Trisrota Chaudhuri

10 Questions 25 Answers 0 Followers

Questions related from Trisrota Chaudhuri

What type of natural sample should be targeted to make secondary reference material for oxygen isotope analysis?

What kind of rock should be targeted to prepare secondary oxygen isotope standard? The mineral of interest is quartz.

28 April 2024 6,318 2 View

Can magnetite and pyrite crystallise together from a same but evolving hydrothermal fluid? Is there any reference paper?

if the fugacity of S rises or fugacity of O drops, is it possible to precipitate magnetite and pyrite from a same hydrothermal fluid? Is there any case study?

05 March 2024 7,557 5 View

Can anyone please share the soft copy of the book described below?

Secondary ion mass spectrometry: basic concepts, instrumental aspects, applications, and trends By A. Benninghoven, F. G. Rudenauer, H. W. Werner · 1987 ISBN:9780471010562,...

31 May 2023 1,366 0 View

How to identify original source of a medium grade, deformed quartzo-feldspathic schist?

Hi all, I am studying a coarse grained staurolite-garnet-sillimenite (fibrolitic) bearing quartzo-feldspathic schist (quartz-feldspar-biotite-muscovite-garnet-staurolite-sillimenite) from a...

09 September 2019 4,831 7 View

Is it possible to calculate the uncertainty in epsilon Nd/epsilon Hf composition by error propagation method?

Uncertainty in the values of eNd(t) or eHf(t) (epsilon Nd or Hf) of a particular sample (rock or mineral) depends on several things including uncertainties in the present day isotopic ratios and...

18 July 2019 4,321 3 View

How I can differentiate muscovite from pyrophylite from EPMA data?

I am working on high-Al pelites and I need to know if all the white mica in my rocks are actually muscovite or some of them are pyrophyllite. Since I could not differentiate them during...

15 July 2019 7,528 11 View

How to calculate average 176Lu-176Hf from a regression line in εHf-207Pb/206Pb age (Ma) plot?

In an εHf vs. 207Pb/206Pb age (Ma) plot, the regression line (best fit) can be drawn from the data point scatter. From the slope of such best fit line, average 176Lu/176Hf ratio can be calculated....

03 July 2017 4,853 3 View

Where can I get excel spreadsheet/freeware to calculate Raman spectral parameters such as FWHM and others?

Different spectral parameters such as ID/IG, R2, are calculated to analyze Raman spectra. Is there any freeware/excel spreadsheet from which I can calculate these parameters from raw spectral...

21 June 2017 1,384 6 View

If I don't have modal mineralogy of starting material for trace element modelling, having only bulk rock composition, can I use CIPW norm instead?

For trace element modelling, we need modal mineral abundance of the starting material to calculate bulk Kd. Supposing we have only whole rock composition of the starting material, can we use...

26 April 2017 312 8 View

Oxygen isotope of quartz in granitoids

What are the prospects of analysing oxygen isotope ratios of quartz from Precambrian granitoids? Is it useful despite that a granitoid suite is the product of magmatic differentiation? Moreover...

01 January 1970 4,431 1 View