Nima Nezafati

6 Questions 45 Answers 0 Followers

Questions related from Nima Nezafati

What can this type of magnetite tell us about its condition of occurrence?

Recently, as I was studying some magnetite ores under polarizing microscope, I have observed some magnetite stars (I call them magnetite snowflakes!). Please see the attached picture. I wonder if...

24 August 2023 3,982 6 View

Is this Stockwork?

I have recently visited a mineral occurrence with the following general characteristics: Pervasive argillic alteration in a subvolcanic intermediate rock, sulfide veinlets (partly oxidized),...

02 December 2016 3,842 40 View

Under what conditions can Hematite laths (lamellar hematite) in bornite occur?

Under what conditions can iron-oxide laths (in some cases as box-work texture) form in bornite? Please see the attached picture.

26 September 2014 3,481 26 View

Can we consider the manto-type copper deposits and basalt-andesite copper deposits (including Michigan type copper) the same type of mineralization?

The manto-type copper deposits (e.g. Sato 1984, Kojima et al. 2003), the basalt-andesite copper deposits (including Michigan type and the andesite copper deposits, e.g. Guilbert and Park, 1986,...

20 August 2014 5,205 4 View

Under what conditions would skeletal metal minerals form in natural volcanic rocks?

During my microscopic studies, I have observed numerous skeletal form magnetite grains in andesite porphyry rocks. I wonder under what conditions they have formed. I already know that such...

19 August 2014 8,678 19 View

Why would the total sum of XRF oxides exceed 100%, in some cases?

Sometimes the sum of the major and trace elements of some samples exceeds 100%. I would like to know why this happens.

24 February 2014 7,022 5 View