Early Yanshanian intrusions are mainly adamellite,biotite K-feldspar granite with small amount of granodiorite.

 
  • 燕山早期侵入巖以二長(cháng)花崗巖、黑云鉀長(cháng)花崗巖為主,其次為花崗閃長(cháng)巖。
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