Recent posts

#71

Windows / Re: Updated: enabling the WSL ...

Last post by Daniel - January 23, 2025, 10:56:55 PM

Hi Paula

I am on windows 10 (version: 22H2), I followed your tutorial through all the steps no problems, until finally running Melts-rhyolite, I get this message;

---> Default calculation mode is rhyolite-MELTS (v. 1.0.2).  Change this? (y or n): n
---> ************************************************************
---> Calculation mode is rhyolite-MELTS (public release v 1.0.2).
---> ************************************************************
---> Initializing data structures using selected calculation mode...
---> Building interface...
Error: Can't open display:

Thank you, I'll give easyMelts a go.

Thanks again for your help.

Daniel

#72

Windows / Re: Updated: enabling the WSL ...

Last post by Paula - January 23, 2025, 04:18:00 PM

Hi Daniel,

You need to give a bit more information e.g. are you on Windows 10 or 11?

That said, the GUI isn't really supported anymore. The Linux versions haven't been updated since 2018 and the Mac ones are even older. There have been some important bugs fixed in the underlying code but it's getting too difficult to build the interface. Also note that Ubuntu 20.04 LTS is only officially supported by the Ubuntu developers until April this year.

We recommend you try easyMelts instead, which is like a more modern version of the GUI and works on native Windows, Mac and Linux (see the alphaMELTS links page). Although our main development effort is with alphaMELTS we hope to continue providing occasional updates for easyMelts too.

Paula

#73

Windows / Re: Updated: enabling the WSL ...

Last post by Daniel - January 23, 2025, 04:46:54 AM

Hi
I have installed rhyolite-MELTS-Ubuntu-18.04-64bit, however when I try and run it through UBUNTU (20.04.6 LTS) I run into an error "can't open display", I could not find instruction on how to overcome this.

Any help would be appreciated

Thank You
Daniel

#74

alphaMELTS 2 text-menu interface / Re: Problem WARNING text-inter...

Last post by oldpetros - January 10, 2025, 06:39:21 AM

Thanks, Paula!

#75

The MELTS family of algorithms, and scientific discussion / Re: Why no clinopyroxene occur...

Last post by Gary - January 07, 2025, 07:26:16 PM

Hi, Paula

I tried suppressing olivine. The easyMelts did not work. Then I increased the temperatures and decreased the pressures, then there was no fractionate phase. Next should I continue to adjust the conditions until the fractionate clinopyroxene occurs?
Many thanks!

Gary

#76

The MELTS family of algorithms, and scientific discussion / Re: Why no clinopyroxene occur...

Last post by Paula - January 07, 2025, 09:52:25 AM

Hi Gary,

Have you tried suppressing olivine?

Paula

#77

The MELTS family of algorithms, and scientific discussion / Why no clinopyroxene occurs in...

Last post by Gary - January 06, 2025, 09:46:04 PM

Dear Paula

I attempt simulate the magmatic differentiation of mantle-derived lamprophyre magmas. The fractionate phase is always olivine, which actually do not occur in the lamprophyres. Clinopyroxene is the major fractionate phase based on the petrography. The parameters I set are shown in the figure. The temperature and pressure were estimated via the clinopyroxene–liquid thermobarometer. The composition was from the whole rock, which is equilibrium with the clinopyroxene. I want to acquire a simulation that clinopyroxene is the only fractionate phase.

Could you help me find what the problem is at your convenience?

All the best
Gary

#78

alphaMELTS 2 text-menu interface / Re: Problem WARNING text-inter...

Last post by Paula - December 30, 2024, 11:28:27 AM

Hi Alexey,

Yes, you have all the settings correct in the .melts file. The rest - things like Celsius output and 2 amphiboles - are default now, so no mention of these is needed in the .melts file.

Does it have plagioclase? If not, I would use v1.2.0. If it does (have plag), and you are trying to model the ternary minimum then I'm not sure what to suggest offhand but I'll have another go with it after the holiday.

Borisov and Aranovich (https://doi.org/10.1016/j.chemgeo.2020.119817) uncovered an error that means that rutile does not usually crystallize in MELTS when it should. alphaMELTS has a workaround for that but, as the MELTS models were calibrated in part with phase-present / phase-absent constraints, the adjustment can mean that rutile is over stabilized. For backwards compatibility with other MELTS software you may need to suppress rutile.

The biotite model in MELTS has an error in the coding and does not contain TiO2. It's something I was hoping to revisit in the new year (depending on funding).

Best wishes,
Paula

#79

alphaMELTS 2 text-menu interface / Re: Problem WARNING text-inter...

Last post by oldpetros - December 25, 2024, 12:58:17 PM

Thanks, Paula!

• "need choose 3 for the Starting guess instead of 1."- ok, but i recive Tliq=~5000C (this problem i read on forum, also)
• For alphaMelts2 not neeed settings file. All settings write in .melts file. Its correctly? 
• "You should select Rhyolite-MELTS 1.2.0 to get the new H2O model" . I recalc for this variant=ok. But in my last composition contain Quartz-Feldspar! Only v1.1.0 calibration for this?
• I suppress rutile. This for compensation Ti-end-member for biotite? Ti in middle and felsic compositions is essential. In database for Thermocalc/Theriak Domino Ti-Bio included. 

How to solve inconsistency p1 and p3?

best wishes, Alexey

#80

alphaMELTS 2 text-menu interface / Re: Problem WARNING text-inter...

Last post by Paula - December 24, 2024, 04:56:31 PM

Hi Alexey,

I haven't had a chance to debug this fully but a few points in the meantime:

• Yes, you won't be able to find the liquidus of a water-saturated magma in the GUI, as it doesn't have the "Find Wet Liquidus" function. alphaMELTS has it (same implementation as used by MELTS for Excel) but you'll need choose 3 for the Starting guess instead of 1.
• The .melts file and settings_file you are have are alphaMELTS 1.X (which doesn't have the rhyolite-MELTS models). For the current alphaMELTS software you don't usually need the settings_file.
• The only difference for the .melts file is that you need to replace "Log fO2 Delta:" with "Log fO2 Offset:". This is so that alphaMELTS can be more consistent with other MELTS software, such as the Magma Chamber Simulator. Then it should read in the file ok, set the buffer to FMQ - 4 (you probably had FMQ + 0 previously), and turn on fractionation of solids and fluids without you needing to use the menu options.
• If you don't have CO2 in the composition then Rhyolite-MELTS 1.1.0 (new CO2, old H2O) is the same as Rhyolite-MELTS 1.0.2 (no CO2, old H2O). You should select Rhyolite-MELTS 1.2.0 to get the new H2O model.
• One other thing is that you might want to suppress rutile (happy to elaborate another time on why this is the case). Also I would try adding a little MgO to the bulk composition to stabilize the calculation.

With 0.4 grams of MgO I found the wet liquidus at ~1000^oC and the calculation ran down to ~650^oC. You can try smaller amounts of MgO.

You may still get a warning that alphamelts may have crashed (there's a small bug that I need to fix). But this time it won't stop the files being written out and processed correctly.

More soon,
Paula