甘肃北山拾金坡——南金滩地区水系沉积物地球化学特征及找矿远景

王磊; 杨建国; 王小红; 齐琦; 李文明; 姜安定; 张洲远

甘肃北山拾金坡——南金滩地区水系沉积物地球化学特征及找矿远景

中国地质调查局西安地质调查中心, 国土资源部岩浆作用成矿与找矿重点实验室, 陕西西安 710054

基金项目:

中国地质调查局地质调查项目(12120113046700)及国家重大科学仪器设备开发专项(2011YQ05006012)联合资助.

详细信息

作者简介:
王磊,男,1985年生,硕士生,工程师,主要研究方向:矿产地质勘查;E-mail:tleiwang@163.com.

通讯作者:
杨建国,男,1962年生,研究员,主要研究方向:成矿规律及找矿

中图分类号: P622;P624;P632
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出版历程
- 收稿日期: 2015-03-18
- 修回日期: 2015-05-31
- 网络出版日期: 2023-09-26
- 刊出日期: 2016-04-24

Geochemical characteristics of stream sediments and prospecting direction in the Shijinpo-Nanjintan area of Beishan, Gansu Province

Key Laboratory for the Study of Focused Magmatism and Giant Ore Deposits, MLR, Xi'an Institute of Geology and Mineral Resources, Xi'an 710054, Shaanxi, China

Funds:

Supported by China Geological Survey Program (No. 12120113046700) and National Key Scientific Apparatus Development of Special Item (No. 2011YQ05006012).

摘要

摘要: 依据甘肃北山拾金坡-南金滩地区1:5万水系沉积物测量成果,研究了区内元素分布、单元素异常及异常元素组合特征,共圈出11处综合地球化学异常,结合异常所处的地质特征,划分为4类11处成矿远景区。第一类综合异常处于中酸性侵入岩区,与断裂构造密切相关,以Au为主成矿元素,是寻找蚀变岩型和石英脉型金矿的有利地区;第二类综合异常处于蓟县系平头山组地层区,是寻找喷流沉积型铅锌矿、铁矿及矽卡岩型多金属矿的有利地区;第三类综合异常处于敦煌群地层出露区,是寻找变质热液型金矿的有利地区;第四类综合异常与基性-超基性杂岩体有关,是寻找铜镍矿的有利地区。
- 水系沉积物测量 /
- 综合异常 /
- 找矿远景区 /
- 拾金坡-南金滩 /
- 甘肃北山
Abstract: Based on the result of the stream sediment survey in Shijinpo-Nanjintan area of Gansu Province, the authors studied the characteristics of the elements distribution, the single element anomaly and the element assemblage. According to the distribution of element anomalies, the types of assemblages and theanomaly controlling factors, thestudy area is subdivided into 11 anomalous zones. The eleven anomalous zones can be further divided into four types: the first kind of anomalies is related to the intermediate acid intrusive rocks and the fracture structures, and Au is the main metallogenic element. The anomalous zones are the potential areas of quartz vein type and broken belt type gold deposits. The second type of the anomalies is related to the formation of the Jixian system, and these anomalous zones are the important potential areas of Pb, Zn, Fe and polymetallic deposits. The third type of the anomalous zones is related to the Dunhuang system, and the anomalous zones are potential areas of metamorphic hydrothermal type gold deposits. The fourth type of the anomalous zones is related to the intrusion of basic-ultrabasic complex, and the anomalous zones are the potential areas of magmatic liquation Cu-Ni sulfide deposits.
- stream sediments /
- prospecting direction /
- Shijinpo-Nanjintan area /
- Beishan in Gansu Province /
- undefined

HTML全文

图甘肃北山拾金坡—南金滩地区综合异常划分图 1—第四系; 2—古近-新近系; 3—新近系; 4—奥陶系; 5—蓟县系; 6—敦煌群; 7—超基性杂岩; 8—海西中期花岗岩; 9—海西中期斑状花岗岩; 10—海西中期花岗闪长岩; 11—辉绿岩脉; 12—闪长岩脉; 13—英安斑岩脉; 14—石英脉; 15—花岗岩脉; 16—断裂; 17—综合异常及编号; 18—矿床(点)

图1

Figure Comprehensive anomalies and prospective area of the study area 1-Quaternary; 2-Paleogene-Neogene; 3-Neogene; 4-Ordovician; 5-Jixianian System; 6-Dunhuang Group; 7-Ultrabasic complex; 8-Middle hercynian granite; 9-Middle hercynian porphyritic granite; 10-Middle hercynian granodiorite; 11-Diabase vein; 12- Diorite vein; 13-Dacite porphyry vein; 14-Quartz vein; 15-Granite vein; 16-Fault; 17-Synthetic anomaly; 18-Deposit (ore spot)

Fig.1

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图研究区15 种元素变化系数解释分异程度图

图2

Figure Differentiation degree explanation from variation coefficients of 15 elements in the study area

Fig.2

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图金坡—南金滩地区水系沉积物元素R型聚类分析谱系图

图3

Figure Cluster analysis diagram of elements from stream sediments in Shijinpo−Nanjintan area

Fig.3

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图甘肃北山拾金坡—南金滩地区HS−8(a)和HS−10(b)综合异常区Au元素异常解析图 1—海西中期斑状花岗岩; 2—辉绿岩脉; 3—闪长岩脉; 4—石英脉; 5—金矿床; 6—金元素极大值

图4

Figure Anomaly resolution map of No. HS−8 (a) and HS−10 (b) in Shijinpo−Nanjintan area, Beishan Mountain, Gansu Province 1-Middle Hercynian porphyritic granite; 2-Diabase dykes; 3-Diorite vein; 4-Quartz vein; 5-Gold deposit; 6-Maximum of Au

Fig.4

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水系沉积物样品元素分析检出限要求

The element detection limit of the stream sediment samples

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甘肃北山拾金坡—南金滩地区不同地质单元元素背景值统计

Background values of different elements in different geological units in Shijinpo-Nanjintan area, Beishan, Gansu Province

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拾金坡—南金滩地区水系沉积物指示元素地球化学参数

Geochemical parameters of stream sediments in Shijinpo−Nanjintan area

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