التفاصيل البيبلوغرافية
| العنوان: |
内蒙古自治区大型金矿地球化学标志与预测. (Chinese) |
| Alternate Title: |
The Geochemical Indicator and Prognosis of Large Gold Ore Districts in Inner Mongolia. (English) |
| المؤلفون: |
周建, 徐善法, 聂兰仕, 刘东盛, 韩志轩, 柳青青, 张必敏, 刘汉粮, 迟清华 |
| المصدر: |
Acta Geoscientica Sinica; Nov2020, Vol. 41 Issue 6, p818-826, 9p |
| Abstract (English): |
The 1:1 000 000 gold geochemical map in Inner Mongolia was compiled, based on the datasets of 1:200 000 Regional Geochemistry-National Reconnaissance Program (RGNR) and 1:1 000 000 China–Mongolia Geochemical Mapping Project which was carried out across the boundary regions. The large gold ore deposits have a good relationship with gold geochemical anomalies. Geochemical indicators based on the four large gold ore deposits in Inner Mongolia show the following features: (1) 3-level nested geochemical anomalies occur around the large deposits, i.e., a geochemical province containing regional anomalies and local concentration centers; (2) The gold anomaly area is usually larger than 1000 km² ; (3) The gold anomaly contrast is higher than 2.2; (4) There are Ag, As, Sb, Bi, Hg geochemical anomalies in general; (5) There are regional deep faults and secondary faults in the gold anomaly area or its periphery; (6) There are generally igneous rocks in the gold anomaly area or its periphery. Finally, 14 large-size gold metallogenic prospective areas were delineated based on the geochemical indicators, regional geology and tectonic setting. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
利用 1:20 万区域化探扫面数据和中蒙边界 1:100 万地球化学填图数据编制了内蒙古自治区 1:100 万 金地球化学图, 发现内蒙古已知大型金矿与地球化学异常具有良好的对应关系。以内蒙古四个典型大型金矿 为例, 建立了 1:100 万尺度大型金矿地球化学预测指标: (1)异常具有 3 层套合结构, 即局部异常被区域异常所 包裹, 区域异常被地球化学省所包裹; (2)异常面积通常大于 1 000 km² ; (3)地球化学块体的异常衬度大于 2.2; (4)常伴生有 Ag、As、Sb、Bi 等元素的异常; (5)异常区或周边常具有区域性深大断裂及其次级断裂等构造; (6)异常区或周边一般发育有火成岩。根据建立的大型金矿预测指标, 圈定了大型金矿集区 14 个, 为下一步在 内蒙古选择重点地区开展大型金矿勘查提供了远景区。 [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
