay into lead.  There are other minerals of lead but they are less prevalent.  It is hard to say.  If half of the lead were not in the form of galena and the rest was it would still come out to about .001% (rounded up).

Join to answer this question

Join a community of thousands of dedicated teachers and students.

Join eNotes