Here is a high-level approach, with cited examples providing more detailed utility of radiogenic isotopes to constrain tectonic evolution of accreted crust.

Article British Columbia radiogenic isotope compilation (Sr-Nd-Hf-Pb...

This is a very important and insightful question.

In complex orogenic belts, the integration of Sr-Nd-Hf isotope datasets is crucial because it allows us to unravel the multi-stage evolution of these belts with much greater precision than any single system alone.

Each isotope system provides a different perspective:

Sr isotopes are sensitive to crustal input, fluid-rock interaction, and alteration processes, helping identify episodes of crustal recycling and fluid mobility.

Nd isotopes track long-term mantle-crust differentiation and are useful for distinguishing juvenile additions from reworked older crust.

Hf isotopes, especially from zircon, offer a robust record of crustal growth versus recycling, often surviving metamorphic overprinting.

By integrating all three, we can:

Differentiate juvenile crust from recycled components more confidently.

Identify multiple pulses of magmatism and crustal reworking, even when events are closely spaced or overprinted.

Quantify crust-mantle interactions during key stages like terrane accretion, subduction, or magmatic underplating.

Reconstruct the sequence of tectonic events that have shaped the orogenic belt.

For example, isotopically juvenile Hf signatures in zircon coupled with depleted Nd signatures might signal new crust formation, while radiogenic Sr with evolved Nd could reflect reworking of older continental materials.

Ultimately, combining Sr-Nd-Hf systems provides a much clearer, multi-dimensional picture of how continental crust grows, reworks, and evolves through repeated tectonic cycles. It's one of the most powerful tools we have for deciphering the deep-time history of orogenesis.