东秦岭二郎坪群硅质岩热水沉积地球化学特征及其地质意义

冯胜斌

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东秦岭二郎坪群硅质岩热水沉积地球化学特征及其地质意义

冯胜斌

文章导航 > 沉积学报 > 2007 > 25(4): 564-573

冯胜斌. 东秦岭二郎坪群硅质岩热水沉积地球化学特征及其地质意义[J]. 沉积学报, 2007, 25(4): 564-573.

引用本文:

冯胜斌. 东秦岭二郎坪群硅质岩热水沉积地球化学特征及其地质意义[J]. 沉积学报, 2007, 25(4): 564-573.

FENG Shengbin. Geochemical Characteristics of Hydrothermal Cherts of Erlangping Group in East Qinling and Their Geologic Significance[J]. Acta Sedimentologica Sinica, 2007, 25(4): 564-573.

Citation:

FENG Shengbin. Geochemical Characteristics of Hydrothermal Cherts of Erlangping Group in East Qinling and Their Geologic Significance[J]. Acta Sedimentologica Sinica, 2007, 25(4): 564-573.

冯胜斌. 东秦岭二郎坪群硅质岩热水沉积地球化学特征及其地质意义[J]. 沉积学报, 2007, 25(4): 564-573.

引用本文:

冯胜斌. 东秦岭二郎坪群硅质岩热水沉积地球化学特征及其地质意义[J]. 沉积学报, 2007, 25(4): 564-573.

Citation:

东秦岭二郎坪群硅质岩热水沉积地球化学特征及其地质意义

冯胜斌

中国石油长庆油田分公司勘探开发研究院西安 710021

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冯胜斌

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Geochemical Characteristics of Hydrothermal Cherts of Erlangping Group in East Qinling and Their Geologic Significance

FENG Shengbin

Research Institute of Exploration and Development of Changqing Oilfield Company, PetroChina, Xi'an 710021

More Information

Corresponding author: FENG Shengbin

摘要

摘要: 二郎坪群硅质岩成因研究对二郎坪群的构造背景和铜多金属矿床成因的确定具有重要意义。通过对二郎坪群中三种硅质岩的地质特征和岩石地球化学分析，认为二郎坪群硅质岩是典型的热水沉积硅质岩。常量元素地球化学特征值（N(Al)/N（Al+Fe+Mn））指示该硅质岩的沉积环境存在东西差异，南阳盆地以东弧后盆地的规模较大（N(Al)/N（Al+Fe+Mn）=0.30~0.45），沉积环境类似远洋盆地，硅质岩的热液成分比例大，受陆缘物质影响小；而南阳盆地以西弧后盆地的规模较小（N(Al)/N（Al+Fe＋Mn）=0.59），沉积环境为近大陆的边缘海，硅质岩Al含量相对较高，受到陆缘物质影响相对大。地质特征和稀土元素特征（负Eu异常、弱负Ce异常）揭示了二郎坪群硅质岩是弧后盆地型低温热液流体和海水混合形成，这为二郎坪群形成于弧后盆地构造环境的认识提供了新的重要证据。热水沉积硅质岩与铜多金属矿床的共生关系证明研究区铜金属矿床的成因是海底热液喷流沉积作用。
- 东秦岭二郎坪群硅质岩热水沉积
Abstract: The genetic study of the cherts in Erlangping Group is the key to reveal copper polymetallic deposits genesis and tectonic setting of Erlangping Group.By studying the geological and geochemical characters of the three types of cherts in Erlangping Group in the east Qinling orogenic belt, it is believed that the cherts in Erlangping Group are hydrothermal sedimentogenic rocks. The major elements characteristic value (N(Al)/N（Al+Fe+Mn）) indicates that the cherts were formed in different marine environments .The cherts formed at the west of Nanyang basin were deposited in continental margin basin environment, but those formed at the east of Nanyang basin were deposited in pelagic environment and had a little of material from the continental margin. Comprehensive analysis of rare earth elements geochemistry(negative Eu ,Ce anomaly) and geologycharacteristics of the cherts show sthat the cherts of Erlangping Group are formed by the mixing of backarc basin type hydrothermal solutions of low temperature and seawater, so a new evidence is provided to determine the backarc basin tectonic setting of Erlangpin Group.The paragenetic relationship of hydrothermal sedimentogenic cherts and copper polymetallic deposits manifest that the copper polymetallic deposits are formed by the submarine hydrothermal exhalative lithogenesis and mineralization.
- East Qinling Mountain

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[1]	石太衡, 吴耿, 李荣. 硅质热泉沉积物的结构和微生物成矿成岩机制 . 沉积学报, 2020, 38(1): 113-123. doi: 10.14027/j.issn.1000-0550.2019.023
[2]	吴超伟, 侯明才, 黄虎, 周倩玉, 罗宏谓. 滇东南麻栗坡中—下二叠统硅质岩地球化学特征及地质意义 . 沉积学报, 2020, 38(1): 196-204. doi: 10.14027/j.issn.1000-0550.2020.2019.001
[3]	刘浩, 徐大良, 牛志军, 彭练红, 魏运许, 赵小明. 湖北竹山杨家堡组硅质岩成因及沉积环境分析 . 沉积学报, 2015, 33(6): 1087-1096. doi: 10.14027/j.cnki.cjxb.2015.06.003
[4]	. 西藏山南地区上三叠统复理石郎杰学群岩性分布样式及其意义 . 沉积学报, 2014, 32(1): 36-43.
[5]	. 滇东南丘北地区上二叠统吴家坪阶硅质岩地球化学特征及地质意义 . 沉积学报, 2013, 31(04): 621-629.
[6]	. 鄂西南利川二叠纪吴家坪组硅质岩成因及沉积环境 . 沉积学报, 2013, 31(04): 590-599.
[7]	. 秦皇岛地区奥陶纪硅质岩地球化学特征及沉积环境意义 . 沉积学报, 2011, 29(6): 1145-1155.
[8]	徐勇航. 华北陆块南部古元古代熊耳群硅质岩地球化学特征及其沉积环境 . 沉积学报, 2008, 26(4): 602-609.
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东秦岭二郎坪群硅质岩热水沉积地球化学特征及其地质意义

冯胜斌

中国石油长庆油田分公司勘探开发研究院西安 710021

通讯作者: 冯胜斌

收稿日期: 1900-01-01
修回日期: 1900-01-01
刊出日期: 2007-08-10

关键词:

东秦岭二郎坪群硅质岩热水沉积

摘要: 二郎坪群硅质岩成因研究对二郎坪群的构造背景和铜多金属矿床成因的确定具有重要意义。通过对二郎坪群中三种硅质岩的地质特征和岩石地球化学分析，认为二郎坪群硅质岩是典型的热水沉积硅质岩。常量元素地球化学特征值（N(Al)/N（Al+Fe+Mn））指示该硅质岩的沉积环境存在东西差异，南阳盆地以东弧后盆地的规模较大（N(Al)/N（Al+Fe+Mn）=0.30~0.45），沉积环境类似远洋盆地，硅质岩的热液成分比例大，受陆缘物质影响小；而南阳盆地以西弧后盆地的规模较小（N(Al)/N（Al+Fe＋Mn）=0.59），沉积环境为近大陆的边缘海，硅质岩Al含量相对较高，受到陆缘物质影响相对大。地质特征和稀土元素特征（负Eu异常、弱负Ce异常）揭示了二郎坪群硅质岩是弧后盆地型低温热液流体和海水混合形成，这为二郎坪群形成于弧后盆地构造环境的认识提供了新的重要证据。热水沉积硅质岩与铜多金属矿床的共生关系证明研究区铜金属矿床的成因是海底热液喷流沉积作用。

English Abstract

Geochemical Characteristics of Hydrothermal Cherts of Erlangping Group in East Qinling and Their Geologic Significance

FENG Shengbin

Research Institute of Exploration and Development of Changqing Oilfield Company, PetroChina, Xi'an 710021

Corresponding author: FENG Shengbin

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2007-08-10

Keywords:

East Qinling Mountain

Abstract: The genetic study of the cherts in Erlangping Group is the key to reveal copper polymetallic deposits genesis and tectonic setting of Erlangping Group.By studying the geological and geochemical characters of the three types of cherts in Erlangping Group in the east Qinling orogenic belt, it is believed that the cherts in Erlangping Group are hydrothermal sedimentogenic rocks. The major elements characteristic value (N(Al)/N（Al+Fe+Mn）) indicates that the cherts were formed in different marine environments .The cherts formed at the west of Nanyang basin were deposited in continental margin basin environment, but those formed at the east of Nanyang basin were deposited in pelagic environment and had a little of material from the continental margin. Comprehensive analysis of rare earth elements geochemistry(negative Eu ,Ce anomaly) and geologycharacteristics of the cherts show sthat the cherts of Erlangping Group are formed by the mixing of backarc basin type hydrothermal solutions of low temperature and seawater, so a new evidence is provided to determine the backarc basin tectonic setting of Erlangpin Group.The paragenetic relationship of hydrothermal sedimentogenic cherts and copper polymetallic deposits manifest that the copper polymetallic deposits are formed by the submarine hydrothermal exhalative lithogenesis and mineralization.

冯胜斌. 东秦岭二郎坪群硅质岩热水沉积地球化学特征及其地质意义[J]. 沉积学报, 2007, 25(4): 564-573.

引用本文:

冯胜斌. 东秦岭二郎坪群硅质岩热水沉积地球化学特征及其地质意义[J]. 沉积学报, 2007, 25(4): 564-573.

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东秦岭二郎坪群硅质岩热水沉积地球化学特征及其地质意义

通讯作者:
冯胜斌

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Geochemical Characteristics of Hydrothermal Cherts of Erlangping Group in East Qinling and Their Geologic Significance

Corresponding author: FENG Shengbin

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东秦岭二郎坪群硅质岩热水沉积地球化学特征及其地质意义

中国石油长庆油田分公司勘探开发研究院西安 710021

通讯作者: 冯胜斌

English Abstract

Geochemical Characteristics of Hydrothermal Cherts of Erlangping Group in East Qinling and Their Geologic Significance

Research Institute of Exploration and Development of Changqing Oilfield Company, PetroChina, Xi'an 710021

Corresponding author: FENG Shengbin

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东秦岭二郎坪群硅质岩热水沉积地球化学特征及其地质意义

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Geochemical Characteristics of Hydrothermal Cherts of Erlangping Group in East Qinling and Their Geologic Significance

Corresponding author: FENG Shengbin

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东秦岭二郎坪群硅质岩热水沉积地球化学特征及其地质意义

中国石油长庆油田分公司 勘探开发研究院 西安 710021

通讯作者: 冯胜斌

English Abstract

Geochemical Characteristics of Hydrothermal Cherts of Erlangping Group in East Qinling and Their Geologic Significance

Research Institute of Exploration and Development of Changqing Oilfield Company, PetroChina, Xi'an 710021

Corresponding author: FENG Shengbin

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冯胜斌

中国石油长庆油田分公司勘探开发研究院西安 710021