Marissa J Betts

4 Questions 7 Answers 0 Followers

Questions related from Marissa J Betts

Can anybody help me identify these minerals?

In my petrographic analyses of (mostly) carbonate thin sections I consistently see a black, opaque (or vary slightly transparent - red/orange) mineral either disseminated throughout the sample or...

14 December 2015 7,692 6 View

What is the function of the duplicature in ostracodes?

The duplicature (thin layer of calcified material occurring around the inside margin of ostracod shells), only occurs in podocopes as far as I understand. It is often referred to as an important...

12 March 2015 3,071 1 View

What are the best methods for determining the extent of alteration in a rock sample prior to isotopic analyses?

I am undertaking some chemostratigraphic work with carbon and oxygen isotopes in carbonates. I have used basic petrographic techniques and (cold) cathodoluminescence to gauge diagenesis and...

02 December 2014 680 1 View

Can anyone give me any pointers on using cathodoluminescence to determine extent of alteration/diagenesis in carbonates?

I’m keen to use CL as a quick method to identify appropriate samples for isotope analyses. From what I have read, CL is mostly used to analyse very small parts of a sample. However, I would like...

08 May 2014 7,825 3 View