Margin selling on Monday, which may continue into Tuesday, tank gold market hard, but it is not just gold that tank. Panic selling spread to many asset classes including stocks and commodities because traders who suffered losses in their gold trade has to sell whatever they own in order to meet their margin call.
Next Support Levels are $1,345 then $1,290, but keep in mind that during a major liquidation selling could slice through support levels without pausing.