广西大瑶山大裕金矿地质特征及找矿预测

doi:10.11872/j.issn.1005-2518.2020.01.158

Abstract

Abstract:

Dayu gold deposit is located in the Gupao metallogenic zone of the Dayaoshan metallogenic belt in Guangxi Province.The structural unit belongs to the Guizhong-Guidong platform depression，east part of Dayaoshan uplift，south part of Gupao compound syncline，where is favorable for mineralization.However，the prospecting work in this area has been restricted by the insufficient understanding of metallogenic regularity.In this paper，we studied the Dayu deposit as a typical deposit in the metallogenic belt.Based on the detailed analysis of the geological characteristics of the gold deposit，combined with the drilling data and the microscopic characteristics of the ore，the ore-controlling factors and metallogenic regularities of the gold mineralization in this area were analyzed.The main ore-controlling structures in this area are NEE-trending faults，F₁ and F₂，and the ore-bearing wall rocks are the Cambrian Xiaoneichong Formation and Huangdongkou Formation，which are mainly composed of shallow metamorphic carbonaceous fine clastic rocks.Wall rock alteration mainly includes silicification and pyritization or sericitization-pyritization-silicification combination alteration.It is suggested that the future gold prospecting works in this area should combine geophysical and geochemical exploration work，and it is necessary to pay attention to silicification，pyritization，sericite，hydromica，chlorite and other wall rock alteration that closely related to gold mineralization.It is proposed to carry out prospecting work at NE-NEE trending faults and its restricted areas as well as intersecting parts.

Key words: geological characteristics, prospecting prognosis, metallogenic regularity, Dayu gold deposit, Dayaoshan gold metallogenic belt, Guangxi

CLC Number:

P618.51

Hui GUO,Chunming LIU,Dezhi HUANG,Haiyang ZOU,Lei CHEN. Geological Characteristics and Prospecting Prognosis of the Dayu Gold Deposit in Dayaoshan，Guangxi[J].Gold Science and Technology, 2020, 28(1): 12-20.

Figures/Tables 6

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矿体编号	矿体形态	矿体产状/（°）		矿体规模/m		平均真厚度/m	厚度变化系数/%	平均品位/（×10^-6）	控制勘探线	金资源量/kg
矿体编号	矿体形态	倾向	倾角	走向长	最大斜深	平均真厚度/m	厚度变化系数/%	平均品位/（×10^-6）	控制勘探线	金资源量/kg
Ⅰ-1	似层状	172	65	260	177	4.19	113.5	10.36	7~2线	3 550.20
Ⅰ-2	似层状	172	53	220	157	2.64	16.0	3.93	12~20线	3 550.20
Ⅱ-1	似层状	172	65	380	325	5.10	166.3	5.07	15~0线	2 821.04
Ⅱ-2	似层状	172	53	220	359	1.36	11.8	3.23	12~20线	2 821.04
Ⅲ	似层状	172	52	760	228	1.00	158.6	7.13	15~20线	1 580.04
Ⅳ	透镜状	172	52	400	203	1.01	206.7	1.95	0~20线	116.43
Ⅴ-1	透镜状	172	52	260	368	1.55	-	2.38	0~7线
Ⅴ-2	透镜状	172	52	220	305	1.09	-	4.07	12~20线
Ⅵ-1	豆荚状	172	52	40	50	1.91	-	5.28	7线
Ⅵ-2	豆荚状	172	52	40	50	1.89	-	3.52	0线
Ⅵ-3	豆荚状	172	52	40	50	1.26	-	6.10	20线
Ⅶ-1	透镜状	172	52	240	50	0.73	-	5.59	7~2线
Ⅶ-2	透镜状	172	52	40	50	1.26	-	4.53	20线

Geological Characteristics and Prospecting Prognosis of the Dayu Gold Deposit in Dayaoshan，Guangxi

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