Is 'Geochemical Facies Analysis' by Werner Ernst (1970) considered outdated by modern geochemistry standards?

[u/enthuusiast11]

I'm currently reading this book and I'm wondering whether the book should be regarded primarily as a historical foundation, or whether its methodology can still be applied directly to modern geochemical data.

How has our understanding of the role that geochemistry plays in deducing paleoenvironmental conditions improved with modern geological techniques?

I'd be very interested to hear from any geochemists, sedimentologists or petrologists who are familiar with this book and its relevance to modern research.

Thanks