Portuguese 
Mapping of Rare Earth Elements in Sergipe Took Around Ten Years of Hammering, Magnifying Glass, and Walking Over the Granites of Alto Sertão Before the Federal University of Sergipe Team Could Confirm Which Minerals Contain the Highly Sought Elements.
Herbert Conceição is a full professor of Petrology at the Federal University of Sergipe. Petrology, for those unfamiliar, is the branch of geology that studies how rocks are formed.
Alongside Professor Maria de Lourdes da Silva Rosa, also from UFS, he spent nearly a decade traversing the granites of Sergipe’s Sertão in search of a very specific answer.
The question wasn’t whether there was rock; there has always been rock. Rather, the duo wanted to identify which minerals in those granite bodies could concentrate economically valuable elements.
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The Team Found Neodymium, Niobium, and Tantalum in the Same Granite Zone of Alto Sertão
According to the research, the identified elements include neodymium, niobium, tantalum, uranium, zirconium, radium, and gold. These are seven names that rarely appear together in a single regional news story.
Neodymium stands out in current discussions because it’s essential in manufacturing permanent magnets. Niobium and tantalum are also significant in the realm of metal alloys and electronic components.
The surveyed area extends from Nossa Senhora da Glória to Poço Redondo and Canindé de São Francisco, three municipalities in Sergipe that typically do not feature in discussions about the global supply chain of critical minerals.
At first glance, it may seem like a modest geographical area. However, the fieldwork backing this discovery was anything but modest in duration.
Ten Years in the Field Produced a Map, Not a Mine
Here’s the part that often gets lost when the topic shifts to headlines. Locating the occurrence is merely the first step on a much longer journey.
According to the researchers, the occurrences have already been identified, and the current phase is different: evaluating the economic potential of what lies beneath Sergipe’s surface.
In other words, knowing the element exists in the rock does not mean it’s worth extracting. Those are two distinct questions, and the latter can be costly.
The Professor States That the Average Time Between Discovery and Mine Operation Is 10 to 15 Years
Herbert Conceição’s statement is straightforward and merits careful consideration. “The average is 10 to 15 years from identification to having an operational mine,” the professor stated.
Add this to the time already spent. It took about 10 years just to create a map of occurrences, and the clock for economic viability is still running.
Therefore, in the most optimistic scenario, someone who started hammering that granite would be looking at a total horizon close to 20 years before extraction can begin.
It’s hard not to notice the contrast. News about rare earths often conveys a rush akin to a sprint, while geology operates on the timeline of an entire academic career.
The Work Has Started to Attract Corporate Interest
According to the released survey, there has been increased interest from companies in what was identified in the region.
No company names have been disclosed, nor any public proposals or amounts on the table. There is merely the indication that the phone started to ring after a decade of silence.
This movement makes sense within the mineral cycle. Companies rarely start from scratch when there is prior academic research mapping where it’s worth looking first.
Maria de Lourdes Goes to the United States as the Sole Representative of the Northeast
Herbert’s partner in this decade of fieldwork has been selected for the Fulbright-CNPq Mission on Rare Earths and Critical Minerals in the United States.
The mission takes place between September 19 and October 1, 2026, with a delegation of ten Brazilian researchers chosen for the trip.
Within this group, Maria de Lourdes da Silva Rosa is the only representative from the Northeast. A professor at UFS holding the only seat from that region in the national delegation.
The symbolism is striking. The region that often appears in such discussions as a territory to be explored is now seen as one that has produced knowledge.
The Granite of Sertão Was Late to the Radar of Critical Minerals
Rare earths and critical minerals have become a geopolitical topic in recent years due to the industrial dependency they created in technology and energy supply chains.
However, the foundation of all this continues to be slow geological work, conducted on foot, with samples in hand followed by analysis. There is no shortcut to this stage.
The research from UFS, released on September 8, 2026, is precisely a reflection of this productive slowness that rarely fits into market headlines.
Assessing Economic Potential Is a Different Step from Finding the Element
Finding neodymium in a rock answers a scientific question. Deciding whether that rock becomes a mine answers an industrial question, involving cost, logistics, and licensing.
That’s why the current phase of the Sergipe duo is as crucial as the previous one. It’s in this phase that it will be determined whether the decade of fieldwork turns into a project or remains as scientific documentation.
While this equation remains unresolved, what exists in Sergipe is a mapped occurrence. A technical term, without promising implications, and far more honest than the loosely used term deposit.
Three Municipalities Entered the Map Due to Fieldwork, Not Announcements
Nossa Senhora da Glória, Poço Redondo, and Canindé de São Francisco did not appear in this story due to a corporate announcement. They emerged through researchers’ efforts.
Information about the mapping was published by the portal Só Sergipe, which detailed the scope of the study in Poço Redondo and the neighboring municipalities in the studied area.
However, no content, tonnage, or area dimensions have been disclosed so far. What is publicly known is the set of elements identified and the region where it occurs.
Time is the most concrete piece of information in this story
I wonder how many times, over the course of ten years, that work seemed to get nowhere before becoming national news.
Thus, the most solid data left from this research is not a concentration number. It is the timeline that the researcher himself laid out straightforwardly.
From 10 to 15 years between identification and operation, according to him. Any hasty reading about rare earth elements in the Northeast bumps into this statement.
Moreover, the case demonstrates that a small state public university continues to produce the type of information that no company can buy ready-made.
Would you have the patience to spend ten years breaking rocks in the hinterland only to find out if it’s worth it?
