Exhibit 99.1
JOINT FILING AGREEMENT
The undersigned acknowledge and agree that the foregoing Amendment No. 1 to Schedule 13D is filed on behalf of each of the undersigned and that all subsequent amendments to such statement shall be filed on behalf of each of the undersigned without the necessity of filing additional joint filing agreements. This agreement may be included as an exhibit to such joint filing.
Dated: July 17, 2018
| RCA VI GP LTD. | |||
| By: | /s/ Sherri Croasdale | ||
| Name: | Sherri Croasdale | ||
| Title: | Vice President and CFO | ||
| RESOURCE CAPITAL ASSOCIATES VI L.P. | |||
| By: | RCA VI GP Ltd., its General Partner | ||
| By: | /s/ Sherri Croasdale | ||
| Name: | Sherri Croasdale | ||
| Title: | Vice President and CFO | ||
| RESOURCE CAPITAL FUND VI L.P. | |||
| By: | Resource Capital Associates VI L.P., its General Partner | ||
| By: | RCA VI GP Ltd., its General Partner | ||
| By: | /s/ Sherri Croasdale | ||
| Name: | Sherri Croasdale | ||
| Title: | Vice President and CFO | ||
| RCF VI CAD LLC | |||
| By: | /s/ Sherri Croasdale | ||
| Name: | Sherri Croasdale | ||
| Title: | President | ||
