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Acta Geologica Sinica(English Edition) 2025年第1期99卷 159-176页

作者： CHEN Sirui XIAN Benzhong JI Youliang LI Jiaqi State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing 102249China College of Geosciences China University of Petroleum(Beijing)Beijing 102249China School of Energy Resources China University of GeosciencesBeijing 100083China

This study focuses on tuffaceous clastic rocks of the Lower Cretaceous Qingshuihe Formation in the southern margin of Junggar *** aims to explore the influence of sedimentation and parent rock on this kind of reservoir *** results show that the tuffaceous components formed by the denudation of ultramafic and mafic rocks can transform into chlorite coating or hematite,while those from intermediate rock denudation can be dissolved or transformed into *** facies and lithofacies are essential in controlling the evolutionary result of tuffaceous ***-supported medium conglomerate and grain-supported medium-fine conglomerate that developed in the fan delta plain,with a closed original geochemical systems,have been in the oxidizing environment for a long *** tuffaceous matrices mainly transforms into hematite or *** minerals occupy the primary pores and are difficult to dissolve by felsic fluids,which inhibits the development of high-quality *** grain-supported sandy fine conglomerate developed in the fan delta front was in the underwater reductive environment with an open original geochemical *** tuffaceous matrices not only can transform into chlorite coating to strengthen the particle's compaction resistance,but also can be fully dissolved,which promotes the formation of high-quality reservoirs.

关键词： sedimentation parent rock tuffaceous clastic rock Lower Cretaceous southern margin of Junggar Basin

Detrital K-feldspar^(40)Ar/^(39)Ar Ages:Source Constraints of the Lower Miocene Sandstones in the Pearl River Mouth Basin,South China Sea

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Acta Geologica Sinica(English Edition) 2012年第2期86卷 383-392页

作者： LIU Zaisheng SHI Hesheng ZHU Junzhang QIU Huaning ZHANG Zhilin YUN Jianbing CNOOC China Limited Shenzhen Shenzhen 518067China State Key Laboratory of Isotopic Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China Hailaer Petroleum Exploration and Development Headquarters PetroChina Daqing Oilfield Company Ltd.Hailar 021000China

The South China Sea began to outspread in the Oligocene. A great quantity of terraneous detritus was deposited in the northern continental shelf of the sea, mostly in Pearl River Mouth Basin, which constituted the main paleo-Pearl River Delta. The delta developed for a long geological time and formed a superimposed area. Almost all the oil and gas fields of detrital rock reservoir distribute in this delta. Thirty-three oil sandstone core samples in the Zhujiang Formation, lower Miocene （23-16 Ma）, were collected from nine wells. The illite samples with detrital K feldspar （Kfs） separated from these sandstone cores in four sub-structural belts were analysed by the high-precision 40Ar/39Ar laser stepwise heating technique. All 33 illite 40Ar/39Ar data consistently yielded gradually rising age spectra at the low-temperature steps until reaching age plateaus at mid-high temperature steps. The youngest ages corresponding to the beginning steps were interpreted as the hydrocarbon accumulation ages and the plateau ages in mid-high temperature steps as the contributions of the detrital feldspar representing the ages of the granitic parent rocks in the provenances. The ages of the detrital feldspar from the Zhujiang Formation in the four sub-structural belts were different：（1） the late Cretaceous ages in the Lufeng 13 fault structural belt; （2） the late Cretaceous and early Cretaceous-Jurassic ages in the Huizhou 21 buried hill-fault belt; （3） the Jurassic and Triassic ages in the Xijiang 24 buried hill-fault belt; and （4） the early Cretaceous - late Jurassic ages in the Panyu 4 oil area. These detrital feldspar 4~Ar/39Ar ages become younger and younger from west to east, corresponding to the age distribution of the granites in the adjacent Guangdong Province, Southern China.

关键词： Illite detrital K feldspar 40Ar/39Ar dating parent rock sandstone reservoir Pearl River Mouth Basin

Growth Responses of Trees to Micronutrients and Their Feedback Effect in Various Soil-Forest Ecosystems of Taihu Lake Region

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Pedosphere 2001年第4期11卷 311-320页

作者： ZHANGHUANCHAO XUHONGQIANG 等 InstituteofSoilScience theChineseAcademyofSciencesNanjing210008（China） CollegeofForestResourcesandEnvironment NanjingForestryUniversityNanjing210037（China）

Vector analysis technique and ecological sequential comparison methods were adopted to study tree growth response to the micronutrients, B, Mo, Cu, Zn, Fe, and Mn, in soils derived from various parent materials in the forest area of Taihu Lake region in southeast China. The results showed that the dry weight of individual current-year needle of Chinese fir (Cunninghamia lanceolata) grown on the soi1 derived from granite parent rock was increased by 8% and 13% in comparison with that grown on the soils derived from sandstone and ash-tuff parent rock, respectively. And such dry weight of loblolly pine (Pinus taeda) grown on the soil derived from sandstone parent rock was increased by 21% in comparison with that on the soil derived from ash-tuff parent rock. One of the reasons for those results was that micronutrients content in the soil derived from ash-tuff parent rock were not sufficient to meet the requirement of the growth of Chinese fir and loblolly pine, i.e., micronutrients in soil were deficient and/or induced deficient. The amounts of Cu, Zn, Fe, and Mn uptake by Chinese fir and loblolly pine were in agreement with the contents of available micronutrients in soil respectively, except for B and Mo. Meanwhile, there might exist an "antagonism" between the uptake of B versus Mo by trees, although more studies are needed to confirm it. Regression analysis indicated that amount of a soil available micronutrient was correlated to the type of parent material and its total amount in the forest floor, except for B. The F test identified that the correlation of each equation reached the significant level to different extents, respectively. The t test confirmed that amount of available forms was mainly depended on the type of parent material for Mo, Cu, Zn and Mn but on the forest floor for Fe. There was a feedback effect of forest stand on the amount of soil available micronutrients. The ability of accumulating available micronutrients in soil was better by the sawtoot

关键词： feedback effect micronutrient parent rock tree growth vector analysis

Difficultly Extractable Fixed Ammonium in Some Soilsof China

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Pedosphere 1999年第2期9卷 185-188页

作者： CHENBIYUN CHENGLILI 等 InstituteofSoilScience theChineseAcademyofSciencesNanjing210008China InstituteofSoilScience theChina

Ninety-three soil samples and 19 sedimentary rock samples collected from 21 provinces of China wereanalyzed for their contents of fixed ammonium and total N by Kjeldahl-HF method. Results showed thatamount of difficultly extractable fixed ammonium (the fixed ammonium that is not determinable by Kjeldahlprocedures commonly used for soils) in soils ranged from 0 to 202 mg kg--1. It was generally more than50 mg kg--1 in soils in Chanaii and Thrpan districts, Xinjiang, accounting for 3.2%~36.8% with an averageof 13.9% of the total N. For some Orthents derived from purple shale and purple sandstone in Sichuan andHunan provinces and Chao soils derived from secondary loess in Henan Province and Ningxia AutonomousRegion it was generally around 30 mg kg--1 , accounting for 4%~7% of the total soil N, and for most of therest of soils studied, with the exception of some subsoils, no or trace difficultly extractable fixed ammoniumcould be detected. It was suggested that the difficultly extractable fixed ammonium was originated fromparent rock, and for slightly weathered soils derived from parent materials rich in this form of N the Kjeldahlmethod might give underestimation of total soil N.

关键词： difficultly extractable fixed ammonium fixed ammonium parent rock