KIMBERLITAS,... - DEPSITOS EN KIMBERLITAS LAMPROITAS Y...

Info icon This preview shows pages 1–2. Sign up to view the full content.

DEPÓSITOS EN KIMBERLITAS, LAMPROITAS Y CARBONATITAS. Depósitos de diamantes en kimberlitas y lamproitas. Las Kimberlitas son rocas ígneas ultrabásicas, potásicas, ricas en volátiles, con grandes cristales de olivino, piroxenos, flogopita, granate e ilmenita magnesiana en una matriz de grano fino, en la que además, suelen encontrarse: calcita, serpentina, apatito, espinela, magnetita e ilmenita. Solo un reducido grupo de kimberlitas contienen diamantes y un número aún menor son explotables comercialmente. Estas forman diques que se desarrollan a unos 2km de profundidad. La mayoría tienen una montera arcillosa de 25-100m., de color amarillento, producto de la meteorización y oxidación de su parte superior. Las lamproitas son rocas volcánicas o subvolcánicas (lamprófidos) ricas en potasio y magnesio, con fenocristales y/o matriz de leucito, flogopita rica en titanio, clinopiroxeno, anfibol, olivino y sanidino. Sus minerales accesorios suelen ser: apatito, nefelina, espinela, ilmenita y vidrio.
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

Image of page 2
This is the end of the preview. Sign up to access the rest of the document.
  • Fall '15
  • Carbonato, Roca ígnea, diamante, Roca ultramáfica

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern