that period and are now being held for short-term sale. We recorded $0.3 million related to care and maintenance for the three-month period ended June 30, 2023, respectively, for expenses related to care and maintenance at our Velardeña Properties as the result of the suspension of mining and processing activities in November 2015.
El Quevar project expense. We incurred $0.2 million and $0.2 million for the three-month periods ended June 30, 2024 and 2023, respectively, related to holding and evaluation costs for the Yaxtché deposit at our El Quevar project in Argentina. During the three months ended June 30, 2024 and 2023, approximately $0.0 million and $0.1 million, respectively, of costs actually incurred were offset by reimbursements from Barrick.
Administrative expense. Administrative expenses totaled $1.1 million and $1.2 million for the three months ended June 30, 2024 and 2023, respectively. Administrative expenses, including costs associated with being a public company, are incurred primarily by our corporate activities in support of the Yoquivo Property, Rodeo Property, Velardeña Properties, El Quevar project and our exploration portfolio.
Stock-based compensation. During the three months ended June 30, 2024 and 2023, we incurred approximately $0.2 million and $0.0 million, respectively, of expense related to stock-based compensation. Stock-based compensation varies from period to period depending on the number and timing of shares granted, the type of grant, the market value of the shares on the date of grant and other variables.
Reclamation and accretion expense. During each of the three months ended June 30, 2024 and 2023, we incurred approximately $0.1 million of reclamation expense related to the accretion of an asset retirement obligation at the Velardeña and Rodeo properties.
Other operating income (loss), net. We recorded $2.1 million of net other operating income for the three months ended June 30, 2024 primarily related to the sale of the Velardeña mine, sulfide plant and related equipment in connection with the cessation of operations at the Velardeña Properties. In June, the underlying value of the Velardeña oxide plant and water wells was written down to its salvage amount which is equal to the amount of the deposits received from the Buyer through June 30, 2024 on the sale of the oxide processing plant and water wells and is recorded in current liabilities as deferred revenue (see Note 3 above). For the three months ended June 30, 2023, we recorded $0.1 million of net other operating income.
Depreciation, depletion and amortization. During each of the three months ended June 30, 2024 and 2023, we incurred depreciation, depletion and amortization expense of approximately $0.1 million.
Interest and other expense, net. We recorded a nominal amount of interest and other expense, net for each of the three months ended June 30, 2024 and 2023.
(Loss) gain on foreign currency losses. During the three months ended June 30, 2024, we recorded $0.1 million of foreign exchange losses. During the three months ended June 30, 2023, we recorded a nominal amount of foreign exchange gains. Foreign currency gains and losses are primarily related to the effect of currency fluctuations on monetary transactions incurred by our foreign subsidiaries that are denominated in currencies other than U.S. dollars.
Income taxes. We recorded a zero tax expense for the three months ended June 30, 2024. We recorded a $51,000 income tax benefit for the three months ended June 30, 2023.
Six Months Ended June 30, 2024
Revenue from the sale of metals. During the six months ended June 30, 2024, all revenue was generated from the Velardeña properties. The Velardeña operations produced three types of concentrate, and also generated revenue from slag sales. During the six months ended June 30, 2023, the Rodeo operations sold mainly doré. We also sold slag remaining from previous doré sales and doré production at Plant 2.
| ● | Concentrate Sales – We recorded $1.3 million in the six months ended June 30, 2024 from the sale of gold-rich pyrite concentrate, silver-rich lead concentrate and zinc concentrate. We recorded $1.2 million from the sales of concentrate in the six months ended June 30, 2023. |