| 黄标,刘孝善.河北小寺沟斑岩钼(铜)矿床稳定同位素研究[J].地质找矿论丛,1989,(4):55-61 |
| 河北小寺沟斑岩钼(铜)矿床稳定同位素研究 |
| STABLE ISOTOPE STUDIES OF THE XIAOSHIGOU PORPHYRY-TYPE MOLYBDENUM (COPPER) ORE DEPOSIT PINGQUAN COUNTRY, HEBEI PROVINCE |
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| DOI：10.6053/j.issn.1001-1412.1989.4. 006 |
| 中文关键词: 斑岩钼(铜)矿床 稳定同位素 河北 |
| 英文关键词: |
| 基金项目:国家自然科学基金 |
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| 中文摘要: |
| 本文研究了小寺沟斑岩钼(铜)矿床锶、氧、氢、碳、硫等稳定同位素组成特征,指出该矿床成矿岩体属同熔型花岗岩,岩浆来源于下地壳或上地幔,并受上地壳物质混染;成矿流体中的水,以岩浆水为主,至晚期有大气降水的混入;碳主要来源于蓟县系雾迷山组,海相沉积碳酸盐;硫与锶属于深源. |
| 英文摘要: |
| The Xiaoshigou porphyry-type molybdenum (copper) ore deposit consists of inner belt (Mo ore-body) and outer belt (Cu ore-body) of contact belt which is between the granodiorite stock and the Precambrian carbonate rocks.The granodiorite has isochron age of 124 + 1.9 Ma and the initial 87Sr/86Sr ratio of 0.7064, which indicates that this stock belongs to syntex type granite and originates from lower crust or upper mantle and contaminates upper crustal materials.The δ18OH20 of the hydrothermal fluids calculated and the D of water in inclusions indicate that ore-forming fluids mainly contained magmatic water and mixed into the meteoric water in late stge. The δ13C of the ore deposit have a relatively narrow range and the values of almost zero which are analogous to that of country rocks (marine sedimental carbonate rocks, Wumishan Formation, Jixian Series), therefore, carbon in the ore deposit originated from country rocks. The δ34S of various sulfides that are small positive values (+0.7 ～ +3.9‰), and have narrow range indicate that sulfur was derived from a deep seated ignous source. |
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