Application of the Gravity and Magnetic Method to the Exploration of the Eastward Extending M-15 Anomaly of the Jinchuan Copper-Nickel Deposit, Gansu Provinceoft-com:office:office" />
The M-15 magnetic anomaly(Dongwan anomaly) is a key prognostic area for copper and nickel deposits, to which geologists both in China and abroad have paid close attention. As this anomaly lies in a fully covered area, previous researchers considered it to be caused by an ultrabasic body. Using the gravity and magnetic method to compare it with the magnetic anomaly related to the known Baijiazui ultrabasic body, the authors have reached the following conclusions: The M-15 anomaly is a noncognate gravity and magnetic anomaly characterized by combinational magnetic high and gravity low and a rather large buried depth; the magnetic anomaly might result from the ultrabasic rock below 1 oft-com:office:smarttags" />