Geochemistry of some metamorphic and sedimentary rocks from the mineral district of Zacatecas, Zac., México.
The area of study is caracterized by a thick succesion of mainly rhyolitic flows which cover Mesozoic and older metamorphic rocks and a large porphyritic andesite body of Early Tertiary age. Metamorphic rocks have rare earth element (REE) patterns similar to the North American Shale Composite (NASC)...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Universidad Nacional Autónoma de México, Instituto de Geofísica
1978-04-01
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| Series: | Geofísica Internacional |
| Subjects: | |
| Online Access: | http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/1473 |