Prepare grill for direct-heat cooking with medium-hot charcoal placing the charcoal on one side of the grill.
Stir together all ingredients except pork chops in a bowl to form spice paste, then rub paste all over pork chops.
Cover pork chops with plastic wrap and allow them to marinate, covered and chilled for two hours. 20 minutes before grilling take chops out of the refrigerator.
Light the grill and once it is ready oil the grill rack. Grill the chops over coals, turning over occasionally and moving them around if flare-ups occur, until browned, 2 to 3 minutes total.
Move chops to area with no coals underneath then cover with inverted roasting pan and grill, turning chops over once, until thermometer inserted horizontally into center of a chop (do not touch bone) registers 145F, 8 to 10 minutes.
Transfer to a platter and let stand 5 minutes before serving.