Trên cơ sở kết quả nghiên cứu đặc điểm thạch học - khoáng vật, đặc điểm cấu trúc kiến tạo, địa hóa các nguyên tố chính và nguyên tố vết của đá gốc, đá biến đổi, quặng, đất, địa hóa khoáng vật, khoáng tướng, bao thể đã xác định nguồn gốc thành tạo quặng liên quan với granit có tính oxy hóa và quá trình biến chất trao đổi kiểu skarnoid ở trường quặng đồng Kon Rá. | 12 Journal of Mining and Earth Sciences Vol. 62 Issue 5 2021 12 - 28 Geochemical - geology characteristics implicating original sources and copper - deposit type in Kon Ra ore - field Niem Van Nguyen 1 Dung Tien Nguyen 2 Duan Tran 2 Tu Trong Mai 3 Nguyen Duc Do 1 Hieu Cong Duong 1 Viet Huu Bui 1 Thanh Hung Pham 1 1 Department of Geochemistry and Environment Vietnam Institute of Sciences and Mineral Resources Vietnam 2 South Vietnam Geological Mapping Division Vietnam 3 General Department of Geology and Minerals in Viet Nam Vietnam ARTICLE INFO ABSTRACT Article history Based on the research results on petrographic - mineralogical Received 18th June 2021 characteristics tectonic structural features geochemistry of major and Accepted 29th Aug. 2021 trace elements of the bedrock alternative rock ore soil mineralogical Available online 31st Oct. 2021 geochemistry mineral facies inclusions the origin of ore formation related Keywords to oxidized granite and skarnoid - typed metasomatic process in Kon Ra Cooper deposit type. copper ore field have been identified. Petrological and mineral characteristics indicate the process of transitional metasomatism between Geochemistry - geology the skarn and hornfels also known as bimetasomatic stage skarnoid Kon Ra deposit type . Diopxite represents the Progade skarnoid stage. Tremolite Skarnoid. actinolite quartz chlorite magnetite molybdenite less of chalcopyrite pyrrhotite and pyrite indicate the retrogade skarnoid stage. The following is sulfide - quartz stage major minerals include quartz chalcopyrite pyrite pyrrhotite molybdenite . This result is also consistent with the formation temperature 210 270 0C and the geochemical zoning of elements from intrusive blocks through the outer contact zone that contains the ore and surrounding rocks are as follows Cu Zn Ca the zone has lime-rich formations Fe3 Mo increases in the outer contact zone containing ore closed to acid intrusive rocks. Inversely the ratios of Pb Cu Zn Cu and As .
