| ชื่อเรื่อง | : | Insights from stable S and O isotopes into biogeochemical processes and genesis of Lower Cambrian barite–pyrite concretions of South China |
| นักวิจัย | : | Goldberg, T. , Mazumdar, A. , Strauss, H. , Shields, G. |
| คำค้น | : | Sulphur isotope , oxygen isotopic |
| หน่วยงาน | : | National Institute Of Oceanography (NIO), India |
| ผู้ร่วมงาน | : | - |
| ปีพิมพ์ | : | 2549 |
| อ้างอิง | : | Organic Geochemistry, vol.37, 1278-1288p. , http://drs.nio.org/drs/handle/2264/491 |
| ที่มา | : | - |
| ความเชี่ยวชาญ | : | - |
| ความสัมพันธ์ | : | - |
| ขอบเขตของเนื้อหา | : | - |
| บทคัดย่อ/คำอธิบาย | : | Pyrite bearing barite concretions are abundant in black shales of the Early Cambrian Niutitang formation in China. Their occurrence is connected with low sedimentation rates. Sulphur and oxygen isotopic compositions of barite display highly enriched values, averaging in 68±5‰ and 20±1‰, respectively. Pyrite sulphur has an isotopic composition of ~10‰. The elevated isotopic compositions, no systematic difference in isotopic composition throughout the concretions, and presumably low sulphate concentrations during deposition indicate late diagenetic barite precipitation at an advanced stage of bacterial sulphate reduction. During concentric growth from concretion centre to margin different Ba+ and SO4 2- bearing fluids interacted at different times, which resulted in non uniformly spread d34S and d18O values throughout the concretions. |
| บรรณานุกรม | : |
Goldberg, T. , Mazumdar, A. , Strauss, H. , Shields, G. . (2549). Insights from stable S and O isotopes into biogeochemical processes and genesis of Lower Cambrian barite–pyrite concretions of South China.
: National Institute Of Oceanography (NIO), India. Goldberg, T. , Mazumdar, A. , Strauss, H. , Shields, G. . 2549. "Insights from stable S and O isotopes into biogeochemical processes and genesis of Lower Cambrian barite–pyrite concretions of South China".
: National Institute Of Oceanography (NIO), India. Goldberg, T. , Mazumdar, A. , Strauss, H. , Shields, G. . "Insights from stable S and O isotopes into biogeochemical processes and genesis of Lower Cambrian barite–pyrite concretions of South China."
: National Institute Of Oceanography (NIO), India, 2549. Print. Goldberg, T. , Mazumdar, A. , Strauss, H. , Shields, G. . Insights from stable S and O isotopes into biogeochemical processes and genesis of Lower Cambrian barite–pyrite concretions of South China. : National Institute Of Oceanography (NIO), India; 2549.
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