Combine graham cracker crumbs and sugar; pour over butter and mix well. Press into bottom of springform pan.
Cream the cream cheese, add sugar and beat well. Add eggs, beat until smooth. Combine pumpkin, salt and spices; blend well. Add pumpkin mixture to cream cheese slowly while stirring continuously. Pour over crust.
Drizzle over melted chocolate and run a knife through batter in a criss-cross motion to create a swirling pattern with the chocolate. Bake at 325 degrees for 50 to 60 minutes.