Final answer:
The journalist in question does not appear to be Jordi Ruíz Ventura, who has made significant contributions to Physical Anthropology through excavation and analysis work, notably at Les Roquetes.
Step-by-step explanation:
The journalist mentioned in the question does not match the description of Jordi Ruíz Ventura, who is indeed a significant figure in the field of Physical Anthropology. Jordi Ruíz Ventura earned his MSc in Physical Anthropology from the Universitat Autònoma de Barcelona and is noted for his role as the director of fieldwork and laboratory analyses of anthropological evidence at the excavation site of Les Roquetes. Unfortunately, without the correct name or additional information, it's not possible to provide an accurate answer as to who became Pearce's chief field archaeologist. However, Ventura's contribution illustrates the critical role anthropologists and archaeologists play in excavating and preserving our shared heritage. Their work often involves meticulous fieldwork and analysis, laying the foundation for our understanding of past cultures and civilizations.