As per SEBI guidelines, Aluminium contracts from the month of March 2019 and Zinc contracts from the April 2019 will be physically settled. You can find the exchange circular here.
For the cash-settled contracts, we convert the LME Aluminium/Zinc spot price with the RBI Reference rates and arrive at the futures price in INR. But since the settlement type has changed to physical delivery, the cost of delivery increases the price of these contracts(Adding up Customs Duty, CIF, etc). Calculations of the parity/disparity due to physical delivery(Cost of Insurance, Freight, Customs Duty, etc) to arrive at the new spot price is explained in this thread
MCX has also released a separate spot market price for these physically settled contracts. You can find them here.
To answer your question, both the February and March contracts have to be treated separately and you can’t expect the spread to close up.
Also, Alumini contracts will remain to be cash-settled, hence, they will trade around the existing spot price.