Rock magnetic property of gravity core CSH1 from the northern Okinawa Trough and the effect of early diagenesis
文献类型：期刊论文
| 作者 | Ge Shulan; Shi Xuefa; Wu Yonghua; Lee, Tehquei; Xiong Yingqian; Saito, Yoshiki |
| 刊名 | ACTA OCEANOLOGICA SINICA
 |
| 出版日期 | 2007 |
| 卷号 | 26期号:5页码:54-65 |
| 关键词 | northern Okinawa Trough gravity core of CSH1 rock magnetic property characteristic tephra early diagenesis |
| ISSN号 | 0253-505X |
| 文献子类 | Article |
| 英文摘要 | Detailed rock magnetic investigations were undertaken at 2 similar to 4 cm interval for the gravity core CSH1 (with a length of 17.36 m) from the northern Okinawa Trough. Time-scale of the core was constructed by two characteristic tephras and foraminferal assemblages, indicating an age of 50 ka for the bottom of the core. Except for three tephras and abrupt decrease in surface, there are little changes in all kinds of rock magnetic parameters that can be correlated to the climate change for the last 50 ka. Different from the common sediments, most S-ratios (S equals the negative ratio of IRM to SIRM, which is an indicator of low coercivity content) of the sediments are smaller than 0.9, which implies a substantial amount of magnetic minerals with high coercivity. The existence of iron sulphide (greigite or pyrrhotite) is revealed by representative susceptibility - temperature curves showing 200 similar to 350 degrees C Curie temperature in addition to 580 degrees C of magnetite, and also by awful smell during heating and dark heating products. Both the occurrence of authigenic iron sulphide and quick decrease of magnetic parameters near the surface clearly show that sediments from Core CSH1 have undergone early diagenesis. The featureless magnetic changes of the whole core except for three tephras mean that the post-depositonal alteration is so strong that most original signals have been destroyed. For the same reason, the organic matter in sediment and sulphate in pore water must have been consumed along with dissolution, precipitation of iron and manganese happening sequencially during the redox reaction series. Great caution must be taken when using these altered chemical parameters for the interpretation of climatic changes. |
| WOS关键词 | CALIFORNIA CONTINENTAL BORDERLAND ; MARINE-SEDIMENTS ; PACIFIC-OCEAN ; NEW-ZEALAND ; MINERALS ; SEA ; ATLANTIC ; RECORD ; JAPAN ; IRON |
| WOS研究方向 | Oceanography |
| 语种 | 英语 |
| WOS记录号 | WOS:000251102700006 |
| 出版者 | SPRINGER |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/68379]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Shi Xuefa |
| 作者单位 | 1.State Ocean Adm, Inst Oceanog 1, Marine Sedimentat & Environm Geol Key Lab, Qingdao 266061, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Inst Earth Sci, Taipei, Taiwan 4.Geol Survey Japan, Tsukuba, Ibaraki 3068567, Japan |
| 推荐引用方式 GB/T 7714 | Ge Shulan,Shi Xuefa,Wu Yonghua,et al. Rock magnetic property of gravity core CSH1 from the northern Okinawa Trough and the effect of early diagenesis[J]. ACTA OCEANOLOGICA SINICA,2007,26(5):54-65. |
| APA | Ge Shulan,Shi Xuefa,Wu Yonghua,Lee, Tehquei,Xiong Yingqian,&Saito, Yoshiki.(2007).Rock magnetic property of gravity core CSH1 from the northern Okinawa Trough and the effect of early diagenesis.ACTA OCEANOLOGICA SINICA,26(5),54-65. |
| MLA | Ge Shulan,et al."Rock magnetic property of gravity core CSH1 from the northern Okinawa Trough and the effect of early diagenesis".ACTA OCEANOLOGICA SINICA 26.5(2007):54-65. |
入库方式： OAI收割
来源：地质与地球物理研究所
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