"The Chief Minister has sacked Gayatri Prajapati and a letter for the same has been sent to Raj Bhavan," a senior officer told PTI.
Yadav was said to be unhappy with the minister who was mired in controversy over allegations of promoting illegal mining.
The opposition, however, alleged that the sacking of the minister was just an eyewash to hide the corruption in mining sector.
The HC on September 9 rejected an application by the state government for withdrawal of its order.
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"Illegal mining is rampant in the state and it is an open secret that he was promoting it. Now when the HC has taken serious view of the matter and ordered CBI probe, the CM's decision is mere an eyewash. It will not help as people know the reality," Congress leader Rita Bahuguna Joshi said.
"Our party has been raising the matter of illegal mining in the state. The decision should have been taken earlier," Pathak said.
Prajapati began as Minister of State for Irrigation in February 2013 and was moved to the lucrative berth of mining, directly under Yadav who handled that portfolio.
In July 2013, Yadav elevated Prajapati to MoS (Independent Charge) and in January 2014, he was made a Cabinet Minister.