ERO.TO · 2019-04-18 12:00:00

Ero Copper intersects 24.6 meters grading 7.56% copper including 7.7 meters grading 15.97% copper in southern extension of the Vermelhos Mine

Drill Results

TSX: ERO

Ero Copper Corp

APRIL 18, 2019 NR:19-4

Ero Copper intersects 24.6 meters grading 7.56% copper including 7.7 meters grading 15.97%

copper in southern extension of the Vermelhos Mine

Vancouver, British Columbia – Ero Copper Corp. (the “Company”) (TSX: ERO) is pleased to

provide a quarterly update on the ongoing exploration drill programs at its Pilar and Vermelhos

mineral districts, both part of its 99.6% owned Vale do Curaçá Property located in Bahia State,

Brazil, as well the first exploration update on the Company’s 97.6% owned NX Gold Mine located

in Mato Grosso State, Brazil . This update encompasses drill results received for the Company’s

ongoing exploration programs from December 2018 through to the end of March 2019.

HIGHLIGHTS

• Twenty four drill rigs are currently operating throughout the Curaçá Valley, including 11

within the Vermelhos District and 13 within the Pilar District. Three of these drill rigs are

testing high-priority regional exploration targets located within these districts.

• Within the Vermelhos District, where 11 drill rigs are currently operating including eight

focused on long- term exploration , drill results during the period reflect meaningful

increases in both previously modeled thickness and the known extent of mineralization of

the Vermelhos Mine and District. When combined with results of the recently completed

regional airborne geophysical survey and data compilation programs, the results continue

to indicate significant pote ntial for extensions of the Vermelhos Mine along a north-

northeast trending structure that, to-date, has been interpreted to extend over 5.5

kilometers. Vermelhos Mine and District drill results are highlighted by the following

zones (please refer to complete table of results for additional information):

o Southern extension of high-grade mineralization adjacent to existing infrastructure,

including hole FVS -354 that intersected 17.0 meters grading 6.76% copper

including 3.0 meters grading 17.19% copper, and hole FVS-364 that intersected 9.4

meters grading 1.66% copper and 24.6 meters grading 7.56% copper including 7.7

meters grading 15.97% copper. These holes indicate mineralized continuity in areas

previously defined as discrete lenses south of the Sombrero orebody.

o Central expansions of the mineralized thickness of the Toboggan orebody,

highlighted by hole FVS -337 that intersected 23.8 meters grading 8.06% copper

including 8.0 meters grading 9.20% copper and hole FVS-355 that intersected 25.0

meters grading 7.32% copper including 16.0 meters grading 9.67% copper, a 70%

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Ero Copper Corp

increase in the modeled thicknesses of the mineralization in the immediate area

surrounding these new results.

o Regionally within the Vermelhos District, exploration drilling below the known

extent of mineralization at Vermelhos West (now referred to as the “N8 Deposit”),

located approximately 1.1 kilometers north of the Vermelhos Mine , demonstrate

continuity of mineralization at depth. Results are highlighted by hole FV-130 that

intersected multiple lenses of mineralization including 17.2 meters grading 1.16%

copper and 15.4 meters grading 1.81% copper.

o While the aforementioned program s remain ongoing, exploration drilling within

the Vermelhos District is now focused on a north-northeast mineralized trend

encompassing the Vermelhos Mine, East Zone, N8 Deposit and several high-

priority regional targets located south and to the north of the Vermelhos Mine – a

combined strike length of approximately 5.5 kilometers.

• Within the Pilar District, where 13 drill rigs are currently operating, including nine focused

on long -term exploration , underground drilling has identified a high -grade zone of

mineralization in the southern portion of the West Limb . In addition, a newly identified

and now digitized historic drill database encompassing 53 drill holes, of which 20 have

been validated under the Company’s quality assurance and quality control (“QA/QC”)

program, has significantly extended the drilled extent of the West Limb . The historic

database was discovered during the Company’s ongoing data digitization program. The

data encompasses an area within the West Limb measuring approximately 300 meters in

length by 275 meters in depth located immediately south of the previously defined resource

model of the West Limb. The 33 remaining historic drill samples are being systematically

reviewed and validated via re-assaying and twin-hole drilling as required. West Limb

results during the period are highlighted by:

o A n ewly identified and digitized historical database resulting in a significant

extension of the drilled extent of the West Limb, highlighted by hole FC3798 that

intersected 11.0 meters grading 1.95% copper and hole FC3837 that intersected

20.0 meters grading 1.23% copper.

o New results drilled by the Company in the southern portion of the West Limb are

highlighted by a cluster of high -grade holes including: FC38157 that intersected

16.7 meters grading 3.31% copper including 3.0 meters grading 7.85% copper and

FC38159 that intersected 10.5 meters grading 4.00% copper including 3.0 meters

grading 8.70% copper . These drill results are significant as they were drilled

approximately 100 meters south of the previousl y defined resource model of the

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West Limb zone and approximately 250 meters south of the P1P2W mining area

within the West Limb and within the area of the newly discovered historic database.

In addition to these results, hole FC3482 that intersected 9.0 meters grading 1.82%

copper and hole FC3843 that intersected 6.3 meters grading 2.16% copper were

drilled approximately 250 meters south of the previously defined resource model

of the West Limb zone, and another 150 meters south of the holes highlighted

previously.

• Drilling in the Deepening Extension zone, located in the Pilar Mine , continues to extend

mineralization beyond what was previously believed to be the southern limits of the mine’s

mineral resources at depth. The results are highlighted by hole FC38162 that intersected

13.2 meters grading 1.58% copper including 6.0 meters grading 2.06% copper. These new

results, when combined with previously announced exploration results (see press release

dated December 11, 2018), highlight that the Deepening Extension remains open to depth

and to the south.

• At the Company’s 97.6% owned NX Gold Mine, where six long-term exploration drill rigs

are currently operating, a significant new discovery was made. The new discovery, known

as Santo Antonio, is a new zone of mineralization located between and on-trend of the Bras

and Buracão ve ins. To-date, mineralization has been delineated over approximately 400

meters in strike-length and approximately 200 meters down-dip and remains open to depth.

Development into this new vein has commenced while drilling to confirm the extent of

mineralization remains ongoing. The Santo Antonio discovery is highlighted by drill holes:

o SA13 that intersected 3.0 meters grading 19.38 grams per tonne gold

o SA22 that intersected 3.8 meters grading 19.03 grams per tonne gold

o SA31 that intersected 8.8 meters grading 6.89 grams per tonne gold

Expansions and e xtensions as referenced herein reflect mineralization not captured in the

Company’s mineral resource and mineral reserve models used in the current National Instrument

43-101, Standards of Disclosure for Mineral Projects (“NI 43-101”) compliant mineral resource

and reserves. Currently, 24 drill rigs are operating within the Curaçá Valley and six drill rigs are

operating at the NX Gold Mine.

VERMELHOS DISTRICT

The Vermelhos District is located approximately 80 kilometers to the north of the Pilar Mine and

Caraíba Mill complex and includes the newly constructed high -grade Vermelhos Mine. Drilling

is focused on expansion and new discovery initiatives (including the Vermelhos East Zone) within

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and immediately adjacent to the Vermelhos Mine , and on near-mine targets identified during the

Company’s regional airborne survey and subsequent data compilation work. The Vermelhos

system, encompassing the Vermelhos Mine, East Zone and N8 Deposit, is now believed to extend

over 5.5 kilometers in strike length. Eleven drill rigs are currently operating within the District,

including eight focused on long-term exploration.

Vermelhos Main Orebody Expansions

Exploration drilling within the main Vermelhos orebodies continues to target expansions and

extensions of the mineral resource, with a focus during the period on both infill drilling and testing

several electromagnetic (“EM”) anomalies identified during the Company’s systematic and

ongoing bore hole EM programs. Drilling during the period continued to expand and extend the

mineral resource and mineral reserve models of the Vermelhos Mine as set out in the current NI

43-101 compliant technical report.

Thirteen holes drilled during the period highlight both extension and expansion of the previously

modeled southern extent of the mineralization within the Sombrero orebody of the Vermelhos

Mine. Significant results are highlighted by hole FVS-326 that intersected 21.4 meters grading

5.52% copper including 9.2 meters grading 7.64% copper; hole FVS -354 that intersected 17.0

meters grading 6.76% copper including 3.0 meters grading 17.19% copper, and hole FVS-364 that

intersected 9.4 meters grading 1.66% copper and 24.6 meters grading 7.56% copper including 7.7

meters grading 15.97% copper. These holes are significant as this area of the Sombrero orebody

was previously modeled as small discrete lenses at the southern edge of the orebody , rather than

as a more continuous high-grade extension of the mineralization of the Sombrero orebody.

Additionally, nine drill holes were drilled during the period that demonstrate central expansions of

the Toboggan orebody of the Vermelhos Mine. The results are highlighted by hole FVS-337 that

intersected 23.8 meters grading 8.06% copper including 8.0 meters grading 9.20% copper and hole

FVS-355 that intersected 25.0 meters grading 7.32% copper including 16.0 meters grading 9.67%

copper. The mineralized thicknesses of these intercepts are significant as, together, they represent

an approximate 70% increase in the modeled thickness es of the mineralization in the immediate

area surrounding these holes when compared to the current mineral resource and reserve estimate.

Please see Figure 1 for drill collar locations and Figure 2 for a north- south long section of the

Vermelhos Mine including the N8 Deposit and the East Zone.

Sombrero South Expansion

Hole ID From (m) To (m) Length (m) Cu (%)

FVS-323 135.5 138.5 3.0 1.06

and 171.8 176.0 4.2 2.03

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Hole ID From (m) To (m) Length (m) Cu (%)

FVS-326 121.3 142.7 21.4 5.52

including 130.3 139.5 9.2 7.64

FVS-330 112.9 118.2 5.3 4.72

including 112.9 114.9 2.0 6.66

FVS-335 105.1 120.5 15.5 2.26

and 125.1 135.4 10.4 5.74

including 125.1 132.1 7.0 7.13

and 140.4 143.4 3.0 1.25

FVS-342 86.5 94.4 7.9 3.22

FVS-344 101.5 105.5 4.0 1.43

FVS-346 82.5 88.5 6.0 4.56

and 201.6 206.0 4.4 14.54

FVS-351 149.8 159.2 9.4 1.88

FVS-354 124.6 141.6 17.0 6.76

including 129.1 132.1 3.0 17.19

FVS-356 95.1 100.1 4.9 1.20

FVS-364 108.3 117.7 9.4 1.66

and 134.0 158.6 24.6 7.56

including 143.3 151.0 7.7 15.97

FVS-371 25.1 35.4 10.3 4.10

including 26.1 30.1 4.0 6.71

FVS-375 17.1 39.0 21.9 2.01

including 30.7 33.7 3.0 4.33

and 41.6 45.3 3.7 2.41

NSI indicates no significant intercept, based on cut-off grade of 0.68% copper. Drill holes were drilled from surface.

Holes not included are either pending assay results, have been included in a different section of this press release for

clarity of discussing drill results or were previously included in a prior press release. The length of intercept may not

represent the true width of mineralization. Values may not add up due to rounding. From, to and mineralized intercepts

are rounded to the nearest tenth of a meter.

Toboggan Central Expansion

Hole ID From (m) To (m) Length (m) Cu (%)

FVS-320 196.2 200.8 4.5 6.30

FVS-321 217.7 222.2 4.5 9.17

FVS-337 167.7 191.5 23.8 8.06

including 167.7 177.7 8.0 9.20

and 236.9 241.1 4.2 3.55

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Ero Copper Corp

Hole ID From (m) To (m) Length (m) Cu (%)

FVS-347* 173.3 185.7 12.4 1.97

including 180.8 185.7 4.9 2.74

and 196.6 206.0 9.4 10.47

FVS-355* 180.2 205.2 25.0 7.32

including 189.2 195.2 16.0 9.67

FVS-357* NSI NSI NSI NSI

FVS-366 209.9 217.5 7.5 12.74

including 213.9 217.5 3.5 15.13

and 238.3 242.8 4.5 3.96

FVS-385 71.0 83.9 12.9 3.70

including 73.0 79.0 6.0 4.86

FVS-401 40.1 59.6 19.5 7.76

including 49.1 53.1 4.0 9.97

NSI indicates no significant intercept, based on cut-off grade of 0.68% copper. Drill holes were drilled from surface.

Holes not included are either pending assay results, have been included in a different section of this press release for

clarity of discussing drill results or were previously included in a prior press release. The length of intercept may not

represent the true width of mineralization. Values may not add up due to rounding. From, to and mineralized intercepts

are rounded to the nearest tenth of a meter. (*) indicates a shallower intercept that also intersected the East Zone at

deeper depths, as referenced in the Vermelhos East Zone drill results table.

Vermelhos East Zone Extension

The Vermelhos East Zone discovery ( see press release dated September 25, 2018 for

announcement of the Vermelhos East Zone discovery) is located approximately 100 meters to the

east of mineralization comprising the main Vermelhos Mine orebodies and lies on the eastern side

of an intrusive body. The zone of mineralization, to date, has been delineated from surface copper

oxide mineralization to an interpreted depth of approximately 500 meters below surface.

During the period, result s from 15 drill holes were received th at highlight extensions of the

Vermelhos East Zone, as shown in the following table. These results are highlighted by drill hole

FVS-336 that intersected 5.0 meters grading 2.04% copper, hole FVS -339 that intercepted 5.5

meters at 1.22% copper and hole FVS-362 that intersected 11.1 meters grading 1.75% copper.

These holes continue to demonstrate continuity of the East Zone from surface to a depth of over

500 meters below surface . Drilling to extend the previously announced high-grade near-surface

portion of the East Zone (see press release dated December 11, 2018) is underway. Please see

Figure 1 for collar locations and Figure 2 for a north-south long section including the Vermelhos

East Zone.

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Hole ID From (m) To (m) Length (m) Cu (%)

FVS-313 152.8 157.9 5.2 0.83

FVS-336 540.6 545.6 5.0 2.04

FVS-339 434.1 439.7 5.5 1.22

FVS-347* 342.7 346.7 4.0 1.09

and 361.7 365.1 3.4 1.17

FVS-349 408.8 417.3 8.6 0.90

and 537.9 540.9 3.0 1.39

and 543.9 548.9 5.0 1.34

FVS-355* 398.7 413.4 14.7 1.72

and 452.7 457.9 5.2 1.72

FVS-357* NSI NSI NSI NSI

FVS-362 458.0 468.0 11.1 1.75

and 476.5 480.2 3.7 1.10

FVS-363 493.3 498.3 5.0 0.98

FVS-366 411.6 417.6 6.0 1.76

FVS-370 324.6 330.0 5.3 2.26

and 333.7 342.3 8.6 1.84

FVS-373 NSI NSI NSI NSI

FVS-374 NSI NSI NSI NSI

FVS-387 460.7 473.0 12.3 1.38

including 468.9 470.9 2.0 3.41

FVS-414** - 6.7 6.7 2.26

and** 23.0 29.9 6.9 3.00

and 119.8 124.0 4.2 0.71

and 133.6 139.3 5.6 3.97

NSI indicates no significant intercept, based on cut-off grade of 0.68% copper. Drill holes were drilled from surface.

Holes not included are either pending assay results, have been included in a different section of this press release for

clarity of discussing drill results or were previously included in a prior press release. T he length of intercept may

not represent the true width of mineralization. Values may not add up due to rounding. From, to and mineralized

intercepts are rounded to the nearest tenth of a meter. (*) indicates a deeper intercept that also intersected the main

Toboggan orebody at shallower depths, as referenced in the Toboggan drill results table. (**) indicates near-surface

intercept that includes oxide or transitional material.

Vermelhos West (N8)

The N8 D eposit, previously referred to as Vermelhos West, lies in the northern part of an

interpreted semi -continuous system , encompassing the Vermelhos Mine, the Vermelhos East

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Zone, the N8 deposit and new regional targets to the south and to the north of the Vermelhos Mine.

Drilling is underway to evaluate continuity and mineralized extent of the system as well as evaluate

the high-priority targets to the south of the mine.

During the period, four holes were drilled to test continuity of mineralization below the previously

defined resource model. Please see Figure 1 for collar locations and Figure 2 for a north -south

long section of the N8 Deposit and Vermelhos East Zone.

Hole ID From (m) To (m) Length (m) Cu (%)

FV-130 217.4 223.7 6.3 0.79

and 227.7 241.7 14.0 0.75

and 269.1 286.2 17.2 1.16

and 292.5 307.8 15.4 1.25

and 394.2 399.2 5.0 1.30

and 408.2 416.8 8.6 0.96

and 431.0 438.0 7.0 1.14

FV-131 245.0 249.1 4.2 1.28

and 277.9 282.9 5.0 1.64

and 290.6 295.6 5.0 1.79

and 301.9 309.2 7.4 1.17

and 382.3 387.3 5.0 0.89

and 395.0 402.0 7.0 1.12

FV-132 NSI NSI NSI NSI

FV-133 NSI NSI NSI NSI

NSI indicates no significant intercept, based on cut-off grade of 0.68% copper. Drill holes were drilled from surface.

Holes not included are either pending assay results, have been included in a different section of this press release for

clarity of discussing drill results or were previously included in a prior press release. T he length of intercept may

not represent the true width of mineralization.

PILAR DISTRICT

The Pilar District encompasses the area surrounding the Pilar underground mine, Caraíba M ill

complex and the past producing Pilar open pit and R22 Mines. 13 drill rigs are currently operating

within the District comprised of eight underground drill rigs and five surface drill rigs.

During the period, expansion and extensional drilling continued to focus on the West Limb and

Deepening Extension zones. Four underground and four surface drill rig s are currently

undertaking long -term exploration drilling focused on evaluating the extent of the West Limb

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