Hi there it's been awhile.
I thought i'd introduce a new theory, hope this is the correct place on the site for it.
The theory explains why they fled the tent so quickly, were forced to stay away, Doroshenko's foaming mouth, the orange skin of some team members and some aspects of Chivruay.
It's all about the tent containing toxic levels of nitrogen dioxide gas.
The problem with NO2 is that on contact with mucous membranes it slowly converts into nitric acid which has life threatening consequences. Note the slowly bit.https://en.wikipedia.org/wiki/Nitrogen_dioxide_poisoning
"Nitrogen dioxide is sparingly soluble in water and on inhalation, it diffuses into the lung and slowly hydrolyzes to nitrous and nitric acid which causes pulmonary edema and pneumonitis leading to the inflammation of the bronchioles and pulmonary alveolus resulting from lipid peroxidation and oxidative stress.
Also - https://en.wikipedia.org/wiki/Nitric_acid"Concentrated nitric acid stains human skin yellow due to its reaction with the keratin. These yellow stains turn orange when neutralized"
So the theory is that the members of the tent suffered strong exposure to NO2. This forced them to cut openings in the tent for ventilation before giving up and cutting open the tent to escape. Then they had no choice but to abandon the tent and head to the forest to seek shelter.
Subsequently Doroshenko died early of pulmonary edema and some members of the party demonstrated orange skin at their funerals.
So where did the NO2 come from? There are two possibilities both of which rely on the fact that the level base for the tent was produced by cutting down through the snow layer to the ground below (or close enough).
1. A curious version of silo fillers disease. The layer of snow was trapping NO2 build up from the decaying grass (silage) possibly over a wide area of the mountain. Cutting through the snow to pitch the tent "took the stopper out of the bottle" and the tent slowly filled with a toxic level of NO2.
2. Atmospheric microwaves. One of the strongest theories to explain ball lightning (and perhaps the golden orbs known to frequent the region) is microwave energy. - https://www.scientificamerican.com/article/periodically-i-hear-stori/
A by product of microwave energy is the production of ozone and nitrogen oxides including NO2. Now if these gas molecules are ionised and the mountain has the correct polarity then the gas molecules will tend to descend to earth by electrical attraction. But not if the mountain is covered by an insulating blanket of snow. However if you pierce this insulating blanket (with a tent) then the above electrical attraction will be focused on a very small area greatly concentrating the gases.
NO2 is heavier than air so it follows that if there was a slight gradient or more across the floor of the tent then there would be the "unlucky end" where the gas would build up the worst. This offers an explanation for Doroshenko's early death - he was sat/lying at this worst position and suffered the most exposure. Have a look at this photo - https://dyatlovpass.com/resources/340/gallery/Dyatlov-pass-funerals-9-march-1959-36.jpg
under maximum zoom and do you agree that Yuri's face is significantly darker than Zina's? It would fit with this theory that he suffered the worst exposure and died quickly. The nitric acid conversion in his lungs being slow enough to permit him to make his way down the mountain before he died. This also helps explain perhaps why Igor was vomiting but others weren't.
Another photo supporting the NO2 theory imo is the morgue photo of Lyudmila. Notice the area of the chin is completely white from being protected by tight clothing but that there is a graduating scale of light/dark on the forehead to the scalp were vapour would partially stain the skin under a hood.
I don't know a lot about this event but reading the article on this site the following caught my eye :-
1. The darkening of the skin of those that died in the Northern Urals is identical to those that died in the Chivruay tragedy.
Enter the NO2 theory...
2. "The remaining five, hoping that the scouts would return soon, spread out the tent and lay down on top of it. They could not pitch up the tent because of the strong wind.
I would suggest that the five that lay on top of the tent had become incapacitated (like Doroshenko) and had to be left whilst the others sought help and they didn't seek shelter within the tent (pitched or even unpitched) because they recognised that the interior of the tent had poisoned them earlier so they thought it was safer to lie on it rather than in it even thought inside would afford much more shelter.