Skip to main content

Bentonites from Cabo de Gata, Almería, Spain: a mineralogical and geochemical overview

Buy Article:

$13.61 plus tax (Refund Policy)

Abstract:

The Neogene volcanic region of Cabo de Gata, Almería, SE Spain, is dotted with many outcrops of bentonite, some of them of significant economic interest. The bentonites have their origin in the hydrothermal alteration of pyroclastic rocks (15–7 Ma). The deposits are usually associated with fractures. The major mineral is a dioctahedral Fe- and Mg-smectite (89–75%) and this is accompanied by minor amounts of feldspars, quartz, amphiboles, pyroxenes, biotite, zeolites, disordered tridymite, calcite, etc. This paper describes the geological background, the general characteristics of the bentonites and major aspects of their formation, e.g. type of low-temperature hydrothermal solutions, mass balance, chemical evolutions of the smectites and geochemistry of trace elements. Finally, the characteristics of three of the most important deposits are described.

Keywords: ALMERIA; BENTONITE GENESIS; CABO DE GATA; GEOCHEMISTRY; HYDROTHERMAL ALTERATION; HYDROTHERMAL SOLUTIONS; MASS BALANCE; SMECTITE; SPAIN; TRACE ELEMENTS

Document Type: Research Article

DOI: https://doi.org/10.1180/0009855054040184

Publication date: 2005-12-01

More about this publication?
  • Access Key
  • Free ContentFree content
  • Partial Free ContentPartial Free content
  • New ContentNew content
  • Open Access ContentOpen access content
  • Partial Open Access ContentPartial Open access content
  • Subscribed ContentSubscribed content
  • Partial Subscribed ContentPartial Subscribed content
  • Free Trial ContentFree trial content
UA-1313315-23
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more